Comparative data on locomotive and non-locomotive physical activity (PA) by age and gender are lacking for Japanese adults. The purpose of this study was to investigate objectively the levels of PA in each intensity in adults and older people by both genders living in Japan with triaxial accelerometry with discrimination between locomotive and non-locomotive PA. In 571 women and 315 men aged 18–92 years from the Kanto region, PA was assessed for 6 consecutive days with a triaxial accelerometer (Active style Pro: HJA-350IT), and minutes of light and moderate-to-vigorous physical activity (MVPA) classified by metabolic equivalents were evaluated. Japanese elderly women over 70 years, spent less time in not only locomotive PA (light and MVPA), but also in non-locomotive MVPA. For non-locomotive light activity, however, there was no significant difference between women over 70 years and younger women. In contrast, for men, non-locomotive light activity and MVPA remained constant with age, while elderly men over 70 years spent less time in locomotive activities (light and MVPA). Women spent more time in non-locomotive activity than men, except for MVPA in elderly individuals, and time in non-locomotive MVPA occupied more than half of the total MVPA in all age groups for women. These findings suggest that the intensity and the type of PA for Japanese were obviously affected by age, while locomotive PA for men and non-locomotive light PA for Japanese women were obviously unaffected by age. The finding also indicates gender differences. Thus, evaluation of both locomotive and non-locomotive activity is important in the overall assessment of PA.

Locomotive and non-locomotive activities evaluated with a triaxial accelerometer in adults and elderly individuals

Background: The circadian rhythm in older adults is commonly known to change with a decrease in physical activity. However, the association between circadian rhythm metrics and physical activity remains unclear. The objective of this study was to examine circadian activity patterns in older people with and without dementia and to determine the amount of physical activity conducive to a good circadian measurement. Method: Circadian parameters were collected from 117 older community-dwelling people (66 subjects without dementia and 52 subjects with dementia); the parameters were measured continuously using actigraphy for 7 days. A receiver operating characteristic (ROC) curve was applied to determine reference values for the circadian rhythm parameters, consisting of interdaily stability (IS), intradaily variability (IV), and relative amplitude (RA), in older subjects. Results: The ROC curve revealed reference values of 0.55 for IS, 1.10 for IV, and 0.82 for RA. In addition, as a result of the ROC c...

Deriving the reference value from the circadian motor active patterns in the “non-dementia” population, compared to the “dementia” population: What is the amount of physical activity conducive to the good circadian rhythm

Background: This study aimed to determine the optimal number of steps per day needed to meet the current physical activity guidelines in a large population sample of Japanese adults. Methods: An accelerometer-based activity monitor (Kenz Lifecorder) was used to simultaneously measure moderate-to-vigorous intensity physical activity (MVPA) and step counts in 940 Japanese adults (480 women) aged 20 to 69 years. The step count per day equivalents to 2 different physical activity recommendations (23 MET-h/wk and 150 min/wk of MVPA) were derived using linear regression analysis and receiver operating characteristic (ROC) methodology. Results: Linear regression analysis showed that daily step counts correlated with weekly PAEE (r = .83) and daily minutes of MVPA (r = .83). Linear regression analysis also showed that 23 MET-h/wk of MVPA is equivalent to 11,160 steps/d, and 150 min/wk of MVPA is equivalent to 7716 steps/d. ROC analysis yielded similar findings: 10,225 steps/d are required to accumulate ≥ 23 MET-h...

Steps per day required for meeting physical activity guidelines in Japanese adults.

The significant roles that physical activities play in improving the public’s health and preventing and controlling chronic diseases are now well established, and physical activity has become recognized as a major health-enhancing behavior. This chapter provides an overview of the current recommendations for physical activity in Japan and briefly summarizes current information on the status of objectively-measured physical activity in Japanese adults. Physical Activity Guideline for Health Promotion 2013 established by the Ministry of Health, Labour and Welfare of Japan recommended that adults (20–64 years) should engage in at least 60 min of moderate- to-vigorous-intensity physical activity (MVPA) per day (equivalent to 23 metabolic equivalent (MET)-h per week of MVPA) while older adults (65 years and older) should engage in at least 40 min of physical activity at any intensity per day (equivalent to 10 MET-h per week of MVPA) to maintain health and fitness. According to direct studies of step-count equivalents to the current physical activity guidelines, 10,000 steps/day represented the optimal threshold for likelihood of accumulating at least 23 MET-h per week of MVPA. The National Health and Nutrition Survey of Japan (NHNS-J 2012) showed that the majority of Japanese adults perform inadequate amounts of exercise; only 36 % of men and 28 % of women aged 20 years or older regularly exercise for at least 30 min two or more times a week. Prefectures with relatively low levels of ambulatory physical activity are concentrated in the northeast and west. According to both population-based research and national surveys, Japanese adults take between 6,200 and 9,700 steps/day which is below the recommended 10,000 steps/day. Time trends for physical activity as measured by steps has shown that mean steps/day declined from peak values in 2003–2005 to values in 2008 by 550 steps/day among men and by 817 steps/day among women.

Physical Activity Levels and Physical Activity Recommendations in Japan

Global childhood obesity is of great concern. In 2019, the World Health Organization released global guidelines on movement behaviors for the children under 5 y of age to combat this epidemic. This study aimed to estimate the prevalence of Vietnamese preschoolers meeting the guidelines, and examined whether guideline compliance is associated with adiposity and motor development. A cross-sectional study was conducted on 103 healthy preschoolers who were conveniently sampled from preschools in urban and rural areas around Ho Chi Minh city. Time spent in different intensities of physical activity and sedentary behavior was measured using Actigraph GT3X + accelerometers over three consecutive days. Sleep and screen time were obtained via parent questionnaires. Children were classified as meeting or not meeting the global guidelines. Height, weight, and motor skills were measured by the research staff. Regression models were applied to quantify the association between guideline compliance and adiposity and motor development, adjusting for age and sex. While 17.5% of children met all three guidelines, 5.8% met no guidelines. The prevalences of children who met guidelines for physical activity time, sleep duration, and screen time were 50.4%, 81.4%, and 44.7%, respectively. There was no association between guideline compliance and adiposity and motor development. This study found a low proportion of children who met the global guidelines, whereas a high proportion of those with overweight and obesity was reported. Health programs should promote more physical activities of various intensities in young children.

Prevalence of Physical Activity, Screen Time, and Sleep, and Associations with Adiposity and Motor Development among Preschool-Age Children in Vietnam: The SUNRISE Vietnam Pilot Study

加速度計で求めた「健康づくりのための運動基準2006」における身体活動の目標値（23メッツ・時／週）に相当する歩数

/pdf/you-er-nowho-24-hour-movement-guidelines-nochong-zu-toyun-4pyb5lyusq.pdf

田中茂穂

Papers

加速度計で求めた「健康づくりのための運動基準2006」における身体活動の目標値（23メッツ・時／週）に相当する歩数

幼児のWHO“24-hour movement guidelines”の充足と運動機能・認知機能との関係：SUNRISE pilot study

田中 茂穂

Papers

加速度計で求めた「健康づくりのための運動基準2006」における身体活動の目標値（23メッツ・時／週）に相当する歩数

幼児のWHO“24-hour movement guidelines”の充足と運動機能・認知機能との関係：SUNRISE pilot study

田中茂穂