Analysis is the first step in identifying the weak links in an athlete’s performance. While the human eye can only capture 10 frames per second, video captures 30 frames per second. Plus, an evaluator can rewind and replay the video frame-by-frame, enabling him to evaluate all aspects of the athlete’s motion.
Check out the samples below, along with the descriptions of areas of weakness. Click on any image to see it full-screen.
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In this snapshot from a video of Thomas sprinting you can see that his foot, while striking on his forefoot, is still far out in front of his body. This not only creates braking forces slowing him down with each stride, but also puts the ankle at higher risk of injury. This occurs because from his knee drive, he drives his foot down to the ground, rather than pulling his leg back to strike the ground beneath his body.
These two shots show Justin’s hips and shoulders rotating at the same time and also rotating around his spine rather than his forward leg. By improving his weight shift we can help him get that axis of rotation to his forward leg, providing a longer lever to produce more rotational force and a more powerful throwing motion. Additionally, we have been working to improve his flexibility through his trunk to allow his hips to rotate prior to his shoulders in order to promote more use of his powerful oblique muscles to develop more arm speed without using his arms more to develop power. Not only has this improved his throwing power, but Justin has also become a more accurate quarterback.
In the series of two snapshots, you can see that Lara lacks a solid knee drive which prevents her from accomplishing a good paw-back motion, and instead strikes the ground with her heel. The braking forces slow her down with each stride, and have also contributed to pain in her knees.
BJ is already a fast wide receiver. While this shot shows his solid push off motion with his solid ankle extension, but we can see that he lacks a powerful knee drive, which limits the momentum that is derived from the knee drive, but also prevents a very effective pawback action. The first step we’re taking in his training is to work on hip flexion and flexibility to improve the knee drive. Once we have his leg drive closer to parallel to the ground, we’ll really start hitting his hip extension power to develop that outstanding pawback action that he’ll need to reach his goal of 4.3 second 40 yard dash, and a shot at playing in the NFL.