Leahy Daniel J, Dalleck Lance C, Ramos Joyce S
Caring Futures Institute, SHAPE Research Centre, Clinical Exercise Physiology, College of Nursing and Health Sciences, Flinders University, Adelaide, SA, Australia.
Recreation, Exercise and Sport, Western Colorado University, Gunnison, CO, United States.
Front Sports Act Living. 2022 Aug 5;4:961957. doi: 10.3389/fspor.2022.961957. eCollection 2022.
Many adults do not reach the recommended exercise participation guidelines, often citing lack of time as a barrier. Reduced exertion high-intensity training (REHIT) is a mode of exercise that takes as few as 10 min and has been shown to be as effective as other modalities. The Fitness Fatness Index (FFI) is a recently developed index that is used to predict cardiovascular disease (CVD) risk. The aim of this study was to determine the efficacy of a REHIT vs. a traditional moderate-intensity continuous training (MICT) on FFI in physically inactive adults.
Thirty-two participants were randomized into one of two 8-week exercise intervention groups: (i) REHIT ( = 16); (ii) MICT ( = 16). The REHIT group performed 10 min of individualized cycling intervals on 2-4 days of the week. The MICT group were prescribed aerobic exercise at 50-65% of their heart rate reserve (HRR) on 3-5 days of the week. FFI was recorded at baseline and post 8-weeks, with FFI being calculated as cardiorespiratory fitness (CRF) (expressed as metabolic equivalents) divided by waist to height ratio (WtHR). A 1-unit increase in FFI was recognized as a clinically significant change in FFI.
The REHIT group showed significantly greater (+1.95, ±0.63) improvements in FFI compared to those in the MICT (+0.99, ±0.47) group (between group difference, < 0.001). Furthermore, there was a greater proportion of participants who achieved a clinically significant change in FFI in the REHIT group (12/12, 100%) than in the MICT group (8/15, 53%) (between group difference, = 0.01).
This study suggests that REHIT may be a more efficacious exercise modality to increase FFI than MICT. This outcome is beneficial as the clinician can prescribe REHIT to physically inactive adults who cite lack of time as a barrier to physical activity participation and achieve significant reductions in CVD risk.
许多成年人未达到推荐的运动参与指南，常称缺乏时间是一个障碍。低强度高强度训练（REHIT）是一种运动模式，只需10分钟，且已被证明与其他运动方式同样有效。健身肥胖指数（FFI）是最近开发的一种用于预测心血管疾病（CVD）风险的指数。本研究的目的是确定REHIT与传统中等强度持续训练（MICT）对缺乏运动的成年人的FFI的疗效。
32名参与者被随机分为两个为期8周的运动干预组之一：（i）REHIT组（n = 16）；（ii）MICT组（n = 16）。REHIT组每周2 - 4天进行10分钟的个性化骑行间歇训练。MICT组被规定每周3 - 5天进行心率储备（HRR）50 - 65%的有氧运动。在基线和8周后记录FFI，FFI的计算方法是心肺适能（CRF）（以代谢当量表示）除以腰高比（WtHR）。FFI增加1个单位被认为是FFI临床上的显著变化。
与MICT组（+0.99，±0.47）相比，REHIT组的FFI改善显著更大（+1.95，±0.63）（组间差异，P < 0.001）。此外，REHIT组中达到FFI临床显著变化的参与者比例（12/12，100%）高于MICT组（8/15，53%）（组间差异，P = 0.01）。
本研究表明，与MICT相比，REHIT可能是一种更有效的增加FFI的运动方式。这一结果是有益的，因为临床医生可以为那些称缺乏时间是参与体育活动障碍的缺乏运动的成年人开具REHIT处方，并显著降低CVD风险。
