School of Health Sports & Leisure, Republic Polytechnic, Singapore, Singapore.
Geriatric Education and Research Institute, Khoo Teck Puat Hospital, Singapore, Singapore.
Sports Biomech. 2022 Oct;21(9):981-992. doi: 10.1080/14763141.2020.1713206. Epub 2020 Mar 12.
This study investigated differences in joint loading during a side-step manoeuvre on artificial grass turfs with different infill depths. The kinematics and kinetics of 17 trained male inter-college soccer players performing the manoeuvre were captured using 10 high-speed optical cameras synchronised to a force-platform at sampling frequencies of 250 Hz and 1000 Hz respectively. Significantly larger lateral forces (GRF) ( = 0.036), larger anterior/posterior forces (GRF ( = 0.062) and larger vertical forces (GRF) ( = 0.390) suggests that turf with greater infill depths may be firmer. This could elicit greater stresses on the lower extremity, thereby increasing the risk of knee ligament injuries. Significant differences were reported only for ankle inversion angle ( = 0.001; ES = 0.74), inversion/eversion ankle moment ( = 0.039; ES = 0.52) and abduction-adduction ankle moment ( = 0.022; ES = 0.79) at GRFz. Lower extremity adaptations to execute the manoeuvre on turf with greater infill depths may have taken place at the ankle rather than the knee. While this change in technique may implicate injuries, greater infill depths can be counter-intuitive where a certain level of hardness in the artificial turf might be necessary which otherwise could affect the athletes' performance and potentially reduce injury risk.
本研究调查了在不同填充深度的人工草皮上进行侧步动作时关节受力的差异。17 名经过训练的男性大学生足球运动员在进行该动作时，使用 10 个高速光学摄像机和一个力台进行运动捕捉，采样频率分别为 250 Hz 和 1000 Hz。结果表明，侧向力（GRF）显著增大（=0.036），前/后向力（GRF）和垂直力（GRF）也显著增大（=0.062 和=0.390），这表明填充深度较大的草皮可能更硬。这可能会对下肢造成更大的压力，从而增加膝关节韧带受伤的风险。仅在 GRFz 处报告了踝关节内翻角度（=0.001；ES=0.74）、内翻/外翻踝关节力矩（=0.039；ES=0.52）和外展/内收踝关节力矩（=0.022；ES=0.79）存在显著差异。在填充深度较大的草皮上执行该动作时，下肢的适应可能发生在踝关节而不是膝关节。虽然这种技术变化可能暗示着受伤的风险，但在人工草皮上增加填充深度可能是反直觉的，因为需要一定程度的硬度，否则可能会影响运动员的表现，并可能降低受伤的风险。
