Abstract:
A method of creating a customizable exercise route for a user of a personal navigation device is disclosed. The method includes providing routing instructions for a user along a first route, recording a first speed for a user traveling between a first point and a second point on the first route, providing routing instructions for a user along a second route, recording a second speed for a user traveling between a third point and a fourth point on the second route, comparing the first speed and the second speed to calculate a performance difference related to the first route and the second route, and notifying the user about the performance difference.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The invention relates to a personal navigation device, and more particularly, to a personal navigation device that records fitness performance data about a user as the user exercises along a route for which the personal navigation device provides routing instructions. 
         [0003]    2. Description of the Prior Art 
         [0004]    Global Positioning System (GPS) based navigation devices are well known and are widely employed as in-car navigation devices. Common functions of a navigation device include providing a map database for generating routing instructions that are then shown on a display of the navigation device. These navigation devices are often mounted on or in the dashboard of a vehicle using a suction mount or other mounting means. 
         [0005]    The term “navigation device” refers to a device that enables a user to navigate to a pre-defined destination. The device may have an internal system for receiving location data, such as a GPS receiver, or may merely be connectable to a receiver that can receive location data. The device may compute a route itself, or communicate with a remote server that computes the route and provides navigation information to the device, or a hybrid device in which the device itself and a remote server both play a role in the route computation process. Portable GPS navigation devices are not permanently integrated into a vehicle but instead are devices that can readily be mounted in or otherwise used inside a vehicle. Generally (but not necessarily), they are fully self-contained—i.e. include an internal GPS antenna, navigation software and maps and can hence plot and display a route to be taken. 
         [0006]    As use of personal navigation devices becomes more widespread, pedestrians often carry personal navigation devices with them as they walk or exercise in the city or when they go hiking in the wilderness. The personal navigation device can provide routing instructions to the user if the user enters a destination location into the personal navigation device. Otherwise, if no set destination is entered, the personal navigation device can track the user&#39;s route for helping the user find his way back to the original starting point. 
         [0007]    Unfortunately, the personal navigation device can only provide basic information that is useful to the user when the user is exercising. For example, the user is able to see the total distance traveled and may be able to see the elapsed time for traveling this distance. When the user is exercising, the user may wish to compare current fitness data, including time spent exercising and distance covered, to previous fitness data. However, the user is not able to conveniently see this data or compare performance metrics between different exercising sessions. Moreover, the personal navigation device does not provide any helpful information to the user regarding the user&#39;s progress on reaching fitness goals, such as completing a 10 kilometer run in less than 1 hour. 
       SUMMARY OF THE INVENTION 
       [0008]    It is therefore one of the primary objectives of the claimed invention to provide a method of monitoring fitness levels with a personal navigation device for allowing users to conveniently view and track their fitness progress with the personal navigation device. Different fitness metrics can be created according to the distance traveled or the type of terrain crossed. 
         [0009]    According to an exemplary embodiment of the claimed invention, a method of monitoring fitness levels with a personal navigation device is disclosed. The method includes utilizing the personal navigation device to provide routing instructions for a first route from a first point of the first route to a second point of the first route, measuring a first period of time needed for a user to travel from the first point to the second point and storing the measured first period of time in a memory of the personal navigation device, utilizing the personal navigation device to provide routing instructions for a second route from a third point of the second route to a fourth point of the second route, measuring a second period of time needed for the user to travel from the third point to the fourth point and storing the measured second period of time in the memory, calculating a first speed at which the user traveled between the first point and the second point according to a distance between the first point and second point and the measured first period of time, calculating a second speed at which the user traveled between the third point and the fourth point according to a distance between the third point and fourth point and the measured second period of time, comparing the first speed and the second speed to calculate a performance difference related to the first route and the second route, and notifying the user about the performance difference. 
         [0010]    According to another exemplary embodiment of the claimed invention, a personal navigation device for monitoring fitness levels is disclosed. The personal navigation device includes routing software for utilizing the personal navigation device to provide routing instructions for a first route from a first point of the first route to a second point of the first route, and to provide routing instructions for a second route from a third point of the second route to a fourth point of the second route; a clock for measuring a first period of time needed for a user to travel from the first point to the second point, and for measuring a second period of time needed for the user to travel from the third point to the fourth point; a memory for storing the measured first period of time and the measured second period of time; a processor for controlling the personal navigation device, calculating a first speed at which the user traveled between the first point and the second point according to a distance between the first point and second point and the measured first period of time, calculating a second speed at which the user traveled between the third point and the fourth point according to a distance between the third point and fourth point and the measured second period of time, and comparing the first speed and the second speed to calculate a performance difference related to the first route and the second route; and a user interface for notifying the user about the performance difference. 
