Biomechanics Laboratory, Centre of Sports, Federal University of Santa Catarina, Florianópolis, Brazil.
School of Exercise and Nutrition Sciences, Faculty of Health, Queensland University of Technology, Brisbane, Australia.
Sports Biomech. 2023 Sep;22(9):1079-1094. doi: 10.1080/14763141.2020.1779335. Epub 2020 Jul 9.
This study aimed to analyse unilateral countermovement jumps (CMJ) performance and muscle soreness in lower limbs, as well as to compare lower limb asymmetry over 48h after a stretch-shortening cycle (SSC) fatigue protocol. Fourteen judo athletes performed unilateral CMJ on each leg before, and after the 5 and 10 sets over 24h and 48h of an SSC-fatigue protocol. The SSC protocol reduced CMJ performance after the 5 set and 10 sets, especially in the weaker limb (p < 0.05), but returned to the baseline values after 24h. Asymmetry increased for peak force, peak power, and mean power after the 5 set compared to the baseline (p < 0.05) and remained higher for peak force after the 10 set (p = 0.019), returning to the baseline values after 24h (p < 0.05). Soreness increased for the lower body at post, 24h, and 48h compared to the baseline (p < 0.05). In conclusion, a fatiguing SSC protocol can result in increased bilateral asymmetries in judo athletes, but after 24h and 48h of the protocol the bilateral asymmetry returned to the baseline values, with only muscle soreness still elevated.
本研究旨在分析单侧反跳式跳跃（CMJ）表现和下肢肌肉酸痛，并比较伸展-缩短循环（SSC）疲劳方案后 48 小时内下肢的不对称性。14 名柔道运动员在 SSC 疲劳方案的 24 小时和 48 小时内，完成 5 组和 10 组后，分别在每条腿上进行单侧 CMJ。SSC 方案在第 5 组和第 10 组后降低了 CMJ 表现，尤其是在较弱的腿部（p<0.05），但在 24 小时后恢复到基线值。与基线相比，第 5 组后，峰值力、峰值功率和平均功率的不对称性增加（p<0.05），第 10 组后峰值力的不对称性仍然更高（p=0.019），在 24 小时后恢复到基线值（p<0.05）。与基线相比，下半身在第 5 组后、24 小时和 48 小时时的酸痛增加（p<0.05）。总之，疲劳的 SSC 方案可能导致柔道运动员的双侧不对称性增加，但在 24 小时和 48 小时后，双侧不对称性恢复到基线值，只有肌肉酸痛仍然升高。
