Patent Publication Number: US-11660498-B2

Title: Upper leg and hip exercise method and device to preserve knee and ankle joint while exercising

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation-in-part of, U.S. application Ser. No. 16/575,447, filed on Sep. 19, 2019, which is a continuation-in-part of U.S. application Ser. No. 1655703, which is filed on Aug. 29, 2019, which is a division of U.S. application Ser. No. 15/373,350, which entered the U.S. on Dec. 7, 2016, from KR application No. 10-2016-0164260, filed on Dec. 5, 2016, which is patented on Feb. 20, 2019, in the KR Intellectual Property Office. This application claims the benefit of priority and incorporates by reference, KR Application No. 10-2018-0107382, filed on Sep. 7, 2018; KR Application No. 10-2019-0017985, filed on Feb. 15, 2019, which are patented in KR Intellectual Property Office, and are divisions of KR application No. 10-2016-0164260, filed on Dec. 5, 2016, in the KR Intellectual Property Office, which entered the U.S. on Dec. 7, 2016. This application claims the benefit of priority and incorporates by reference, U.S. application Ser. No. 16/543,613, filed on Aug. 18, 2019; U.S. application Ser. No. 16/543,631, filed on Aug. 19, 2019; U.S. application Ser. No. 16/554,703, filed on Aug. 29, 2019, which are divisions of U.S. application Ser. No. 15/372,350, filed on Dec. 7, 2016; Korean Application No. 10-2019-0041101, filed on Apr. 8, 2019; Korean Application No. 10-2019-0041245, filed on Apr. 9, 2019; Korean Application No. 10-2019-0094661, filed on Aug. 4, 2019; Korean Application No. 10-2019-0097870, filed on Aug. 9, 2019; Korean Application No. 10-2019-0107818 entitled Leg and hip exercise device, filed on Aug. 31, 2019; Korean Application No. 10-2019-0107819, filed on Aug. 31, 2019; Korean Application No. 10-2019-0111516, filed on Sep. 9, 2019; Korean Application No. 10-2019-0111155, filed on Sep. 9, 2019; Korean Application No. 10-2019-0111797, filed on Sep. 9, 2019, Korean Application No. 10-2019-0116635, filed on Sep. 23, 2019, in the Korean Intellectual Property Office. The present application has the same inventor as the aforementioned applications. 
    
    
     FIELD OF THE INVENTION 
     The present disclosure relates to an exercise method and an exercise device for performing exercises suitable to strengthen thigh and hip muscles while protecting the knee and ankle joints such as a leg press machine, a total hip machine, a hip abductor machine, a leg extension machine, a leg curl machine, a stationary bicycle, and more particularly, to an exercise method and an exercise device for strengthening thigh and hip muscles while protecting knee and ankle joints by enabling a user to locate a hip and a thigh of a leg of two legs of the user that is not exercising on a seat and locate a lower end of an arm on the other leg of two legs of the user that is exercising and move the exercising leg backward from an exercise starting position where the exercising leg is pulled toward the users chest such that the user&#39;s exercising leg moves during exercises and the user flexes the hip of the exercising leg. 
     To this end, the exercise device according to the present disclosure includes a seat configured to support a thigh and a hip of a leg of two legs of the user that is not exercising in the sitting or lying position and the arm rotatably attached within a radius of 20 cm from the user&#39;s pelvis in a sagittal plane, wherein an end of the arm is rotatably placed on the user&#39;s leg of a two that is exercising. 
     The exercise device allows the user to exercise the thigh and gluteal muscles while protecting knee and ankle joints of the leg that is not exercising by providing a seat separately from the leg pad when viewed from above, so that the device enables the exercising leg of the user to move to the back of the user from a starting pose at which the hip and the thigh of the leg that is not exercising are placed on the seat and the other leg is placed on the leg pad and pulled to the chest of the user. 
     DESCRIPTION OF RELATED ART 
     Thigh and hip muscles account for more than a third of all muscles in our body. Building thigh and hip muscles may reduce the risk of diabetes, etc., may prevent obesity, and may promote health after middle age, and may also help to improve the physical fitness and sport ability of athletes. 
     However, exercises for strengthening thigh and hip muscles apply a load to ankle and knee joints, and thus knee osteoarthritis and chondromalacia we common among people who do strength training. Also, it is difficult for people with weak knees and ankle joints such as elders or obese people to perform exercises for strengthening thigh and hip muscles. Accordingly, there is a demand for an exercise device for training thigh and hip muscles without adding stress to the knees and joints. In general, a user performs an exercise for strengthening thigh and hip muscles by pulling his/her legs toward the chest and pushing them outward with the pelvis as an axis, as shown in  FIG.  1   . Also, in a general bicycle, since a high hip motion range is limited to a rotation radius of a crank connected to a bicycle pedal, as shown in  FIG.  2   , the users exercise is repeatedly performed only in a relatively small space when compared to the high hip motion range, and thus exercise efficiency in utilization of thigh and hip muscles is limited. 
     However, existing exercise methods and exercise devices may damage the knees and ankle joints because a load is directly transmitted to the ankles and knees, and thus it is not suitable for people with weak knees and ankle joints to use the existing exercise methods and exercise devices. 