         [0011]    It is an advantage that the personal navigation device can record key statistics for a user when the user is exercising such as distance traveled, time elapsed, difficulty level of the route, the terrain type for the route, and so on. The user can thus easily see his past fitness performance data, and make comparisons for determining if his performance is improving or not. If a user has a particular fitness goal in mind, the personal navigation device can also provide feedback to the user about his progress towards meeting the goal. The personal navigation device can help fitness professionals train for competitions as well as help average users keep fit. 
         [0012]    These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0013]      FIG. 1  is a block diagram of a personal navigation device according to the present invention. 
           [0014]      FIG. 2  is a chart showing recorded fitness data according to the present invention. 
           [0015]      FIG. 3  shows a graph plotting a user&#39;s speed with a distance of a route that the user is exercising on. 
           [0016]      FIG. 4  shows a graph plotting a user&#39;s speed with a difficulty of a route that the user is exercising on. 
           [0017]      FIG. 5  shows a chart containing fitness goal data entered by the user. 
       
    
    
     DETAILED DESCRIPTION 
       [0018]    Please refer to  FIG. 1 .  FIG. 1  is a block diagram of a personal navigation device  10  according to the present invention. The personal navigation device  10  contains a display  12  which can be a touch sensitive display, a GPS receiver  14  for receiving the current coordinates of the personal navigation device  10 , a General Packet Radio Service (GPRS) modem  16  for providing internet access, a processor  18  for controlling operation of the personal navigation device  10 , a user interface  20 , a Universal Serial Bus (USB) port  22  for allowing data to be exchanged with a computer, a speaker  24 , a clock  26 , and memory  30 . The memory  30  is used to store a map database  32  containing map data and points of interest, a terrain database  34  containing terrain information of at least some of the areas covered by the map database  32 , routing software  36 , fitness goal data  38 , as well as fitness data  40  recording data about the user&#39;s exercise efforts in the past. The user of the personal navigation device  10  can transfer fitness goal data  38  and fitness data  40  between a computer and the personal navigation device  10  using the USB port  22  or can transfer the data via the internet using the GPRS modem  16 . 
         [0019]    Please refer to  FIG. 2 .  FIG. 2  is a chart  50  showing recorded fitness data  40  according to the present invention. The chart  50  shows time data, distance data, and speed data recorded when a user exercised on the same route two different times. The route may be generated by the routing software  36 , which provides routing instructions for the user to follow the route. Data for time elapsed and distance covered at 4 different points along the route are recorded for both the user&#39;s first trip on the route and the user&#39;s second trip on the route. The route starts at point  0 , and on the user&#39;s first trip along the route, the time elapsed when the user reaches point  1  is 1:34 minutes. Similarly, the time elapsed at point  2  is 3:05 minutes, the time elapsed at point  3  is 4:47 minutes, and the time elapsed at point  4  is 7:05 minutes. The overall speed for traveling from point  0  to point  4  on the user&#39;s first trip on the route is 18.55 km/hr. 
         [0020]    As the user completes the first trip on the route, this time, distance, and speed data is recorded in the fitness data  40  section of memory  30 . Depending on what information the user specified in the fitness goals  38 , the user may be trying to steadily improve his fitness performance. As a result, the user can be given feedback by the personal navigation device  10  as the user exercises along the route the second time. On the user&#39;s second trip along the route, the time elapsed when the user reaches point  1  is 1:36 minutes, which is slightly slower then the user&#39;s first trip on the route. The personal navigation device  10  can inform the user about this situation and encourage the user to try harder. The time elapsed at point  2  is 3:10 minutes, which means that the user has lost even more time compared to the user&#39;s first trip along the route. At this time the personal navigation device  10  can give more feedback to the user, telling the user that he is falling behind the previous pace, and that the user needs to try much harder. Consequently, the user tries harder after point  2 , and the time elapsed at point  3  is 4:49 minutes, which means the user is starting to make up time. The personal navigation device  10  can determine that while the user is speeding up, the user is still behind the pace set on the user&#39;s first trip along the route. Therefore, the personal navigation device  10  can provide encouraging feedback to the user and tell the user that he is doing better and he should keep trying. Finally, the time elapsed at point  4  is 7:01 minutes. Due to the feedback given by the personal navigation device  10  and due to the user&#39;s extra effort after point  2  on the route, the user was able to slightly improve upon his overall time on the user&#39;s second trip along the route. The overall speed for traveling from point  0  to point  4  on the user&#39;s second trip on the route is 18.72 km/hr. 
         [0021]    In the example given above in the chart  50 , the user traveled on the same route two different times. Although fitness level comparisons are easiest to make when the user travels on the same route multiple times, the user is not limited to traveling on the same route over and over again to gauge his fitness performance. Instead, the user can run along other routes and compare speeds at comparable distances for the different routes. The total distances of each route do not need to be the same either since the time and distance associated with a waypoint along the route can be used instead of relying only on the final destination point of the route for determining the user&#39;s speed along the route. In this way, the user can exercise on a number of different routes and still compare fitness data recorded along the different routes. For making comparisons between fitness data recorded on different routes as meaningful as possible, it is helpful if the total length and difficulty of the routes are as similar as possible, as will be explained below. Therefore, the user may choose to only compare fitness data when route distances are within a predetermined distance of each other. 
