Zuo Chongwen, Bo Shumin, Li Qing, Zhang Li
Graduate Department of Capital University of Physical Education and Sports, Beijing, China.
School of Kinesiology and Health of Capital University of Physical Education and Sports, Beijing, China.
Front Physiol. 2022 May 25;13:888048. doi: 10.3389/fphys.2022.888048. eCollection 2022.
Resistance training-induced changes in the muscle function is essential for the health promotion of the young and older, but the discrepancies of the effect of resistance training on arterial stiffness leads to the divergence regarding to the effect of resistance training on cardiovascular health. What confuses our understanding in this field may be the following factors: external load (higher intensity vs. lighter intensity), participants' cardiovascular health, and arterial stiffness assessment measurement. The purpose of the present study was to investigate the effects of the whole-body traditional high-intensity vs. functional low-intensity resistance training protocol on systemic arterial stiffness, and their association with muscular fitness components in untrained young men. In this randomized controlled trial, twenty-nine untrained young men (mean age about 22.5 years old) were randomized into a 6-weeks (three sessions per week) supervised whole-body traditional high-intensity resistance group (TRT, = 15) consisting of 4-5 sets of 12 repetitions (70%1RM, lower-repetitions) or a whole-body functional low-intensity resistance group (FRT, = 14) with 4-5 sets of 20 repetitions (40%1RM, higher-repetitions) to volitional failure. The systemic arterial stiffness (cardio-ankle vascular index, CAVI) and muscular fitness components were assessed before and after the 6-weeks training program. There was a significant decrease (pre-post) for CAVI only in FRT group ( < 0.05), but no significant difference was observed between two groups. In addition, the TRT and FRT groups showed equally significantly increased in maximal strength, muscular endurance and power (within group: both < 0.01); however, the independent test exhibited that the difference between two groups in terms of change in maximal strength, muscular endurance and power were no significant ( > 0.05). Furthermore, the reduction in CAVI was negatively correlated with the increase in 1RM of bench press for all participants (r = -0.490, < 0.01). Using present criterion-standard assessments measurements demonstrates that CAVI was significantly reduced after 6-weeks functional resistance training with beneficial effect on muscular fitness. Negative and significant association between CAVI and 1RM bench press indicated the cardiovascular health may be involved in the regulation of resistance training.
抗阻训练引起的肌肉功能变化对年轻人和老年人的健康促进至关重要，但抗阻训练对动脉僵硬度影响的差异导致了关于抗阻训练对心血管健康影响的分歧。在该领域困扰我们理解的可能是以下因素：外部负荷（高强度与低强度）、参与者的心血管健康状况以及动脉僵硬度评估测量方法。本研究的目的是调查全身传统高强度与功能性低强度抗阻训练方案对全身动脉僵硬度的影响，以及它们与未经训练的年轻男性肌肉适能成分的关联。在这项随机对照试验中，29名未经训练的年轻男性（平均年龄约22.5岁）被随机分为一个为期6周（每周3次训练）的全身传统高强度抗阻训练组（TRT，n = 15），该组进行4 - 5组，每组12次重复（70%1RM，低重复次数），或一个全身功能性低强度抗阻训练组（FRT，n = 14），进行4 - 5组，每组20次重复（40%1RM，高重复次数），直至自愿力竭。在为期6周的训练计划前后评估全身动脉僵硬度（心踝血管指数，CAVI）和肌肉适能成分。仅FRT组的CAVI有显著下降（训练前后比较）（P < 0.05），但两组间未观察到显著差异。此外，TRT组和FRT组的最大力量、肌肉耐力和功率均有同等显著增加（组内：均P < 0.01）；然而，独立t检验显示两组在最大力量、肌肉耐力和功率变化方面的差异不显著（P > 0.05）。此外，所有参与者的CAVI降低与卧推1RM的增加呈负相关（r = -0.490，P < 0.01）。使用当前的标准评估测量方法表明，6周的功能性抗阻训练后CAVI显著降低，对肌肉适能有有益影响。CAVI与卧推1RM之间的负向显著关联表明心血管健康可能参与抗阻训练的调节。
