Zhu Ji, Li Ming, Wang Chengyun
School of Physical Education and Sports Science, Fujian Normal University, Fuzhou, 350117, Fujian, China.
Sci Rep. 2025 Jul 22;15(1):26610. doi: 10.1038/s41598-025-11196-3.
The purpose of this study was to examine the effects of a 6-week "staircase sprinting" (SS) with or without blood flow restriction (BFR) on body composition, anaerobic power, and leg muscle strength in physically inactive college students. Twenty-two physically inactive college students (11 males and 11 females) were randomly assigned to an experimental group (SS-BFR, n = 12) and a control group (SS, n = 10). Participants in both groups received SS snacks 3 days per week (3 times per day) for 6 weeks. The interval between each SS was greater than two hours. The SS-BFR group wore the BFR device during SS, which was measured using the estimated Arterial Occlusion Pressure(AOP). A 40% AOP was used in weeks 1-3 and increased to 50% AOP in weeks 4-6. Normal data were analyzed using one-way covariance analysis (ANCOVA), and non-normal data were analyzed using nonparametric ANCOVA (Quade's test). After the 6-week intervention, no intra- or inter-group differences in body composition were observed between the two groups (p > 0.05). Anaerobic power showed a significantly lower decrease in fatigue index (Pi) in the SS-BFR group than in the SS group (p = 0.047, ƞ²P = 0.191, 95% CI [0.075, 11.739]). However, no significant main effects were observed for peak power (PP), mean power (MP), and minimum power (MinP) between the groups (p > 0.05). The results of the isokinetic muscle strength test showed that, except for the right knee extensor muscle strength at 60 °/s, which exhibited a significant between-group difference (p = 0.033, F = 5.273), no other results demonstrated significant between-group main effects (p > 0.05). Surface electromyography (sEMG) results showed no significant between-group main effects for changes in vastus medialis (p = 0.093, ƞ²P = 0.141, 95% CI [-0.838, 9.965]) and vastus lateralis (p = 0.527, ƞ²P = 0.021, 95% CI [-5.629, 10.663]). Applying BFR during the SS period seems to enhance the participants' leg muscle strength and their ability to resist fatigue during anaerobic exercise. However, the effectiveness of this intervention must be determined in future studies, considering factors such as cuff pressure, gender and sample size.
本研究旨在探讨为期6周的“阶梯冲刺”（SS）训练，无论有无血流限制（BFR），对缺乏运动的大学生身体成分、无氧功率和腿部肌肉力量的影响。22名缺乏运动的大学生（11名男性和11名女性）被随机分为实验组（SS-BFR，n = 12）和对照组（SS，n = 10）。两组参与者每周3天（每天3次）接受SS训练，持续6周。每次SS训练之间的间隔时间大于两小时。SS-BFR组在SS训练期间佩戴BFR装置，该装置使用估计的动脉闭塞压力（AOP）进行测量。第1-3周使用40%的AOP，第4-6周增加到50%的AOP。正态数据采用单因素协方差分析（ANCOVA）进行分析，非正态数据采用非参数ANCOVA（Quade检验）进行分析。经过6周的干预，两组之间在身体成分方面未观察到组内或组间差异（p>0.05）。无氧功率方面，SS-BFR组的疲劳指数（Pi）下降幅度明显低于SS组（p = 0.047，ƞ²P = 0.191，95%CI [0.075, 11.739]）。然而，两组之间在峰值功率（PP）、平均功率（MP）和最小功率（MinP）方面未观察到显著的主效应（p>0.05）。等速肌力测试结果显示，除了60°/s时右膝伸肌力量存在显著的组间差异（p = 0.033，F = 5.273）外，其他结果均未显示出显著的组间主效应（p>0.05）。表面肌电图（sEMG）结果显示，股内侧肌（p = 0.093，ƞ²P = 0.141，95%CI [-0.838, 9.965]）和股外侧肌（p = 0.527，ƞ²P = 0.021，95%CI [-5.629, 10.663]）变化的组间主效应不显著。在SS训练期间应用BFR似乎可以增强参与者的腿部肌肉力量以及他们在无氧运动中的抗疲劳能力。然而，考虑到袖带压力、性别和样本量等因素，这种干预的有效性必须在未来的研究中加以确定。
