1. Acute kinematics and kinetics changes to wearable resistance during change of direction among soccer players.
- Author
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Li, Xueliang, Li, Chunman, Cui, Yixiong, and Wong, Del P.
- Subjects
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LEG physiology , *SOCCER , *RANGE of motion of joints , *ANALYSIS of variance , *CROSS-sectional method , *ATHLETES , *WEARABLE technology , *DYNAMICS , *REPEATED measures design , *DESCRIPTIVE statistics , *STATISTICAL sampling , *MOTION capture (Human mechanics) , *BIOMECHANICS , *DATA analysis software , *KINEMATICS , *WEIGHT-bearing (Orthopedics) , *MOTOR ability , *CLOTHING & dress , *GROUND reaction forces (Biomechanics) - Abstract
This study determined the acute changes in kinematics and kinetics when an additional load equivalent to 5% body mass was attached to the torso during change of direction (COD). In this within-subject repeated measures study, 14 male soccer players (age: 18.29 ± 0.32 years) volunteered to participate. Subjects performed COD under two conditions in randomized order: (1) no WR, and (2) with WR. No significant differences between the loaded and unloaded conditions in actual COD angle, approach speed, braking time, propulsive time, contact time, COD completion time (all p > 0.05, ES = 0.05–0.11), and all measured kinematic parameters (all p > 0.05, ES = 0–0.18). Nonetheless, ankle plantar/dorsi flexion ROM had possibly small increase in the loaded condition (ES = 0.24). Kinetics analysis has shown that the loaded condition was likely to have small increase in relative peak vertical propulsive ground reaction force (GRF, p = 0.11, ES = 0.41), and possible small increases in relative peak braking GRF (vertical: p = 0.21, ES = 0.42; total: p = 0.22, ES = 0.38), relative peak total propulsive GRF (p = 0.24, ES = 0.26), and relative braking impulse (horizontal, vertical, and total; p = 0.27–0.41, ES = 0.26–0.28). WR did not significantly change the acute movement techniques, meanwhile induced small increases in important kinetic stimuli for potential adaptation in COD. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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