Physical activity and inactivity in an adult population assessed by accelerometry
Physical activity and inactivity in an adult population assessed by accelerometry
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DOI：
10.1249/mss.0b013e3180a76de5
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发表时间：
2007-09-01
期刊：
影响因子：
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通讯作者：
Sjostrom, Michael
中科院分区：
文献类型：
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作者：
Hagstromer, Maria;Oja, Pekka;Sjostrom, Michael
简介：强有力的证据表明，缺乏身体活动与成年人慢性病患病率之间存在联系。为了针对人群进行干预，准确评估身体活动非常重要。本研究的目的是使用客观方法评估成年人口样本中体力活动和不活动的水平和模式。方法：一年内从瑞典人群中随机招募的 1114 名成年人（56% 为女性，45 +/- 15 岁）连续 7 天使用加速度计 (Actigraph MTI)。不活动被定义为每分钟 < 100 次计数，中等和剧烈活动的截止值分别为 1952-5724 和每分钟 > 5724 次计数。平均强度以每分钟计数来测量。结果：成年人至少从事中等强度的活动，中位时间（四分位数范围）为 31 (18-47) min.d(-1)。 52% 的人至少进行了 30 min.d(-1) 的中等强度体力活动。只有 1% 的人在三场或三场以上至少 10 分钟的比赛中达到了 30 分钟。年龄或体重指数 (BMI) 越高，平均强度、中度和剧烈体力活动越低。男性花在中等强度体力活动上的时间多于女性，但平均强度没有性别差异。不活动的变化无法用性别、年龄或体重指数来解释。结论：与常用的自我报告相比，客观获得的身体活动估计值较低，且活动模式不同。这凸显了需要更好地了解成年人健康增强体力活动的性质和测量问题。
Introduction: Strong evidence suggests a link between physical inactivity and chronic disease prevalence in the adult population. To target the right groups for interventions in a population, accurate assessment of physical activity is important. The objective of this study was to assess the levels and pattern of physical activity and inactivity in an adult population sample using an objective method. Methods: In total, 1114 adults (56% women, 45 +/- 15 yr), randomly recruited from the Swedish population across a year, used an accelerometer (Actigraph MTI) for seven consecutive days. Inactivity was defined as < 100 counts per minute, and cutoff values for moderate and vigorous activity were 1952-5724 and > 5724 counts per minute, respectively. Average intensity was measured as counts per minute. Results: The adults were active in at least moderate-intensity activity for a median (intraquartile range) of 31 (18-47) min.d(-1). Fifty-two percent accumulated 30 min.d(-1) of at least moderate-intensity physical activity. Only 1% achieved those 30 min from three or more bouts of at least 10 min. Average intensity, moderate and vigorous physical activity was lower with higher age or body mass index (BMI). Men spent more time than women in moderate and vigorous physical activity, but there was no gender difference in average intensity. The variation in inactivity could not be explained by gender, age, or BMI. Conclusion: Objectively obtained estimates of physical activity yielded lower values and a different activity pattern compared with those obtained by commonly used self-reports. This highlights the need to better understand the nature and measurement issues of health-enhancing physical activity of adults.