Wang Zimin, Taniguchi Masashi, Saeki Junya, Ichihashi Noriaki
Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan.
Japan Society for the Promotion of Science, Tokyo, Japan.
Sports Health. 2025 May-Jun;17(3):637-645. doi: 10.1177/19417381241257181. Epub 2024 Jun 12.
Improving muscle quality to prevent and treat muscle dysfunction is critical. However, effective measures to improve muscle quality remain poorly understood. We investigated the effects of high- and low-velocity resistance training (RT) on muscle quality, mass, and function before and after an 8-week intervention.
High-velocity RT would improve muscle quality more effectively than low-velocity RT.
Randomized controlled trial.
Level 1.
A total of 33 healthy young women (23.1 ± 2.2 years) were assigned randomly to high-velocity (n = 16) or low-velocity (n = 17) groups. Both groups underwent concentric knee extension RT with a 60% 1-repetition maximum (1RM) load, performing 10 repetitions of 4 sets, 3 times per week for 8 weeks. The high-velocity group was instructed to complete each repetition as quickly as possible (mean repetition duration of 0.5 seconds), while the low-velocity group was required to execute each repetition in 3 seconds. Before and after the 8-week intervention, quadriceps femoris echo intensity (EI), muscle thickness (MT), isokinetic peak torque (60 and 300 deg/s), rate of velocity development (RVD) at 300 deg/s, and 1RM were assessed. Split-plot factorial design analysis of variance was used to compare the group × time interaction.
A group×time interaction was observed for EI ( < 0.01). Only the high-velocity group showed a significant reduction in EI after the intervention. MT revealed a main effect of time ( < 0.01), with both groups significantly increasing MT. RVD showed a group × time interaction ( < 0.05), with significant increase only in the high-velocity group. Isokinetic peak torque and 1RM showed main effects of time ( < 0.01), with significant increases in both groups.
High-velocity RT may be superior to low-velocity RT in enhancing muscle quality and RVD.
These results emphasize the importance of RT velocity for muscle quality improvement.
改善肌肉质量以预防和治疗肌肉功能障碍至关重要。然而，改善肌肉质量的有效措施仍知之甚少。我们研究了8周干预前后高速和低速阻力训练（RT）对肌肉质量、肌肉量和肌肉功能的影响。
高速阻力训练比低速阻力训练能更有效地改善肌肉质量。
随机对照试验。
1级。
总共33名健康年轻女性（23.1±2.2岁）被随机分为高速组（n = 16）或低速组（n = 17）。两组均采用60%的1次重复最大负荷（1RM）进行向心式膝关节伸展阻力训练，每组进行4组，每组10次重复，每周3次，共8周。高速组被要求尽快完成每次重复（平均重复持续时间为0.5秒），而低速组则被要求在3秒内完成每次重复。在8周干预前后，评估股四头肌回声强度（EI）、肌肉厚度（MT）、等速峰值扭矩（60和300度/秒）、300度/秒时的速度发展速率（RVD）和1RM。采用裂区析因设计方差分析来比较组×时间交互作用。
观察到EI存在组×时间交互作用（<0.01）。仅高速组在干预后EI显著降低。MT显示出时间的主效应（<0.01），两组MT均显著增加。RVD显示出组×时间交互作用（<0.05），仅高速组显著增加。等速峰值扭矩和1RM显示出时间的主效应（<0.01），两组均显著增加。
在提高肌肉质量和RVD方面，高速阻力训练可能优于低速阻力训练。
这些结果强调了阻力训练速度对改善肌肉质量的重要性。
