Int J Sports Physiol Perform. 2021 Apr 1;16(4):578-584. doi: 10.1123/ijspp.2020-0313. Epub 2021 Jan 31.
Previously, it has been shown that loaded warm-up (LWU) can improve change-of-direction speed (CODS) in professional badminton players. However, the effect of asymmetry on CODS in badminton players and the influence of LWU on asymmetry has not been examined.
A total of 21 amateur badminton players (age 29.5 [8.4] y, playing experience 8.4 [4.2] y) completed 2 trials. In the first, they performed a control warm-up. In the second, they performed the same warm-up but with 3 exercises loaded with a weight vest (LWU). Following both warm-ups, players completed single-leg countermovement jump and badminton-specific CODS tests.
No significant differences between control warm-up and LWU were observed for CODS, single-leg countermovement jump, or single-leg countermovement jump asymmetry. However, small effect sizes suggested faster CODS (mean difference: -5%; d = -0.32) and lower asymmetries (mean difference: -3%; d = -0.39) following LWU. Five players (24%) experienced CODS improvements greater than the minimum detectable change while 2 (10%) responded negatively. Asymmetry was not correlated with CODS following control warm-up (ρ = .079; P = .733) but was negatively associated with CODS after LWU (ρ = -.491; P = .035).
LWU may prove a strategy to trial on an individual basis, but generic recommendations should not be applied.
此前研究表明，负荷热身（LWU）可提高专业羽毛球运动员的变向速度（CODS）。然而，尚未研究羽毛球运动员 CODS 的不对称性以及 LWU 对不对称性的影响。
共有 21 名业余羽毛球运动员（年龄 29.5[8.4]岁，运动经验 8.4[4.2]岁）完成了 2 次试验。在第一次试验中，他们进行了常规热身；在第二次试验中，他们进行了相同的热身，但在 3 个练习中使用了负重背心（LWU）。在完成两种热身之后，运动员们分别进行了单腿反向跳和羽毛球专项 CODS 测试。
在 CODS、单腿反向跳或单腿反向跳不对称方面，常规热身和 LWU 之间没有显著差异。然而，较小的效应量表明 LWU 后 CODS 更快（平均差异：-5%；d = -0.32）且不对称性更低（平均差异：-3%；d = -0.39）。5 名运动员（24%）的 CODS 改善超过最小可检测变化，而 2 名运动员（10%）的 CODS 则下降。在常规热身后，不对称性与 CODS 无相关性（ρ=0.079；P=0.733），但在 LWU 后与 CODS 呈负相关（ρ=-0.491；P=0.035）。
LWU 可能被证明是一种基于个体的策略，但不应推广使用通用建议。