     Accordingly, the present disclosure is configured to reduce a force transmitted to the knees and ankles by enabling a user to locate a foot plate or a foot pad of an exercise machine connected to a weight on his/her leg and pull his/her legs toward the chest and push them backward in a sitting, lying, or prone position. 
     When the exercise device according to an embodiment of the present disclosure is used, the users thigh and hip muscles are enabled to perform lateral rotation and adduction as well as extension of the hip joints and extension of the knee joints and a two axes motion. 
     SUMMARY 
     In general, a user performs an exercise for strengthening thigh and hip muscles by pulling the legs toward the chest and pushing them outward with the pelvis as an axis, as shown in  FIG.  1   . Also, in a general bicycle, since a high hip motion range is limited to a rotation radius of a crank connected to a bicycle pedal, as shown in  FIG.  2   , the user&#39;s exercise is repeatedly performed only in a relatively small space when compared to the high hip motion range, and thus exercise efficiency in utilization of thigh and hip muscles is limited. 
     The exercise device according to an embodiment of the present invention includes: an arm pivotably connected to the frame and rotatable wherein the arm comprises an arm pivot axis aligned with a user 5 s hip joint; a leg pad pivotably connected to a lower end of the arm and configured to contact the users leg during use, a handle connected to a lower end of the seat or to the frame and extending therefrom; an arm starting region fixing unit which is provided to fix an exercise starting section; an arm length fixing unit for adjusting the length of the arm; a seat which is configured in correspondence to a hip and a thigh of a leg of two legs of a user so as to support the hip and the thigh of the leg that is not exercising and not to support the hip nor the thigh of the other leg of the user, and thus the seat is separated from the leg pad when viewed from above and is configured to enable the exercising leg of the user to move to the back of the user from a starting pose at which the hip and the thigh of the leg that is not exercising is placed on the seat and the exercising leg is placed on the leg pad and pulled to the chest of the user. Preferably, a leg pad may be configured to contact the users thigh during use to protect the user&#39;s knee and ankle joints while exercising. Also, the exercise method and the exercise device improve the exercise effect of strengthening thigh and hip muscles by adding a hip joint motion direction, axis, and knee joint motion. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a view illustrating a general hip joint motion range in a sagittal plane; 
         FIG.  2    is a view illustrating a motion range of a bicycle crank; 
         FIG.  3    is a view for describing an exercise device according to an embodiment of the present invention to which the seat is attached to be separated from the leg pad when viewed from above, in order to perform an extension operation of the user&#39;s right leg when the user is sitting on the seat with the left leg and the left hip of the user; 
         FIG.  4    is a diagram for describing an exercise device according to an embodiment of the present invention, the diagram showing a rectangular shaped seat base which is provided as a seat angle fixing unit; 
         FIG.  5    is a view for describing the exercise device according to an embodiment of the present invention to which the seat is attached to be separated from the leg pad when viewed from above, in order to perform an extension operation of the user&#39;s right leg when the user is sitting on the seat with the left leg and the left hip of the user or vice versa; 
         FIG.  6    is a diagram for describing the exercise device according to an embodiment of the present invention, the diagram showing a state in which the seat is adjusted to be unseparated from the leg pad when viewed from above, in order to perform adduction of the right leg when the user is sitting on the seat with the left leg and the left hip of the user; 
         FIG.  7    is a view for describing the exercise device according to an embodiment of the present disclosure to which the seat is attached to be separated from the leg pad when the arm is rotated to be in the center and viewed from above, in order to perform an extension operation of the user&#39;s right leg when the user is sitting on the seat with the left leg and the left hip of the user; 
         FIG.  8    is a diagram for describing the exercise device according to an embodiment of the present invention, to which the seat is attached to be separated from the leg pad when viewed from above, in order to perform an extension operation of the user 5 s right leg when the user is sitting on the seat with the left leg and the left hip of the user; 
         FIG.  9    is a diagram for describing the exercise device according to an embodiment of the present invention, to which the seat is attached to be separated from the leg pad when viewed from above, in order to perform an extension operation of the user&#39;s right leg when the user is sitting on the seat with the left leg and the left hip of the user; 
         FIG.  10    is a diagram for describing the exercise device according to an embodiment of the present invention, the diagram showing a state in which the seat is adjusted to be unseparated from the leg pad when viewed from above, in order to induct the user 5 s right leg when the user is sitting on the seat with the left leg and the left hip of the user; 
         FIG.  11    is a diagram for describing the exercise device according to an embodiment of the present invention, the diagram showing a state in which the seat is adjusted to be unseparated from the leg pad when viewed from above, in order to lie down on his/her back placed on the seat, perform a motion for stretching his/her back straight from a starting pose at which the user places the leg pad above the pelvis, bends his/her knees to put feet on the ground, and bend his/her back to 90 degrees; 
         FIG.  12    is a diagram for describing the exercise device according to an embodiment of the present invention, the diagram showing a state in which the seat is attached to be separated from the leg pad when the arm is rotated to be in the center and viewed from above, in order to sk on the seat with both of the user&#39;s hip and thigh and perform leg extension exercises; 
         FIG.  13    is a diagram for describing the exercise device according to an embodiment of the present invention, to which the seat is attached to be separated from the leg pad when viewed 
       from above, in order to perform an extension operation of the user&#39;s left leg when the user is sitting on the seat with the right leg and the right hip of the user; 
         FIG.  14    is a diagram for describing the exercise device according to an embodiment of the present invention, to which the seat is attached to be separated from the leg pad when viewed from above, in order to perform an extension operation of the user&#39;s left leg when the user is sitting on the seat with the right leg and the right hip of the user; 
         FIG.  15    is a diagram for describing the exercise device according to an embodiment of the present invention, to which the seat is seat is attached to be separated from the leg pad when the arm is rotated to be in the center and viewed from above, and it is adjusted to perform an extension and abduction operation of the user&#39;s left leg when the user is sitting on the seat with the right leg and the right hip of the user; 
         FIG.  16    is a diagram for describing the exercise device according to an embodiment of the present invention, to which the seat is attached to be separated from the leg pad when viewed from above, and it is adjusted to perform an extension and abduction operation of the user&#39;s right leg when the user is sitting on the seat with the left leg and the left hip of the user; 
         FIG.  17    is a partial view illustrating a two axes mechanism  44   a  of  FIG.  16    which is provided on the arm and the arm is rotatable about both the x-axis (parallel to the ground) and the y-axis (perpendicular to the ground) according to the present disclosure; 
         FIG.  18    is an exploded perspective view of the two axis mechanism of  FIG.  17   . 
         FIG.  19    is a diagram for describing the exercise device according to an embodiment of the present invention, the diagram showing a state in which the seat is adjusted to be unseparated from the leg pad when viewed from above, and the diagram illustrates a seat strut attachment unit for attaching the seat strut to the arm strut or separating the seat strut from the arm strut on the user&#39;s purpose. 
         FIG.  20    is a diagram for describing the exercise device according to an embodiment of the present invention, the diagram showing a state in which the seat is adjusted to be unseparated from the leg pad when viewed from above, in order to lie down on his/her back placed on the seat, perform a motion for stretching his/her back straight from a starting pose at which the user places the leg pad above the pelvis; or perform stretching his/her knees from starting position where the thighs and hips are on the seat and knees are bend to 90 degrees; or curling his/her knees motion from starting position where the thighs and hips are on the seat and knees are stretched and the leg pad is on his/her back of the lower legs. 
         FIG.  21    is a diagram for describing the exercise device according to an embodiment of the present invention, to which the seat is attached to be separated from the leg pad when viewed from above, in order to perform an extension operation of the user&#39;s left leg when the user is sitting on the seat with the right leg and the right hip of the user. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In the following description, well-known elements are not described in detail since they would obscure the invention with unnecessary detail. Various modifications and alternatives may be made in the present disclosure, and embodiments will herein be described in detail. It should be understood, however, that there is no intent to limit embodiments to the particular forms disclosed, but on the contrary, embodiments are to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure. The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting of embodiments. It will be further understood that the terms “comprises”, “comprising”, “includes”, and/or “including”, when used herein, specify the presence of stated features, integers, elements, components, and/or groups thereof but do not preclude the presence or addition of one or more other features, integers, elements, components, and/or groups thereof. 
     Embodiments of an exercise for strengthening thigh and hip muscles of the present disclosure for accomplishing the objectives will now be described with reference to the attached drawings. 
       FIGS.  1  and  2    are views respectively illustrating a general hip joint motion range in a sagittal plane and a motion range of a bicycle crank.  FIG.  3   , through  FIG.  16    are views in which exercise devices according to an embodiment of the present disclosure include: an arm  32  pivotably connected to the frame  10  and rotatable wherein the arm comprises an arm pivot axis  44  aligned with a user&#39;s hip joint; a handle connected to a lower end of the seat  20  or to the frame  10  and extending therefrom; a seat  20  which is provided in correspondence to a hip and a thigh of a leg of two legs of a user that is not exercising so as to support the hip and the thigh of the leg that is not exercising and not to support the hip nor the thigh of the other leg of the user, and thus the seat  20  is separated from the leg pad  64  when viewed from above  20   b . The invention is configured to enable the exercising leg of the user to move to the back of the user from a starting pose at which the hip and the thigh of the leg that is not exercising is placed on the seat  20  and the exercising leg is placed on the leg pad  56  and pulled to the chest of the user.  FIGS.  6 ,  10 ,  11 ,  12    are views in which the seat is provided separately from the leg pad  64  when viewed from above  20   b , and adjusted by the user with a seat angle fixing unit, a seat location fixing unit or an arm location fixing unit, to be unseparated from the leg pad  64  when viewed from above  20   a , so that, the user can perform other exercises additionally according to the purpose.  FIG.  15 ,  16    are views illustrating a two axes mechanism  44   a  which is attached to an exercise device according to an embodiment of the present invention.  FIGS.  17 ,  18    are partial views illustrating the two axes mechanism  44   a  of  FIGS.  15 ,  16    which is provided on the arm  32 . A detailed configuration is illustrated and will be described in detail. 
       FIG.  3    describes an exercise device according to an embodiment of the present invention, in which an arm  32  is rotatably connected to the resistive force strut of the frame  10   c , and a leg pad  64 , an arm axis  44 , a seat  20 , an arm connector  33 , cross strut of the frame  14 , a handle  114 , an arm pivot axis  44 , a rear ground support member of the frame  19 , a seat strut of the frame  13 , knee support for supporting a leg of two legs of the user that is not exercising  63 , knee support height fix unit  69 , knee support right/left adjustment unit  68 , foot rest  65 , a set of weight stack  71 , a seat angle fixing unit  116  which is on the frame are attached according to an embodiment of the present invention and shows a state in which a user adjusted a seat to be perpendicular to a leg pad when viewed above  20   b  enabling a user to locate a hip and a thigh of a right leg of two legs of the user that is not exercising and set the arm starting region fixing unit  45  to the right side when viewed from above in order to perform a press down and kick back motion of the left leg of the user. 
       FIG.  4    describes an exercise device according to an embodiment of the present invention, in which an arm is  32  rotatably connected to the seat strut of the frame  13 , and a leg pad  64 , an arm axis  44 , a seat  20 , a cross strut of the frame  14 , a handle  114 , a foot support for supporting a foot of two feet of the user that is not exercising  61 , a handle strut of the frame  10   a , a seat strut of the frame  13 , an elastic ban  75  as a resistive force, and shows a state in which a seat base  21  having a rectangular shape are provided, such that a user may attach the seat at a 90 degree, 180 degree, 270 degree, or 360 degree angle when viewed from above according to purposes. 
       FIG.  5    describes an exercise device according to an embodiment of the present invention, in which an arm  32  is rotatably connected to the seat strut of the frame  13 , and a leg pad  64 , a seat in a state perpendicular to the leg pad  20   b , a cross strut of the frame  14 , a handle  114 , a frame  10 , an elastic band  75  as a resistive force, are provided and shows a state in which the angle of the seat is adjusted to 0 or 360 degrees around the seat support when viewed from above  20   b , such that a users leg may perform an hip extension operation. 
       FIG.  6    describes an exercise device according to an embodiment of the present invention, in which an arm  32  is rotatably connected to the seat strut of the frame  13 , and a leg pad  64 , a seat in a state parallel to the leg pad  20   a , a cross strut of the frame  14 , a handle  114 , a frame  10 , a foot support for supporting a foot of two feet of the user that is not exercising  61 , an elastic band  75  as a resistive force, a seat holder  25  for holding the eat  20   b  are provided, and shows a state in which the seat is attached to a seat base and the angle of the seat is adjusted to  20   a  when viewed from above  20   a  to enable a users legs to perform abduction and adduction. 
       FIG.  7    describes an exercise device according to an embodiment of the present invention, in which an arm  32  is rotatably connected to the seat strut of the frame  13 , and a leg pad  64 , a seat in a state perpendicular to the leg pad  20   b , a cross strut of the frame  14 , a handle  114 , a frame  10 , a leg pad  64 , a foot support for supporting a foot of two feet of the user that is not exercising  61 , a set of weight stack  71  as a resistive force, a foot support fixing unit  65  capable of changing the position of the foot support to the left or right. A foot support height fixing unit  66  that may adjust the height of the foot support height, a seat strut of a frame  13 , an arm starting region fixing unit  45 , a roller for arm starting fixing unit  45 , a seat handle  12 , a seat holder  25  for holding the seat  20   b , a seat angle fixing unit  116 , a roller for seat angle fixing unit  35 , a roller base for sit angle fixing unit  36  are provided and shows a state in which the seat angle fixing unit for adjusting the angle between the seat and frame is adjusted to enable the user to perform a press down and kick back motion of the right leg. 
       FIG.  8    describes an exercise device according to an embodiment of the present invention, to which the seat is attached to be separated from the leg pad when viewed from above  20   b , and a seat angle fixing unit  116  is attached under the meat, and adjusted to perform an extension operation of the user&#39;s right leg when the user is sitting on the seat with the left leg and the left hip of the user. 
       FIG.  9    describes a state in which a seat handle  12 , a handle  114 , a frame  10 , a seat  20 , an arm  32 , an arm length fixing unit  52 , an arm angle fixing unit  116 , a seat height fixing unit  24 , a eat height fixing pin  23 , a leg pad  64 , a eat base  21 , an arm starting region fixing unit  45  on the arm, an arm connector  33  for connecting the arm to the frame, an arm axis height fixing unit  115 , a set of weight stack  71 , are attached. 
       FIG.  10    describes a state in which a seat handle  12 , a handle  114 , a frame  10 , a seat  20 , an arm  32 , an arm length fixing unit  52 , an arm angle fixing unit  116 , a seat height fixing unit  24 , a cross strut of the frame  14 , a handle  114 , a seat height fixing pin  23 , a seat base  21 , a leg pad  64 , an arm starting region fixing unit  45 , an arm connector  33  for connecting the arm to the frame, an arm axis height fixing unit  115 , a set of weight stack  71 , are attached according to an embodiment of the present invention and describes a state in which the seat angle fixing unit for adjusting the angle between the seat and the leg pad is attached to be perpendicular, so that, it enables the user to induct the user&#39;s right leg. 
