Graduate Institute of Athletics and Coaching Science, National Taiwan Sport University, Taoyuan 333, Taiwan.
Department of Athletic Training and Health, National Taiwan Sport University, Taoyuan 333, Taiwan.
Int J Environ Res Public Health. 2022 Dec 18;19(24):17008. doi: 10.3390/ijerph192417008.
This study focused on the effect of acute Judo training on countermovement jump (CMJ) performance and perceived fatigue among a group of highly trained collegiate judo athletes. Twenty male judo athletes participated in this study (age: 20.65 ± 1.22 years, weight: 84.17 ± 28.45 kg). Participants were assessed for CMJperformance changes before, immediately after (0 h), 12 h after, and 24 h after judo training (JT) using unloaded CMJ(CMJ) and loaded CMJ(CMJ). All the jumps were performed on a force plate, and the force-time curves were collected for further analysis. Respondents' perceptions were evaluated using the modified rating of perceived exertion (mRPE) before, after (0 h), 12 h, and 24 h after JT. CMJparameters were analyzed at four measured points using a one-way repeated analysis of variance. Effect sizes (ES) and percentage changes before versus 24 h after JT were calculated for comparison. Associations between the CMJparameters and mRPE were analyzed using the Pearson product-moment correlation. The ratio of flight time to contact time significantly decreased, whereas the eccentric duration, concentric duration, and total duration significantly increased ( < 0.05) in both CMJs 24 h after JT. Compared with CMJ, CMJ had a significantly lower ( < 0.05) flight time, jump height, peak velocity, and peak power. The mRPE and CMJ peak velocity showed moderate- to high-level negative correlation results both 0 and 24 h after training ( = -0.543, < 0.05; = -0.479, < 0.05). In this study, we only observed the effect of fatigue on the neuromuscular (NM) system 24 h after JT. CMJ height may help to better determine fatigue state compared with CMJ. According to the results, the neuromuscular effects of fatigue were not observed until 24 h after a single high-intensity training. Therefore, when arranging high-intensity special training or strength and conditioning training, one should reduce the volume of training appropriately to avoid fatigue accumulation and reduce the risk of sports injuries.
本研究关注的是急性柔道训练对一组高水平大学柔道运动员的反跳（CMJ）表现和感知疲劳的影响。20 名男性柔道运动员参与了这项研究（年龄：20.65±1.22 岁，体重：84.17±28.45 公斤）。参与者在进行柔道训练（JT）之前、之后即刻（0 小时）、12 小时后和 24 小时后，使用无负荷 CMJ（CMJ）和负荷 CMJ（CMJ）进行 CMJ 表现变化评估。所有跳跃均在测力板上进行，收集力-时间曲线进行进一步分析。使用改良的感知用力评分（mRPE）在 JT 之前、之后即刻（0 小时）、12 小时和 24 小时评估受访者的感知。使用单向重复方差分析分析四个测量点的 CMJ 参数。计算 JT 前后 24 小时的效应大小（ES）和百分比变化进行比较。使用 Pearson 积矩相关分析分析 CMJ 参数与 mRPE 之间的关系。在 JT 后 24 小时，飞行时间与接触时间的比值显著降低，而离心持续时间、向心持续时间和总持续时间显著增加（<0.05）。与 CMJ 相比，CMJ 的飞行时间、跳跃高度、峰值速度和峰值功率明显较低（<0.05）。mRPE 和 CMJ 峰值速度在训练后 0 小时和 24 小时均显示出中等至高强度的负相关结果（= -0.543，<0.05；= -0.479，<0.05）。在这项研究中，我们仅观察到 JT 后 24 小时疲劳对神经肌肉（NM）系统的影响。与 CMJ 相比，CMJ 高度可能有助于更好地确定疲劳状态。根据结果，单次高强度训练后 24 小时才观察到疲劳的神经肌肉效应。因此，在安排高强度专项训练或力量和体能训练时，应适当减少训练量，避免疲劳积累，降低运动损伤风险。
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