Changes in Joint Power and Energetics during a Sport-Specific Jumping Fatigue Protocol

Kinematic and kinetic changes in the lower extremities occur as an athlete becomes fatigued during vertical jumping; however, specifics of these are not well-understood. Therefore, purpose this study was to quantify influence a sport-specific, jumping fatigue protocol on biomechanics ankle, knee, hip joint. Twenty male varsity athletes performed repetitive standing countermovement squat jumps every 20 s until (vertical jump reach height decreased 88% their maximum for three consecutive jumps). The kinematics kinetics (ankle, hip) were quantified, joint’s moments, angular velocity, joint power compared. participants average 175 before they classified being fatigued. When became fatigued, peak ankle joints substantially reduced due decrease velocity at both joints. Ankle moments unchanged. Peak knee also unchanged over course protocol. To maintain performance game or delay fatigue, training should be targeted maintaining