SIR—Sedentary behaviour (SB), defined as time spent sitting or lying, has been shown to be a major modifiable risk factor for chronic disease, disablement and frailty  independently physical activity levels (PA) [2, 3]. Time spent sitting or lying affects muscle physiology , is thought to accelerate sarcopenia , and to be a determinant driver of the obesity epidemic . These two effects of SB: obesity and low muscle strength appear to potentiate each other to increase risk of disablement and frailty in older adults .
- sedentary behaviour
- physical activity
- healthy living
Chastin, S. F. M., Ferriolli, E., Stephens, N. A., Fearon, K. C. H., & Greig, C. (2012). Relationship between sedentary behaviour, physical activity, muscle quality and body composition in healthy older adults. Age and Ageing, 41(1), 111-114. https://doi.org/10.1093/ageing/afr075