Abstract:
A system for analyzing athletic performance is disclosed. The system includes at least one sensor for sensing an aspect of an athletic movement for an athlete that varies during said movement an to generate sensor data corresponding thereto; and a processor for executing instructions to extract portions of the sensor data corresponding to a load phase, an explode phase, and a drive phase of the athletic movement.

Description:
FIELD 
     Embodiments of the present invention relate to athletic performance. In particular, embodiments of the present invention relate to systems for analyzing athletic movement 
     BACKGROUND 
     A force plate may be used to generate data relating to athletic movement, e.g. in the form of a jump. However, the data can be quite voluminous as a data point may be generated once every millisecond. This makes analysis of the data difficult. 
     SUMMARY 
     According to a first aspect of the invention, there is provided a system for analyzing athlete movement data. The system comprises at least one sensor to generate data during the athletic movement. The sensor may be a force-plate configured to generate force-time data corresponding to an athletic movement in the form of a vertical jump. The data is the processed to extract load, explode, and drive phase data corresponding the jump to produce an athletic signature. 
     Other aspects of the invention will be apparent from the detailed description below. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         FIG. 1  shows a logical block diagram of a system to analyze athletic movement, in accordance with one embodiment of the invention. 
         FIG. 2  shows the system of  FIG. 1  implemented with a force-plate, in accordance with one embodiment of the invention 
         FIG. 3  shows a high-level block diagram of hardware used to implement the system of  FIG. 1 , in accordance with one embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION 
     In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the invention can be practiced without these specific details. In other instances, structures and devices are shown in block or flow diagram form only in order to avoid obscuring the invention. 
     Reference in this specification to “one embodiment” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearance of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Moreover, various features are described which may be exhibited by some embodiments and not by others. Similarly, various requirements are described which may be requirements for some embodiments but not other embodiments. 
     Moreover, although the following description contains many specifics for the purposes of illustration, anyone skilled in the art will appreciate that many variations and/or alterations to the details are within the scope of the present invention. Similarly, although many of the features of the present invention are described in terms of each other, or in conjunction with each other, one skilled in the art will appreciate that many of these features can be provided independently of other features. Accordingly, this description of the invention is set forth without any loss of generality to, and without imposing limitations upon, the invention. 
     Referring to  FIG. 1 , embodiments of the present invention disclose a system  100  for analyzing athletic movement. For illustrative purposes consider the athletic movement to be a vertical jump. However, it is to be understood that at the system maybe used to analyze other forms of athletic movement, such as golf and baseball swings, baseball and football throws, sprinting, agility, basketball shooting, and kicking. 
     The system  100  may, at least logically, be divided into a sensing sub-system  102 , an analytical sub-system  104 , and an output sub-system  106 . 
     The sensing sub-system  102  may include sensors for sensing a time-dependent variable that changes during the athletic movement. In one embodiment, the sensing sub-system  102  may include a sensor in the form of a force-plate  108 , as shown in  FIG. 2 . In other embodiments, the sensing sub-system  102  may include other types of sensors. For example, in one embodiment, the sensing sub-system  102  may include an accelerometer, which may be integrated, for example, into a bracelet or a shoe pod. In use, an athlete  110  initiates a vertical jump (athletic movement) on the force-plate  108 . The force plate records changes in force over time (typically one force reading in captured each millisecond). An analog-to-digital converter (not shown) converts the analog force signal into a digital signal for analysis by the analytical sub-system  104 . 
     The analytical sub-system  104  may include instructions to process the digital signal in order to compile an athletic signature for the athlete  110 . In one embodiment, the analytical sub-system  104  extracts selected portions of a force-time curve output by the sensing sub-system  102 . Said selected portions may comprise phases of the jump including a load phase, an explode phase, and a drive phase, as detailed below: 
     (a) load phase: comprises data relating to the average eccentric rate of force development during the jump. 
     (b) explode phase: comprises data relating to the average relative concentric peak force generated during the jump, computed as average concentric peak force divide by the athlete&#39;s weight. 
     (c) drive phase: comprises data relating to the concentric relative impulse for the jump. 
     Typically, the system  100  is configured to process a plurality of jumps for each athlete and to store data for each athlete in the form of an athletic signature 
     Each athletic signature may by used to profile an athlete in terms of at least suitability for a given sport, proneness to injury, suitability for particular athletic gear (e.g. shoes), etc. 
     The output sub-system  106  facilitates output of athletic signatures via printout, display, etc. 
       FIG. 3  shows an example of hardware  300  that may be used to implement portions of the system  300 , in accordance with one embodiment. The hardware  300  may includes at least one processor  302  coupled to a memory  304 . The processor  303  may represent one or more processors (e.g., microprocessors), and the memory  304  may represent random access memory (RAM) devices comprising a main storage of the hardware, as well as any supplemental levels of memory e.g., cache memories, non-volatile or back-up memories (e.g. programmable or flash memories), read-only memories, etc. In addition, the memory  304  may be considered to include memory storage physically located elsewhere in the hardware, e.g. any cache memory in the processor  302 , as well as any storage capacity used as a virtual memory, e.g., as stored on a mass storage device. 
     The hardware also typically receives a number of inputs and outputs for communicating information externally. For interface with a user or operator, the hardware may include one or more user input/output devices  306  (e.g., force-plate, keyboard, mouse, etc.) and a display  308 . For additional storage, the hardware  300  may also include one or more mass storage devices  310 , e.g., a Universal Serial Bus (USB) or other removable disk drive, a hard disk drive, a Direct Access Storage Device (DASD), an optical drive (e.g. a Compact Disk (CD) drive, a Digital Versatile Disk (DVD) drive, etc.) and/or a USB drive, among others. Furthermore, the hardware may include an interface with one or more networks  312  (e.g., a local area network (LAN), a wide area network (WAN), a wireless network, and/or the Internet among others) to permit the communication of information with other computers coupled to the networks. It should be appreciated that the hardware typically includes suitable analog and/or digital interfaces between the processor  312  and each of the components, as is well known in the art. 
     The hardware  300  operates under the control of an operating system  314 , and executes application software  316  which includes various computer software applications, components, programs, objects, modules, etc. to perform the techniques described above. 
     In general, the routines executed to implement the embodiments of the invention, may be implemented as part of an operating system or a specific application, component, program, object, module or sequence of instructions referred to as “computer programs.” The computer programs typically comprise one or more instructions set at various times in various memory and storage devices in a computer, and that, when read and executed by one or more processors in a computer, cause the computer to perform operations necessary to execute elements involving the various aspects of the invention. Moreover, while the invention has been described in the context of fully functioning computers and computer systems, those skilled in the art will appreciate that the various embodiments of the invention are capable of being distributed as a program product in a variety of forms, and that the invention applies equally regardless of the particular type of machine or computer-readable media used to actually effect the distribution. Examples of computer-readable media include but are not limited to recordable type media such as volatile and non-volatile memory devices, USB and other removable media, hard disk drives, optical disks (e.g., Compact Disk Read-Only Memory (CD ROMS), Digital Versatile Disks, (DVDs), etc.), flash drives among others. 
     Although the present invention has been described with reference to specific exemplary embodiments, it will be evident that the various modification and changes can be made to these embodiments without departing from the broader spirit of the invention. Accordingly, the specification and drawings are to be regarded in an illustrative sense rather than in a restrictive sense.