         [0022]    It is well known that people often move at different paces when exercising on short routes than they do when exercising on long routes. A user often tries to move at a quick pace when exercising on a short route to give his body a better workout during a shorter amount of time. On the other hand, if the user is exercising on a long route, a slower pace is generally used so that the user does not wear himself out before the route is completed. Because of this, the personal navigation device  10  can classify fitness data according to route distance. 
         [0023]    Please refer to  FIG. 3 .  FIG. 3  shows a graph  60  plotting a user&#39;s speed with a distance of a route that the user is exercising on. In general, for shorter routes, the user can exercise at a much quicker speed than the user can for longer routes, as is illustrated in  FIG. 3 . 
         [0024]    Unless two different routes are uniform in difficulty or in terrain type, it becomes harder to make a meaningful comparison between fitness data collected along the two different routes. Therefore, the personal navigation device  10  can make use of terrain data stored in the terrain database  34  for classifying fitness data according to terrain type or difficulty of the route. Terrain can be classified in a variety of different categories, such as routes with flat terrain, routes with hilly terrain, routes in urban areas, routes in a green belt area or a natural area, routes that have a significant number of stairs, or routes along a beach. Otherwise, the terrain can be classified according to a difficulty level, such as on a scale of 1 to 5. 
         [0025]    Please refer to  FIG. 4 .  FIG. 4  shows a graph  70  plotting a user&#39;s speed with a difficulty of a route that the user is exercising on. In general, for easier routes, the user can exercise at a much quicker speed than the user can for more difficult routes, as is illustrated in  FIG. 4 . 
         [0026]    All graphs can be depicted in a variety of different forms, depending on the number of variables involved. Both two-dimensional and three-dimensional graphs can be used, and the user can display the graphs on either the display  12  of the personal navigation device  10  or on a computer. 
         [0027]    Once enough data has been recorded, the user can view the chart  50  and the graphs  60 ,  70  for seeing his performance at comparable distances, and different distances, and at different difficulty levels or terrain types. The user can then have a clear idea of his fitness level, and can more easily identify the areas that he would like to work on. 
         [0028]    When the user is travelling in a place that the user is not familiar with, the user still should keep exercising in order to say in shape. Therefore, the user can enter desired exercise route parameters into the personal navigation device  10 , and the routing software  36  will generate a suitable route for the user to follow. Even when the user is at home, the user can also request that the personal navigation device  10  generate a route in order to try a new route of a certain distance, to try a route with a different distance, to try a route with a different difficulty level, or to change other characteristics of the route. 
         [0029]    When asking the personal navigation device  10  to create a route, the user could specify parameters such as a desired route distance and a desired difficulty level on a scale of 1 to 5. When selecting the route distance, the user can also select whether the starting point of the route should be the same as the ending point of the route. In other words, the route can be a one-way route if the starting and ending points are different, or can be a circular route if the starting and ending points are the same. When selecting the route difficulty level, the routing software  36  reads terrain data from the terrain database  34 , which stores different terrains and their corresponding difficulty levels. The user can even specify that the route be created using two or more different difficulty levels. As an example, the user could choose to start the route with an initial section on easier terrain, follow that with a long middle section on difficult terrain, and finish with a final section on easier terrain. 
         [0030]    The user may choose to enter specific goal data into the fitness goals  38  section of memory  30 . Please refer to  FIG. 5 .  FIG. 5  shows a chart  80  containing fitness goal data entered by the user. The chart  80  contains time periods in which a user would like to complete routes of various distances. For example, the user may have a goal of finishing a 5 km run in 25 minutes, a 10 km run in 60 minutes, and a 15 km run in 100 minutes. Once the user has entered goal data into the fitness goals  38  section of memory  30 , the personal navigation device  10  can provide better feedback and training support to the user for helping the user to achieve his goals. After the user enters fitness goals, the personal navigation device  10  can suggest a training plan or a fitness program for helping the user to slowly build up to achieving this goal. In addition, every time the user exercises on an exercise route, the personal navigation device  10  can provide feedback or comparison results that show how the user is doing compared to past results with various corresponding levels of difficulty or distances of the exercise routes. 
         [0031]    In summary, the personal navigation device records fitness statistics for a user when the user is exercising such as distance traveled, time elapsed, difficulty level of the route, the terrain type for the route, and so on. The user can then view charts or graphs for viewing his fitness performance, and make comparisons with previously stored data to determine if his performance is improving or not. If a user has a particular fitness goal in mind, the personal navigation device can also provide feedback to the user about his progress towards meeting the goal. 
         [0032]    Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention.