Countermovement Jump Recovery in Professional Soccer Players Using an Inertial Sensor.

Purpose: To assess the utility of an inertial sensor for assessing recovery in professional soccer players.

Methods: In a randomized, crossover design, 11 professional soccer players wore shorts fitted with phase change material (PCM) cooling packs or uncooled packs (control) for 3 h after a 90-min match. Countermovement jump (CMJ) performance was assessed simultaneously with an inertial sensor and an optoelectric system: prematch and 12, 36, and 60 h postmatch.