       FIG.  11    describes a state in which a seat handle  12 , a handle  114 , a frame  10 , a seat  20 , an arm  32 , an arm length fixing unit  52 , an arm angle fixing unit  116 , a seat height fixing unit  24 , a cross strut of the frame  14 , a leg pad  64 , a handle  114 , a seat height fixing pin  23 , a seat base  21 , an arm starting region fixing unit  45 , an arm connector  33  for connecting the arm to the frame, an arm axis height fixing unit  115 , a et of weight stack  71 , are attached according to an embodiment of the present invention and describes a state in which the seat angle fixing unit for adjusting the angle between the seat and the leg pad is attached to be parallel to each other, so that, it enables the user to lie down on his/her back placed on the seat, perform a motion for stretching his/her back straight from a starting pose at which the user places the leg pad above the pelvis, bends his/her knees to put feet on the ground, and bend his/her back to 90 degrees; or abduct the user&#39;s right leg. 
       FIG.  12    describes a state in which a handle  114 , a frame  10 , a seat  20 , a seat height fixing unit  24 , a handle  114 , a leg pad  64  an arm starting region fixing unit  45 , a set of weight stack  71 , a moving mechanism  9  as a seat location fixing unit provided on the frame for moving the seat vertically c/d when seen above, a moving mechanism  8  for moving the seat laterally a/b is attached and shows a state to which a moving mechanism is attached according to an embodiment of the present invention and configured to move the seat laterally from the original existing location of the seat so that, a seat location fixing unit adjusts the seat to be parallel to the leg pad  64  and aligned to the leg pad when viewed from above, and the arm starting region fixing unit enable the user to lie down on his/her back placed on the seat, perform a motion for stretching his/her back straight from a starting pose at which the user places the leg pad above the pelvis, bends his/her knees to put feet on the ground, and band his/her back to 90; or sit on the seat with both of the user 5 s hip and thigh and perform leg extension exercises; or sit on the seat with both of the user&#39;s hip and thigh and perform leg curl exercises; or place left hip and thigh of the user on the seat and perform abduction exercise with the right leg of the user; or lie down on his/her back placed on the seat, perform a motion for stretching his/her back straight from a starting pose at which the user places the leg pad above the pelvis, bends his/her knees to put feet on the ground, and bend his/her back to 90 degrees. 
       FIG.  13    describes a state in which a handle  114 , a frame  10 , a seat  20 , a seat height fixing unit  24 , a handle  114 , a leg pad  64 , an arm starting region fixing unit  45 , an arm axis  44 , a set of weight stack  71 , a moving mechanism  9  as a seat location fixing unit for moving the seat vertically c/d when seen above, a moving mechanism  8  for moving the seat laterally a/b are attached according to an embodiment of the present invention and shows a state to which a moving mechanism is attached and configured to move the seat vertically from the original existing location of the seat so that, a seat location fixing unit adjusts the seat to be parallel and aligned to the leg pad when viewed from above, and the arm starting region fixing unit enable 
     the user to place aright hip and right thigh of the user on the seat, place the users left leg on the leg pad, and move the left leg of the user backward from an exercise starting position where the leg is pulled toward the users chest such that the users leg moves during exercises and the user flexes the hip while exercising. 
       FIG.  14    describes a state in which a handle  114 , a frame  10 , a seat  20 , a handle  114 , a leg pad  64 , a set of weight stack  71 , a moving mechanism  91  as an arm axis location fixing unit provided on the frame for moving the seat vertically c/d when seen above, a moving mechanism  81  for moving the seat laterally a/b are attached and shows a state to which a moving mechanism are attached according to an embodiment of the present invention and configured to move the arm fixing unit vertically from the original existing location of the arm so that, an arm location fixing unit adjusts the range of motion of the leg pad to be separated with the seat when viewed from a sagittal plane, and the arm starting region fixing unit and the arm location fixing unit enable the user to place aright hip and right thigh of the user on the seat, place the users left leg on the leg pad, and move the left leg of the user backward from an exercise starting position where the leg is pulled toward the users chest such that the user&#39;s leg moves during exercises and 
     the user flexes the hip while exercising. 
       FIG.  15   , describes a state in which a seat for the right hip and the right thigh of the user,  20   bb  for the left hip and the left thigh of the user, a seat handle  12 , a handle  114 , a frame  10 , a seat  20 , an arm  32 , an arm axis  44 , a seat height fixing unit  24 , a cross strut of the frame  14 , a leg pad  64 , a handle  114 , a seat height fixing pin  23 , a seat casing  22 , a seat base  21  for adjusting the seat height, an arm connector  33  for connecting the arm to the frame, a set of weight stack  71 , a weight disk  60 , a weight disk holder  59 , a leg pad connector  62  for connecting the leg pad and the arm, two pads  52 , a torso support  26 , pad connector  51  for connecting the leg connecter and the pad  52 , and shows a state to which a two axes mechanism  44   a  that enable a pivot axis of the arm portion to be rotatable about both a y-axis perpendicular to the ground and an x-axis parallel to the ground so that the user performs a rotation activity about both the x-axis and the y-axis are attached. It shows a state which allows the user to sit on the seat with right hip and right thigh of the user that is not exercising, locate left foot of the user on the leg pad, and move the left leg backward and spread apart from an exercise starting position where the left leg is pulled toward the users chest and put together when viewed from above 
       FIG.  16   , describes a state in which a seat for the right hip and the right thigh of the user,  20   bb  for the left hip and the left thigh of the user and the  20   ba  and  20   bb  can be used to support the back of the user when the user is in a lying position, a seat handle  12 , a handle  114 , a frame  10 , a seat  20 , an arm  32 , an arm axis  44 , a leg pad  64 , a handle  114 , two pads  52 , a weight disk  60 , a weight disk holder  59 , are attached according to an embodiment of the present invention and shows a state to which a two axes mechanism  44   a  that enable a pivot axis of the arm portion to be rotatable about both a y-axis perpendicular to the ground and an x-axis parallel to the ground so that it allows the user to lie on the seat with left hip and left thigh of the user that is not exercising, locate right thigh of the user on the leg pad, and move the right leg backward and spread apart from an exercise starting position where the right leg is pulled toward the users chest and put together. 
