Derek Norris. Baseball Player Mechanics Analysis - Oakland A’s

The analysis of some aspects of the technique can help to explain the athlete’s performance, injuries and his/her future possibilities. With the information that we present in this blog I’m not intended to replace a scientifically organized evaluation process, but just to play with the available information.

Mr. Norris does not have a history of recurrent injuries except for his left hand and wrist. Recently he suffered a sprained right ankle.
Analyzing his running technique we can observe a complete extension of his knees before landing in front of the hip with his heels. When analyzing him from behind we can see also an apparent compression of the internal aspect of the knee. While running in curve the landing is happening with the external aspect of his foot creating inconvenient loads at the ankle level.
Internal compression in the knee
Internal compression in the knee. Push-off with the external aspect of the foot
Landing with extended knee in front of the hip with external aspect of the heel
Mid-stand phase with the external aspect of the foot. Internal compression of the knee
Landing with extended knee in front of the hip with the heel


While batting, his left foot remains in the same position until the end of the body rotation creating a torque load at the left knee level.
Initial position
 
Hip rotation with not change in foot position. Torque at the knee level
Hip rotation with not change in foot position. Torque at the knee level


Conclusions: moderate risk of injury in the knees and ankles. Moderate risk of soft tissue injury in his legs.

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