Test-retest reliability and comparison of portable Kinvent force platform with contact mat and video-based software for measuring countermovement jump height

The countermovement jump (CMJ) is one of the most common tests used by practitioners to assess lower-body explosive capacities. This study aimed to (a) assess the test-retest reliability of the portable K-Deltas force platforms to measure the CMJ height and (b) to compare the force platform-derived jump height to the contact mat (Chronojump, Spain) and a video-based software (My Jump app).