       FIG.  17    describes partial view illustrating a two axes mechanism  44   a  of  FIG.  17    which is provided on the arm  32  and the arm is rotatable about both the x-axis (parallel to the ground) and the y-axis (perpendicular to the ground) according to the present disclosure. It describes a state in which the roller base  77  (referred to as first roller base  77 ) configured to support rotation of the roller  48  (referred to as first roller  48 ) about an x-axis parallel to the ground includes a second roller  111  perpendicularly intersecting the first roller base  77  and configured to rotate about a second arm pivot axis  113  parallel to a y-axis perpendicular to the ground, a second bearing  112  configured to support rotation of the second roller  111 , a bearing  94  having a horizontal cylindrical shape and located on a central portion of a side surface of the pivot axis  44  of the arm portion, are attached according to an embodiment of the present invention. 
       FIG.  18    shows an exploded perspective view of the two axis mechanism  44   a  of  FIG.  18    and describes a state in which the roller base  77  (referred to as first roller base  77 ) configured to support rotation of the roller  48  (referred to as first roller  48 ) about an x-axis parallel to the ground includes a second roller  111  perpendicularly intersecting the first roller base  77  and configured to rotate about a second arm pivot axis  113  parallel to a y-axis perpendicular to the ground, a second bearing  112  configured to support rotation of the second roller  111 , and a second roller base  110  provided on an end of the first roller base  77 , a bearing  94  having a horizontal cylindrical shape and located on a central portion of a side surface of the pivot axis  44  of the arm portion, and configured to support rotation of the second roller  111  are attached according to an embodiment of the present invention. 
     The exercise device according to an embodiment of the present invention preferably includes: an arm  32  pivotably connected to the frame  10  and rotatable wherein the arm comprises an arm pivot axis  44  aligned with a user&#39;s hip joint; a leg pad  64  pivotably connected to a lower end of the arm and configured to contact the users leg during use, a handle connected to a lower end of the seat or to the frame and extending there from  114 ; an arm starting region fixing unit 
       45  which is provided to fix an exercise starting section; an arm length fixing unit  52  for adjusting the length of the arm; a seat  20  which is configured in correspondence to a hip and a 
     thigh of a leg of two legs of a user so as to support the hip and the thigh of the leg that is not exercising and not to support the hip nor the thigh of the other leg of the user, and thus the seat  20  is separated from the leg pad  64  when viewed from above  20   b . In addition, as shown in  FIGS.  3  through  16   , the arm may comprise a pivot axis on rear end of the seat, aligned with a user&#39;s hip joint, within a radius of 20 cm from the users pelvis when viewed in a sagittal plane. 
     The device is configured to enable the exercising leg of the user to move to the back of the user from a starting pose at which the hip and the thigh of the leg that is not exercising is placed on the seat  20  and the exercising leg is placed on the leg pad  64  and pulled to the chest of the user. Preferably, a leg pad may be configured to contact the users thigh during use to protect the user&#39;s knee and ankle joints while exercising the thigh and gluteal muscles. In addition, a torso support  26  may be located in front of or behind the seat and a torso support angle adjustment may be configured to support the user in lying position. Also, as shown in  FIGS.  15 ,  16   , a seat  20  ( 20   ba  or  20   bb ) can be used to support the back of the user when the user is in a lying position and a seat handle  12  may be provided as shown in  FIGS.  7 ,  9 , 15   . 
     Selectively, as shown in  FIGS.  15 ,  16   , a seat for the right hip and the right thigh of the user  20   ba  and a seat for the left hip and the left thigh of the user  20   bb  can be provided and the  20   ba  and  20   bb  can be used to support the back of the user when the user is in a lying position. 
     In addition, an arm starting region fixing unit  45  can be provided on the arm to fix an exercise starting section to the left when a user exercises the left leg and fix the exercise starting section to the right when the user exercises the right leg, and thus the user may adjust the exercise starting section according to his/her purpose. 
