Jump Height
Subjects performed 3 countermovement jumps in the fatigued and unfatigued states. Subjects were asked to start the movement in an upright standing position, then to drop down to a volitional depth and to jump as high as possible. All jumps were performed with the hands held akimbo to limit any upper-extremity influence on the jumps. Three maximum jumps were recorded in the unfatigued state and in the fatigued state. Vertical jump performance was analyzed using a calibrated force plate (Leonardo Mechanograph GRFP LT; Novotec Medical). Jump height was calculated from takeoff velocity through the impulse momentum method. The mean of the 3 jumps per physiological state (unfatigued vs. fatigued) was used for data analysis.