Relationship between frontal plane knee kinematics and landing kinetics in a rebound jump

The rebound jump (RJ) is a mode of plyometric training that exploits a rapid cyclical muscle action known as the stretch-shortening cycle (SSC). Because landing from a rebound jump requires the athlete to modulate ground reaction forces of 3-14 times body weight, proper alignment and technique of the lower extremity are critical for performance and injury prevention. However, limited empirical evidence exists examining frontal plane kinematics of the RJ, specifically at the knee joint. Analyses revealed a significant correlation between frontal knee kinematics and contact time of the RJ, but not amortization force or kinetic energy upon landing (p ≥ 0.05). Frontal plane knee movement may not influence landing mechanics or performance of a rebound jump.