Saadat Shekoofe, Bricarell Katherine M, Gillette Jason C
Department of Kinesiology, Iowa State University, Ames, IA, USA.
Sports Biomech. 2023 Oct 26:1-14. doi: 10.1080/14763141.2023.2271888.
ACL injuries are common among athletes playing team sports. The impact of divided attention during team sports on landing mechanics is unclear. Twenty-one healthy females jumped at a 60° angle to their right and performed a second jump to their right or left at a 60° angle. The direction of the second jump was shown before movement (baseline) or mid-flight of the first jump (dual task). The signal for the dual-task conditions showed five arrows and the middle one indicated the jump direction (Flanker paradigm). The other arrows pointed in the same (congruent) or the opposite (incongruent) direction as the middle arrow. Results indicated larger initial and peak knee flexion angles, smaller peak knee valgus moments, and smaller vertical and posterior GRFs during baseline right jumps compared to other conditions. Peak posterior GRF was increased in the incongruent condition compared to the congruent condition during left jumps. Performance was decreased with longer stance times for the dual task compared to the baseline in both jump directions. Further, the incongruent condition had a longer stance time than the congruent condition during left jumps. More research focusing on decision-making with more challenging visual stimuli mimicking dynamic team sports is merited.
前交叉韧带损伤在从事团队运动的运动员中很常见。团队运动中注意力分散对落地力学的影响尚不清楚。21名健康女性以60°角向右跳跃，然后以60°角向右或向左进行第二次跳跃。第二次跳跃的方向在动作前（基线）或第一次跳跃的飞行过程中（双重任务）显示。双重任务条件的信号显示五个箭头，中间的箭头指示跳跃方向（侧翼范式）。其他箭头与中间箭头指向相同（一致）或相反（不一致）的方向。结果表明，与其他条件相比，基线向右跳跃时初始和峰值屈膝角度更大，峰值膝外翻力矩更小，垂直和后向地面反作用力更小。与一致条件相比，在向左跳跃时，不一致条件下的后向地面反作用力峰值增加。与基线相比，在两个跳跃方向上，双重任务的站立时间更长时，表现都会下降。此外，在向左跳跃时，不一致条件下的站立时间比一致条件下更长。值得进行更多研究，关注在模拟动态团队运动的更具挑战性视觉刺激下的决策。
