Sculthorpe Nicholas F, Herbert Peter, Grace Fergal
Institute of Clinical Exercise & Health Sciences, School of Science and Sport, University of the West of Scotland, Hamilton, South Lanarkshire, Scotland, UK University of Wales Trinity Saint David, Camarthen Campus, Camarthen, Wales, UK Faculty of Health, Federation University Australia, Mt Helen Campus, Mt Helen, Victoria, Australia.
Medicine (Baltimore). 2017 Feb;96(6):e6040. doi: 10.1097/MD.0000000000006040.
Declining muscle power during advancing age predicts falls and loss of independence. High-intensity interval training (HIIT) may improve muscle power, but remains largely unstudied in ageing participants.
This randomized controlled trial (RCT) investigated the efficacy of a low-frequency HIIT (LfHIIT) intervention on peak muscle power (peak power output [PPO]), body composition, and balance in lifelong sedentary but otherwise healthy males.
Thirty-three lifelong sedentary ageing men were randomly assigned to either intervention (INT; n = 22, age 62.3 ± 4.1 years) or control (n = 11, age 61.6 ± 5.0 years) who were both assessed at 3 distinct measurement points (phase A), after 6 weeks of conditioning exercise (phase B), and after 6 weeks of HIIT once every 5 days in INT (phase C), where control remained inactive throughout the study.
Static balance remained unaffected, and both absolute and relative PPO were not different between groups at phases A or B, but increased significantly in INT after LfHIIT (P < 0.01). Lean body mass displayed a significant interaction (P < 0.01) due to an increase in INT between phases B and C (P < 0.05).
6 weeks of LfHIIT exercise feasible and effective method to induce clinically relevant improvements in absolute and relative PPO, but does not improve static balance in sedentary ageing men.
随着年龄增长，肌肉力量下降预示着跌倒和失去独立生活能力。高强度间歇训练（HIIT）可能会改善肌肉力量，但在老年参与者中仍未得到充分研究。
这项随机对照试验（RCT）研究了低频HIIT（LfHIIT）干预对终生久坐但身体健康的男性的峰值肌肉力量（峰值功率输出[PPO]）、身体成分和平衡能力的影响。
33名终生久坐的老年男性被随机分为干预组（INT；n = 22，年龄62.3±4.1岁）或对照组（n = 11，年龄61.6±5.0岁），两组均在3个不同测量点（A阶段）、6周的适应性锻炼后（B阶段）以及INT组每5天进行一次HIIT锻炼6周后（C阶段）进行评估，对照组在整个研究过程中保持不活动状态。
静态平衡未受影响，在A阶段或B阶段，两组之间的绝对和相对PPO没有差异，但INT组在进行LfHIIT后显著增加（P < 0.01）。由于INT组在B阶段和C阶段之间有所增加（P < 0.05），瘦体重显示出显著的交互作用（P < 0.01）。
6周的LfHIIT锻炼是一种可行且有效的方法，可在临床上显著改善绝对和相对PPO，但不能改善久坐老年男性的静态平衡。
