Martini Alex D, Dalleck Lance C, Mejuto Gaizka, Larwood Trent, Weatherwax Ryan M, Ramos Joyce S
SHAPE Research Centre, Caring Futures Institute, Clinical Exercise Physiology, College of Nursing and Health Sciences, Flinders University, Adelaide, SA 5042, Australia.
Recreation, Exercise, and Sport Science Department, Western Colorado University, Gunnison, CO 81231, USA.
Int J Environ Res Public Health. 2022 Mar 26;19(7):3962. doi: 10.3390/ijerph19073962.
The second ventilatory threshold (VT) is established as an important indicator of exercise intensity tolerance. A higher VT allows for greater duration of higher intensity exercise participation and subsequently greater reductions in cardiovascular disease (CVD) risk. This study aimed to compare the efficacy of standardised and individualised exercise prescription on VT among physically inactive adults. Forty-nine physically inactive male and female participants (48.6 ± 11.5 years) were recruited and randomised into a 12-week standardised ( = 25) or individualised ( = 24) exercise prescription intervention. The exercise intensity for the standardised and individualised groups was prescribed as a percentage of heart rate reserve (HRR) or relative to the first ventilatory threshold (VT) and VT, respectively. Participants were required to complete a maximal graded exercise test at pre-and post-intervention to determine VT and VT. Participants were categorised as responders to the intervention if an absolute VT change of at least 1.9% was attained. Thirty-eight participants were included in the analysis. A significant difference in VT change was found between individualised (pre vs. post: 70.6% vs. 78.7% maximum oxygen uptake (VOmax)) and standardised (pre vs. post: 72.5% vs. 72.3% VOmax) exercise groups. Individualised exercise prescription was significantly more efficacious ( = 0.04) in eliciting a positive response in VT (15/19, 79%) when compared to the standardised exercise group (9/19, 47%). Individualised exercise prescription appears to be more efficacious than standardised exercise prescription in eliciting a positive VT change among physically inactive adults. Increasing VT allows for greater tolerance to higher exercise intensities and therefore greater cardiovascular health outcomes.
第二通气阈值（VT）被确立为运动强度耐受性的一项重要指标。较高的VT能使更高强度运动参与的持续时间更长，进而能更大程度地降低心血管疾病（CVD）风险。本研究旨在比较标准化运动处方和个体化运动处方对缺乏运动的成年人VT的影响。招募了49名缺乏运动的男性和女性参与者（48.6±11.5岁），并将他们随机分为12周的标准化运动处方组（n = 25）或个体化运动处方组（n = 24）进行干预。标准化组和个体化组的运动强度分别规定为心率储备（HRR）的百分比或相对于第一通气阈值（VT1）和第二通气阈值（VT2）。参与者需要在干预前后完成一次最大分级运动测试，以确定VT1和VT2。如果VT的绝对变化至少达到1.9%，则将参与者归类为对干预有反应者。38名参与者纳入分析。个体化运动组（干预前与干预后：最大摄氧量（VO₂max）的70.6%对78.7%）和标准化运动组（干预前与干预后：VO₂max的72.5%对72.3%）在VT变化方面存在显著差异。与标准化运动组（9/19，47%）相比，个体化运动处方在引发VT的阳性反应方面显著更有效（P = 0.04）（15/19，79%）。在缺乏运动的成年人中，个体化运动处方在引发阳性VT变化方面似乎比标准化运动处方更有效。提高VT能使对更高运动强度具有更大的耐受性，从而带来更好的心血管健康结果。
