老年人身体活动分类的代谢当量强度阈值。
Metabolic equivalents intensity thresholds for physical activity classification in older adults.
作者信息
Leal-Martín Javier, Muñoz-Muñoz Miguel, Sierra-Ramón Miguel, Cerezo-Arroyo Mónica, Gómez-Redondo Paola, Alegre Luis M, Ara Ignacio, García-García Francisco José, Mañas Asier
机构信息
GENUD Toledo Research Group, Faculty of Sports Sciences, Universidad de Castilla- La Mancha, Av. Carlos III, 45071, Toledo, S/N, Spain.
Faculty of Sports Sciences, Universidad de Castilla-La Mancha, Toledo, Spain.
出版信息
Eur Rev Aging Phys Act. 2024 May 21;21(1):14. doi: 10.1186/s11556-024-00348-5.
BACKGROUND
Although the metabolic equivalents (METs) system is a common procedure to quantify the intensity of physical activity in older adults, it remains unclear whether the conventional METs intensity thresholds (CTs) used for this purpose are appropriate in this population. Therefore, this study aimed (i) to derive overall and fitness-specific METs intensity thresholds in older adults ≥ 60 years old (OATs) expressed both in standard METs (VO/3.5 mL O·kg·min) and older adults METs (VO/2.7 mL O·kg·min), and (ii) to compare them with the CTs.
METHODS
A total of 93 subjects were assessed for cardiorespiratory fitness. Graded exercise test protocols using indirect calorimetry were performed to calculate individual VO and categorize subjects as "very poor/fair" or "good/superior" fitness. Overall and fitness-specific OATs expressed in standard METs (OATs) and METs (OATs) were derived based on the %VO and the ventilatory thresholds (VTs) physical intensity categories.
RESULTS
Significantly higher VO, VO at VT and VO at VT (p < 0.001) were obtained in the "good/superior" subgroup compared to the "very poor/fair" fitness subgroup. Accordingly, OATs were approximately 69% higher in individuals with a "good/superior" fitness compared to those with a "very poor/fair" fitness. Furthermore, this study showed that OATs were approximately 21-24% lower than OATs, and 10-22% higher OATs were observed when following the VTs intensity categories (heavy-intensity physical activity [HPA] and severe-intensity physical activity [SPA]) compared to the %VO categories (moderate-intensity physical activity [MPA] and vigorous-intensity physical activity [VPA]). When compared with the CTs, similar or higher OATs and OATs for MPA, and HPA were obtained compared to the conventional MPA threshold (3.0 METs). Conversely, for VPA and SPA, lower, similar, or higher OATs were obtained depending on the METs derivation approach (OATs or OATs) or the intensity categories (VO or VTs), compared to the conventional VPA threshold (6.0 METs).
CONCLUSIONS
None of the derived OATs were concurrently similar to the CTs, suggesting that fitness-specific METs intensity thresholds adapted to the METs derivation approach should be used in older adults.
TRIAL REGISTRATION
FenotipAGING (Non-health-care intervention study), PRO-Training (NCT05619250).
背景
尽管代谢当量（METs）系统是量化老年人身体活动强度的常用方法，但用于此目的的传统METs强度阈值（CTs）在该人群中是否合适仍不清楚。因此，本研究旨在：（i）得出60岁及以上老年人（OATs）的总体和特定健康状况的METs强度阈值，分别用标准METs（VO₂/3.5 mL O₂·kg⁻¹·min⁻¹）和老年人METs（VO₂/2.7 mL O₂·kg⁻¹·min⁻¹）表示；（ii）将其与CTs进行比较。
方法
共评估了93名受试者的心肺适能。采用间接测热法的分级运动试验方案来计算个体的VO₂，并将受试者分类为“非常差/一般”或“良好/优秀”适能。基于VO₂百分比和通气阈值（VTs）身体强度类别得出总体和特定健康状况的OATs（标准METs下的OATs）和OATs（老年人METs下的OATs）。
结果
与“非常差/一般”适能亚组相比，“良好/优秀”适能亚组的VO₂、VT时的VO₂和VT₁时的VO₂显著更高（p < 0.001）。因此，“良好/优秀”适能个体的OATs比“非常差/一般”适能个体高约69%。此外，本研究表明，OATs比OATs低约21 - 24%，并且与VO₂百分比类别（中等强度身体活动[MPA]和剧烈强度身体活动[VPA]）相比，遵循VTs强度类别（高强度身体活动[HPA]和极高强度身体活动[SPA]）时观察到OATs高10 - 22%。与CTs相比，与传统MPA阈值（3.0 METs）相比，MPA和HPA的OATs和OATs相似或更高。相反，对于VPA和SPA，与传统VPA阈值（6.0 METs）相比，根据METs推导方法（OATs或OATs）或强度类别（VO₂或VTs），获得的OATs更低、相似或更高。
结论
所推导的OATs均与CTs不完全相似，这表明在老年人中应使用适应METs推导方法的特定健康状况的METs强度阈值。
试验注册
FenotipAGING（非医疗保健干预研究），PRO - Training（NCT05619250）。
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