Koyama Takeshi, Rikukawa Akira, Nagano Yasuharu, Sasaki Shogo, Ichikawa Hiroshi, Hirose Norikazu
Int J Sports Physiol Perform. 2022 Jan 1;17(1):16-21. doi: 10.1123/ijspp.2020-0963. Epub 2021 Jun 29.
To evaluate the effect of the number of high-acceleration movements on muscle damage and the rating of perceived exertion (RPE) in basketball games.
Twenty-one male collegiate basketball players (mean age, 20.0 [1.0] y) were included. A triaxial accelerometer was used to measure acceleration in basketball-simulated scrimmages. To detect higher physical load during the actual game, the resultant acceleration was calculated, and 3 thresholds were set: >4G, >6G, and >8G resultant accelerations. The number of the extracted movements was calculated at each acceleration threshold. Plasma creatine kinase (CK) levels (marker of muscle damage) were estimated before and 24 hours after the match, and the session-RPE load was calculated within 30 minutes after the match. Pearson product-moment correlations with 95% confidence intervals were used to determine the relationships between the number of high-acceleration movements and plasma CK and session-RPE load.
Significant correlations were observed between the number of high-acceleration movements >8G and CK level (r = .74; 95% confidence interval, 0.44-0.89; P < .0001). Furthermore, the correlation coefficient between acceleration and CK increased with increased acceleration threshold (>4G: r = .65; >6G: r = .69). Contrastingly, the correlation coefficient between acceleration and the session-RPE load decreased with increased acceleration threshold (>4G: r = .72; >6G: r = .52; >8G: r = .43).
The session-RPE reflects the total amount of movement, while the high-acceleration movement reflects the momentary large impact load or intensity, and they evaluated different factors. Basketball coaching and conditioning professionals recommended combining acceleration and session-RPE when monitoring the load of athletes.
评估篮球比赛中高加速动作的数量对肌肉损伤及主观用力程度分级（RPE）的影响。
纳入21名男性大学篮球运动员（平均年龄20.0[1.0]岁）。使用三轴加速度计测量篮球模拟对抗赛中的加速度。为检测实际比赛期间更高的身体负荷，计算合成加速度，并设置3个阈值：合成加速度>4G、>6G和>8G。计算每个加速度阈值下提取动作的数量。在比赛前和比赛后24小时估算血浆肌酸激酶（CK）水平（肌肉损伤标志物），并在比赛后30分钟内计算单次训练RPE负荷。采用具有95%置信区间的Pearson积矩相关性分析来确定高加速动作数量与血浆CK及单次训练RPE负荷之间的关系。
观察到合成加速度>8G的高加速动作数量与CK水平之间存在显著相关性（r = 0.74；95%置信区间，0.44 - 0.89；P < 0.0001）。此外，加速度与CK之间的相关系数随加速度阈值的增加而增加（>4G：r = 0.65；>6G：r = 0.69）。相反，加速度与单次训练RPE负荷之间的相关系数随加速度阈值的增加而降低（>4G：r = 0.72；>6G：r = 0.52；>8G：r = 0.43）。
单次训练RPE反映运动总量，而高加速动作反映瞬间的大冲击负荷或强度，它们评估的是不同因素。篮球教练和体能训练专业人员建议在监测运动员负荷时将加速度和单次训练RPE结合起来。