     An exercise device according to an embodiment of the present invention may further include a seat angle fixing unit  116  for adjusting the angle between the seat  20  and the leg pad  64 , so that, when the seat angle fixing unit  116  adjusts the leg pad  64  and the seat  20  to be parallel to each other when viewed from above  20   a , as shown in  FIG.  10   , the seat angle fixing unit  116  enables moving legs of a user to abduct, adduce, or gather and spread while the user is seating, or lying down on the seat  20  and placing a thigh and a hip of a leg of two legs of the user on the leg pad  64 . Also, when the seat angle fixing unit  116  adjusts the leg pad  64  and the seat  20  to be perpendicular to each other when viewed from above  20   b , as shown in  FIG.  5 ,  7 ,  8 ,  9   , the seat angle fixing unit  116  enables the user to place a leg of two legs of the user on the leg pad  64  and lower the leg and kick back from a starting pose at which the thighs are pulled toward 
     the chest of the user, while the thigh and the hip of the other leg of the user are on the seat  20 . 
     The seat angle fixing unit  116  may include a fixing screw  35 , a roller provided at one end of the seat strut of the frame  13  which is connected to the seat  20 , a roller base  34  connected to a cross strut of the frame  14 . When a user tries to extend and lower the right leg and kick down, as shown in  FIG.  7 ,  8 ,  9   , the roller is rotated to place the seat  20  in correspondence to the left thigh and left hip of the user and the eat  20  is fixed by using the fixing screw, such that the user may lower the right leg and kick back from a starting pose at which the user places the left leg on the seat and pulls the right leg toward the chest while seating, or lying down on his/her back. 
     In addition, as shown in  FIG.  11   , when the arm starting region fixing unit  45  fix the arm relatively low, and the seat angle fixing unit  116  adjusted the seat  20  and the leg pad  64  to be parallel to each other when viewed from above  20   a , while a user is lying down on his/her back placed on the seat  20 , the user may additionally perform a motion for stretching his/her back straight from a starting pose at which the user places the leg pad  64  above the pelvis, bends his/her knees to put feet on the ground, and bend his/her back to 90 degrees (hip bridge exercise). 
     Also, as shown in  FIG.  9   , a seat height adjusting urdt  24  provided on the frame, an arm length fixing unit  52 , an arm axis height adjusting unit  115  may be provided on the frame to adjust the height of the seat or the height of the arm axis relatively low, such that, they make it convenient for the user to lie down on his/her back placed on the eat  20 , perform a motion for stretching his/her back straight from a starting pose at which the user places leg pad  64  above the pelvis, bends his/her knees to put feet on the ground, and bend his/her back to 90 degrees. 
     Meanwhile, when the arm starting region fixing unit  45  fix the arm to be relatively low, and the seat angle fixing unit  116  adjusted the seat  20  and the leg pad  64  to be parallel to each other when viewed from above, as shown in  FIG.  11   , the user may additionally perform a motion for stretching his/her knees straight from a starting pose at which the user places both of the user&#39;s leg on the seat  20  and put the leg pad  64  above the lower legs, bends his/her knees, and stretch his/her knees (leg extension exercise). Also, when the arm starting region fixing unk  45  fix the arm parallel to the ground, and the seat angle fixing unit  116  adjusted the seat  20  and the leg pad  64  to be parallel to each other when viewed from above, as shown in  FIG.  11   , the user may additionally perform a motion for curling his/her knees from a starting pose at which the user places both of the user&#39;s leg on the seat  20  and put the leg pad  64  under the lower legs, stretch his/her knees, and curl his/her knees (leg curl exercise). 
     Selectively, as shown in  FIG.  8   , a seat angle fixing unit  116  maybe provided to adjust the angle between the seat  20  and the frame  10  on the user&#39;s purpose. 
     An exercise device according to an embodiment of the present invention may further include a seat location fixing unit for adjusting the location of the seat. The seat location fixing unit may comprise a moving mechanism  8 / 9 , the moving mechanism  9  move the seat vertically c from the original existing location of the seat so that, when the seat location fixing unit adjusts the seat  20  to be aligned to the leg pad  64  when viewed from above  20   a , as shown in  FIG.  12   , the moving mechanism and the arm starting region fixing unit  45  enable the user to lie down on his/her back placed on the seat, perform a motion for stretching his/her back straight from a starting pose at which the user places the leg pad above the pelvis, bends his/her knees to put feet on the ground, and bend his/her back to 90; additionally perform a motion for stretching his/her knees straight from a starting pose at which the user places both of the user&#39;s leg on the seat  20  and put the leg pad  64  above the lower legs, bends his/her knees, and stretch his/her knees; also, the user may additionally perform a motion for curling his/her knees from a starting pose at which the user places both of the user&#39;s leg on the seat  20  and put the leg pad  64  under the lower legs, stretch his/her knees and curl his/her knees. 
     The moving mechanism  9  may also move the seat vertically d to the space of the original existing location of the seat so that, the seat location fixing unit adjusts the seat to be separated from the leg pad  64  when viewed from above, the seat angle fixing unit and the arm starting region fixing unit enable the user&#39;s exercising leg to move to the back of the user from a starting pose at which the hip and the thigh of the leg that is not exercising is placed on the seat and the exercising leg is placed on the leg pad and pulled to the chest of the user. 
