Ahmadi Matthew N, Holtermann Andreas, Tudor-Locke Catrine, Koster Annemarie, Johnson Nathan, Chau Josephine, Wei L E, Sabag Angelo, Maher Carol, Thøgersen-Ntoumani Cecilie, Stamatakis Emmanuel
National Research Centre for the Working Environment, Copenhagen, DENMARK.
College of Health and Human Services, University of North Carolina Charlotte, Charlotte, NC.
Med Sci Sports Exerc. 2024 Dec 1;56(12):2413-2420. doi: 10.1249/MSS.0000000000003521. Epub 2024 Aug 19.
Vigorous intermittent lifestyle physical activity (VILPA) are bursts of incidental vigorous activity that occur during day-to-day activities outside of the exercise-domain. Vigorous intermittent lifestyle physical activity has shown promise in lowering risk of mortality and chronic disease. However, there is an absence of an empirically derived definition. Using physiological and effort-based metrics commonly used to define vigorous intensity, we investigated the minimum time needed to elicit physiological and perceived exertion responses to standardized activities of daily living.
Seventy adults (age = 58.0 ± 9.6 yr; 35 female) completed 9 VILPA activities of daily living in a randomized order, which included fast walking, fast incline walking, stair climbing, stationary cycling, and carrying external weight equal to 5% and 10% of body weight. Metabolic rate (by continuous indirect calorimetry), heart rate (telemetry) and perceived effort (Borg Scale) were measured during exercise. Time to reach VILPA was assessed using %V̇O 2max , %HRmax, and rating of perceived exertion thresholds.
The mean time to elicit VILPA ranged from 65 to 95 s (mean ± sd = 76.7 ± 3.8 s) for %V̇O 2max , 68 to 105 s (mean ± sd = 82.8 ± 6.8 s) for %HRmax, and 20 to 60 s (mean ± sd = 44.6 ± 6.7 s) for rating of perceived exertion. For each of the three indices, there was no difference in the time to elicit VILPA responses by sex or age ( P > 0.08), and times were also consistent between activities of daily living tasks. For example, for females and males, the average time to elicit vigorous responses while walking on a flat surface was 85.8 s (±16.9 s) and 80 s (±13.9 s), respectively, and for stair climbing while carrying 10% of body weight the duration was 78.4 s (±17.6 s) and 76.9 (±17.7 s).
When participants undertook activities of daily living, VILPA elicited a physiological response at an average of 77 to 83 s for %V̇O 2max and %HRmax, and 45 s for perceived exertion. The absence of a difference in the time to reach VILPA between sex and age suggests that a consistent behavioral VILPA translation can be used in interventions and population-based studies designed to assess the health effects of incidental physical activity.
剧烈间歇性生活方式体力活动（VILPA）是指在日常活动中、非运动领域所发生的突发性剧烈活动。剧烈间歇性生活方式体力活动已显示出降低死亡风险和慢性病风险的前景。然而，目前缺乏基于实证得出的定义。我们使用常用于定义剧烈强度的生理和基于努力程度的指标，研究了引发对标准化日常生活活动产生生理和主观用力反应所需的最短时间。
70名成年人（年龄=58.0±9.6岁；35名女性）以随机顺序完成了9项日常生活中的VILPA活动，包括快走、快上坡行走、爬楼梯、固定自行车骑行，以及搬运相当于体重5%和10%的外部重物。在运动过程中测量代谢率（通过连续间接测热法）、心率（遥测）和主观用力程度（Borg量表）。使用最大摄氧量百分比、最大心率百分比和主观用力程度阈值来评估达到VILPA的时间。
引发VILPA的平均时间，以最大摄氧量百分比计为65至95秒（平均值±标准差=76.7±3.8秒），以最大心率百分比计为68至105秒（平均值±标准差=82.8±6.8秒），以主观用力程度计为20至60秒（平均值±标准差=44.6±6.7秒）。对于这三个指标中的每一个，引发VILPA反应的时间在性别和年龄上均无差异（P>0.08），且在日常生活任务活动之间的时间也一致。例如，对于女性和男性，在平地上行走时引发剧烈反应的平均时间分别为85.8秒（±16.9秒）和80秒（±13.9秒），而在搬运体重10%的重物时爬楼梯的持续时间分别为78.4秒（±17.6秒）和76.9秒（±17.7秒）。
当参与者进行日常生活活动时，对于最大摄氧量百分比和最大心率百分比，VILPA平均在77至83秒时引发生理反应，对于主观用力程度则在45秒时引发。在达到VILPA的时间上，性别和年龄之间没有差异，这表明在旨在评估偶然体力活动对健康影响的干预措施和基于人群的研究中，可以使用一致的行为VILPA转化标准。
