Video acoustical method and system for determining an impact point of a thrown body on a landing area

Takeoff point marker assembly

Arcuate motion apparatus and method

Method and system to analyze sports motions using motion sensors of a mobile device

Method and system to analyze sports motions using motion sensors of a mobile device

ATHLETIC RANKING SYSTEM

Exercise/stretching apparatus

Method and measuring device for motional performance

Device to measure acceleration and deceleration of hip rotation

System and method for tracking identity movement and location of sports objects