Abstract
This study compared the kinetic and kinematic variables measured by a three-dimensional markerless motion capture system (MCS) to identify alterations in lower-extremity performance following vertical jump (VJ) and sprint anaerobic fatiguing tasks. Eleven females (±SD; 20.8±1.1 years, 72.2±7.4 cm, 68.0±7.2 kg) and eleven males (23.0±2.6 years., 180.3±4.8 cm, 80.4±7.3 kg) volunteered to participate in the present investigation. Participants were screened using the Functional Motion Analysis (FMA) protocol, consisting of 19 full-body motions, from which algorithm-derived scores were calculated [i.e. composite, power, functional strength, dysfunction, vulnerability, and exercise readiness score (ERS)] pre- and post-fatiguing tests. Each participant completed one familiarization session and three randomized acute fatiguing protocols [i.e. control, repeated vertical jump test (RVJT), 25-second resisted sprint test]. The repeated measures MANOVA indicated a statistically significant three-way interaction (score x condition x time). Follow-up analyses indicated differences between pre- and post-tests in composite score (1556.43±307.8; 1368.00±264.62), power score (813.34±242.39; 687.32±164.83), and ERS (18.16±4.75; 16.02±3.54) during the RVJT experimental sessions, respectively. The FMA scores suggested decrements in performance are first observed in the decreases in power production during high velocity movements (i.e., RVJTs), and the viability of a MCS to evaluate biomechanical alterations following fatiguing tasks.
Published Version
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