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Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
Published on: March 7, 2019
Physical Activity, Television Viewing Time, and 12-Year Changes in Waist Circumference
A I Shibata1, Koichiro Oka, Takemi Sugiyama
11Physical Activity and Behavioural Epidemiology Laboratories, Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, AUSTRALIA; 2Faculty of Health and Sport Sciences, University of Tsukuba, Ibaraki, JAPAN; 3Faculty of Sport Sciences, Waseda University, Saitama, JAPAN; 4School of Design, Swinburne University of Technology, Melbourne, Victoria, AUSTRALIA; 5School of Population Health, University of South Australia, Adelaide, AUSTRALIA; 6Centre for Physical Activity and Nutrition Research, Deakin University, Melbourne, Victoria, AUSTRALIA; 7School of Sports Science, Exercise and Health, the University of Western Australia, Perth, AUSTRALIA; 8School of Population Health, the University of Queensland, Brisbane, QLD, AUSTRALIA; 9School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Victoria, AUSTRALIA; 10School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, AUSTRALIA; 11School of Population and Global Health, Melbourne University, Melbourne, Victoria, AUSTRALIA; and 12Department of Medicine, Monash University, Melbourne, Victoria, AUSTRALIA.
Decreasing moderate-to-vigorous physical activity (MVPA) significantly predicts increased waist circumference. While increased television (TV) viewing time also influenced waist size, its effect was less pronounced than changes in MVPA.
Area of Science:
- Public Health
- Epidemiology
- Obesity Research
Background:
- Adult adiposity is linked to both physical activity and sedentary behavior.
- Existing evidence often relies on cross-sectional or single time-point prospective data.
- Longitudinal changes in lifestyle factors and adiposity require further investigation.
Purpose of the Study:
- To investigate the association between changes in moderate-to-vigorous physical activity (MVPA) and television (TV) viewing time.
- To determine the impact of these lifestyle changes on subsequent changes in waist circumference.
- To analyze longitudinal data from a large Australian population-based study.
Main Methods:
- Utilized data from the Australian Diabetes, Obesity, and Lifestyle study (1999-2012).
- Included 3261 adults aged 25-74 years at baseline, with measurements at three time points.
- Employed multilevel linear regression to assess 5-year changes in MVPA and TV viewing time against 12-year changes in waist circumference, controlling for confounders.
Main Results:
- Increases in MVPA were significantly associated with attenuated increases in waist circumference (P < 0.001).
- Changes in TV viewing time did not show a statistically significant association with waist circumference changes (P = 0.06).
- Combined changes: reducing MVPA and increasing TV viewing time led to a 2-cm greater increase in waist circumference compared to increasing MVPA and reducing TV viewing time (P = 0.001).
Conclusions:
- A decrease in MVPA is a significant predictor of increased waist circumference.
- An increase in TV viewing time also contributes to waist circumference increase, but to a lesser extent than MVPA.
- Longitudinal analysis highlights the critical role of maintaining or increasing physical activity for weight management.
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