Background

One of the research interests with regard to accelerometry is the evaluation of physical activity bout under free-living conditions.

Research question

This study aimed to examine the effect of treatment interruption on the estimation of heart rate (HR) response to moderate-to-vigorous intensity physical activity (MVPA) bout.

Methods

Twenty-five young women performed at least 30 min of MVPA during 24 h while wearing a uniaxial accelerometer on their waist and a portable HR monitor on their chest simultaneously. Based on the time series data, MVPA bout was defined as physical activity that was maintained at no less than 3 metabolic equivalents (METs) for >10 min without or with interruption, i.e., a 1-, 2-, or 3-min interruption.

Results

The frequency and duration of MVPA bout significantly increased with interruption (p < 0.01). The HR and estimated MET value for an MVPA bout with interruption were significantly lower than those without interruption (p < 0.01), and the difference gradually increased depending on the duration of the interruptions (p < 0.01).

Significance

These findings indicate that treatment interruptions could influence the estimation of cardiorespiratory response to MVPA bout under free-living conditions, and interruptions could result in an overestimation of the actual intensity of an MVPA bout.

中文翻译：

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处理中断对年轻女性心律对体力活动反应的估计的影响：加速度计研究问题。

背景

关于加速度计的研究兴趣之一是在自由生活条件下对身体活动的评估。

研究问题

这项研究旨在检查治疗中断对中度至剧烈强度体育锻炼（MVPA）发作心率（HR）响应估计值的影响。

方法

25名年轻妇女在24小时内至少进行了30分钟的MVPA，同时在腰部佩戴单轴加速度计，并在胸前同时佩戴便携式HR监视器。根据时间序列数据，MVPA发作定义为在不中断或中断1分钟，2分钟或3分钟的情况下，在不低于3个代谢当量（MET）的情况下保持> 10分钟的体力活动。 。

结果

MVPA发作的频率和持续时间随着中断而显着增加（p <0.01）。发生中断的MVPA发作的HR和MET估算值显着低于未中断的MVPA（p <0.01），并且根据中断的持续时间，差异逐渐增加（p <0.01）。

意义

这些发现表明，治疗中断可能会影响自由生活条件下对MVPA发作的心肺反应的估计，并且中断可能导致对MVPA发作的实际强度的高估。