Amagasa Shiho, Fukushima Noritoshi, Kikuchi Hiroyuki, Takamiya Tomoko, Oka Koichiro, Inoue Shigeru
Department of Preventive Medicine and Public Health, Tokyo Medical University, 6-1-1 Shinjuku, Shinjuku-ku, Tokyo, 160-8402, Japan.
Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, 359-1192, Japan.
Int J Behav Nutr Phys Act. 2017 May 2;14(1):59. doi: 10.1186/s12966-017-0519-6.
Men are generally believed to be more physically active than women when evaluated using current physical activity (PA) guidelines, which count only moderate-to-vigorous physical activity (MVPA) in bouts lasting at least 10 min. However, it remains unclear men are truly more physically active provided that all-intensity PA are evaluated. This population based cross-sectional study aimed to examine gender differences in patterns of objectively-assessed PA in older adults.
One thousand two hundred ten community-dwelling Japanese older adults who were originally randomly selected from residential registry of three municipalities were asked to respond a questionnaire and wear an accelerometer (HJA-350IT, Omron Healthcare). The prevalence of achieving current PA guidelines, ≥150 min/week MVPA in bouts lasting at least 10 min, was calculated. Gender differences in volume of each-intensity activity (METs-hour) were assessed by analysis of covariance after adjustment for age and wear time.
Data from 450 (255 men, mean 74 years) participants who had valid accelerometer data were analyzed. Women were less likely to meet the guidelines (men: 31.0, women: 21.5%; p < 0.05). However, women accumulated more light-intensity PA (LPA) and short-bout (1-9 min) MVPA, and thus established higher total volume of PA (men: 22.0 METs-hour/day, women: 23.9 METs-hour/day) (p < 0.05).
Older women were less active when evaluated against current PA guidelines, but more active by total PA. Considering accumulated evidence on health benefits of LPA and short-bout MVPA, our findings highlight the potential for the limitation of assessing PA using current PA guidelines.
在使用当前身体活动（PA）指南进行评估时，一般认为男性比女性身体活动量更大，该指南仅将持续至少10分钟的中等至剧烈身体活动（MVPA）计算在内。然而，若对所有强度的PA进行评估，男性是否真的身体活动量更大仍不清楚。这项基于人群的横断面研究旨在探讨老年人客观评估的PA模式中的性别差异。
从三个城市的居民登记册中随机选取的1210名居住在社区的日本老年人被要求填写问卷并佩戴加速度计（HJA - 350IT，欧姆龙医疗保健公司）。计算达到当前PA指南（每周至少150分钟、每次持续至少10分钟的MVPA）的患病率。在对年龄和佩戴时间进行调整后，通过协方差分析评估各强度活动量（代谢当量 - 小时）的性别差异。
对450名（255名男性，平均年龄74岁）有有效加速度计数据的参与者的数据进行了分析。女性达到指南标准的可能性较小（男性：31.0%，女性：21.5%；p < 0.05）。然而，女性积累了更多的轻强度PA（LPA）和短时间（1 - 9分钟）的MVPA，因此建立了更高的总PA量（男性：22.0代谢当量 - 小时/天，女性：23.9代谢当量 - 小时/天）（p < 0.05）。
根据当前PA指南评估，老年女性的活动量较少，但按总PA计算则更活跃。考虑到关于LPA和短时间MVPA对健康有益的累积证据，我们的研究结果凸显了使用当前PA指南评估PA的局限性。
