How much locomotive activity is needed for an active physical activity level: analysis of total step counts.
How much locomotive activity is needed for an active physical activity level: analysis of total step counts.
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DOI：
10.1186/1756-0500-4-512
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发表时间：
2011-11-24
影响因子：
1.8
通讯作者：
Tanaka, Shigeho
中科院分区：
文献类型：
--
作者：
Ohkawara, Kazunori;Ishikawa-Takata, Kazuko;Tanaka, Shigeho
背景技术背景：尽管对公共健康的身体活动建议集中在步行和跑步等运动性活动上，但尚不确定这些活动对整体身体活动水平（PAL）的贡献。本研究的目的是确定的贡献，运动活动PAL使用总步数测量calorimeter study.METHODS：PAL，计算为总能量消耗除以基础代谢率，在11个成年男子使用三种不同的条件下进行评估24小时人体热量计测量：以PAL的低活性水平（1.45）为目标的低活动日（L-日），以及以PAL的活性水平（1.75）为目标的高频率中等活动日（M-日）或高频率剧烈活动日（V-日）。这些受试者只允许轻度活动，规定的活动除外。在一个单独的41名成年人的组中，使用双标记水（DLW）评价自由生活的PAL。在这两个实验中，每天的步数也使用加速度计测量。在人体热量计研究中，PAL和步数分别为1.42 ± 0.10和8，973 ± 543步/天（L-天），1.82 ± 0.14和29，588 ± 1，126步/天（M-天），1.74 ± 0.15和23，755 ± 1，038步/d（V日）。在DLW研究中，PAL和步数分别为1.73 ± 0.15和10，022 ± 2，605步/d，PAL和每日步数之间没有显著关系。CONCLUSIONS：These results indicates that a massive number of steps are needed for a active level of PAL if individuals extended physical activity-induced energy expenditure by only motorcycle activity.因此，在自由生活的条件下，家庭活动等非动力活动也应该在增加PAL方面发挥重要作用。
BACKGROUND: Although physical activity recommendations for public health have focused on locomotive activity such as walking and running, it is uncertain how much these activities contribute to overall physical activity level (PAL). The purpose of the present study was to determine the contribution of locomotive activity to PAL using total step counts measured in a calorimeter study.METHODS: PAL, calculated as total energy expenditure divided by basal metabolic rate, was evaluated in 11 adult men using three different conditions for 24-hour human calorimeter measurements: a low-activity day (L-day) targeted at a low active level of PAL (1.45), and a high-frequency moderate activity day (M-day) or a high-frequency vigorous activity day (V-day) targeted at an active level of PAL (1.75). These subjects were permitted only light activities except prescribed activities. In a separate group of 41 adults, free-living PAL was evaluated using doubly-labeled water (DLW). In both experiments, step counts per day were also measured using an accelerometer.RESULTS: In the human calorimeter study, PAL and step counts were 1.42 ± 0.10 and 8,973 ± 543 steps/d (L-day), 1.82 ± 0.14 and 29,588 ± 1,126 steps/d (M-day), and 1.74 ± 0.15 and 23,755 ± 1,038 steps/d (V-day), respectively. In the DLW study, PAL and step counts were 1.73 ± 0.15 and 10,022 ± 2,605 steps/d, and there was no significant relationship between PAL and daily step counts.CONCLUSIONS: These results indicate that an enormous number of steps are needed for an active level of PAL if individuals extend physical activity-induced energy expenditure by only locomotive activity. Therefore, non-locomotive activity such as household activity should also play a significant role in increasing PAL under free-living conditions.