     The seat location fixing unit may also include a moving mechanism  8  that may move the seat laterally b from the original existing location of the seat so that, as shown in  FIG.  12   , the moving mechanism  8  and the arm starting region fixing unit  45  make it convenient for the user to lie down on his/her back placed on the seat, and perform a motion for stretching his/her back straight from a starting pose at which the user places the leg pad above the pelvis, bends his/her knees to put feet on the ground, and bend his/her back to 90; additionally perform a motion for stretching his/her knees straight from a starting pose at which the user places both of the user&#39;s leg on the seat  20  and put the leg pad  64  above the lower legs, bends his/her knees, and stretch his/her knees; also, perform a motion for curling his/her knees from a starting pose at which the user places both of the user&#39;s leg on the seat  20  and put the leg pad  64  under the lower legs, stretch his/her knees, and curl his/her knees. 
     In addition, a leg pad connector  62  may be provided to connect the leg pad and the arm  32 . Also, as shown in  FIGS.  15 ,  16   , the arm may be provided with a pad or two pads or “H” shaped pad to contact the thigh of the user when the user abduct, adduce, or gather and spread while the user is seating, or lying down on the seat  20  and placing the thigh and the hip of the leg of two legs of the user on the leg pad  64 . 
     As shown in  FIGS.  10 ,  11 ,  15   , the seat  20  may further include pads on both side surfaces of the seat in correspondence to both sides of thighs of a user. As shown in  FIG.  10   , when the user tries to adduce or gather the left leg, the user uses a pad provided on the left side of the seat in correspondence to the thigh of the user. When the user tries to abduct or spread the left leg, the user uses a pad provided on the right side of the seat in correspondence to the thigh of the user. 
     As shown in  FIG.  10   , when the user tries to adduce or gather the right leg, the user uses a pad provided on the left side of the seat in correspondence to the thigh of the user. When the user tries to abduct or gather the right leg, the user uses a pad provided on the left side of the seat in correspondence to the thigh of the user. Also, as shown in  FIG.  11   , pads at both sides of the seat in correspondence to both sides of a use&#39;s thighs maybe foldably arranged. 
     Selectively, the frame may include a cross strut  14 , a seat strut  13 , a handle strut  10   a , an arm strut  10   b , and a resistive force strut  10   c . So the arm  32  may be connected to the handle strut of the frame ( FIGS.  8 ,  9 ,  10   .  11 ), the seat strut of the frame ( FIGS.  4 ,  5 ,  6 ,  7 ,  15   ), the resistive force strut of the frame ( FIG.  3   ), or the arm strut of the frame ( FIGS.  12 ,  13 ,  14 ,  16   ). 
     Selectively, the exercise device according to an embodiment of the present disclosure may include a two axes mechanism  44   a  provided on the frame, that enable a pivot axis of the arm portion to be rotatable about both a y-axis perpendicular to the ground and an x-axis parallel to the ground so that the user performs a rotation activity about both the x-axis and the y-axis, so that, the two axes mechanism  44   a  provided on the frame allow the user to sit or lie on the seat with a hip and a thigh of two legs of the user, locate the other leg of the two legs of the user on the leg pad, and move the leg which is on the leg pad backward and rotate the leg rightward or vice versa; or spread the leg apart or put together, from an exercise starting position where the exercising leg is pulled toward the users chest and put together or spread apart while the other leg of the user is on the seat. 
     The exercise device according to an embodiment of the present disclosure may include a resistive force generator configured to generate a resistive force when the arm portion  32  pivots and a connector may be configured to connect the resistive force generator to the frame  10 . For example, as shown in  FIGS.  7 ,  8 , and  10  through  16   , the resistive force generator may include the load block  71 . In order to generate resistance against rotation of the arm portion, the load block  71  is connected to the arm connector  33 , which includes a rotation roller that rotates around the rotation shaft  44  and a roller base supporting and surrounding the roller, via a wire. Also, as shown in  FIG.  15   , the resistive force generator may include the weight disk  60  or an clastic band  75  ( FIG.  5   ). In addition, a two axes mechanism  44   a  that enable a pivot axis of the arm portion to be rotatable about both a y-axis perpendicular to the ground and an x-axis parallel to the ground may comprise two resistive force generator configured to generate the resistive force against each pivoting axes of the arm. the frame comprises an arm strut and a seat strut, wherein the arm strut and the seat strut is separated, wherein the arm strut comprises a seat strut attachment unit for attaching the seat strut to the arm strut or separating the seat strut from the arm strut on the user&#39;s purpose. 
       FIG.  21    show the exercise device according to an embodiment of the present disclosure in which the arm strut and the seat strut is separate and it also shows a seat strut attachment unit for attaching the seat strut to the arm strut or separating the seat strut from the arm strut on the user&#39;s purpose. 
       FIGS.  19 ,  20 ,  21    show the exercise device according to an embodiment of the present disclosure in which the frame comprises an arm strut  10   b  and a seat strut  13 ; further comprising a seat location fixing unit  13   z  on the seat strut  13 , for adjusting the location of the seat. 
     wherein the seat strut  13  is composed of a seat location fixing rod  13   a  and some seat location fixing places  13   b.    
     The seat location fixing place  13   b  may compose several holes  89  for the user to choose to adjust(put) the said seat location fixing rod  89   a  according to the his/her purpose. 
     The exercise device of claim  1 , wherein the frame comprises an arm strut and a seat strut; further comprising arm axis location fixing unit on the arm strut for adjusting the location of the arm axis.