Research Impact: There is a notable increase in interest in the health outcomes associated with reallocations of time between sleep, sedentary behaviour, and physical activity. While much media coverage has focused on the adverse effects of prolonged sedentary behaviour, evidence in this review suggests it would be more appropriate to shift the focus on the importance of reallocating time spent in sedentary behaviour to time spent in physical activity. While the current body of evidence indicates that time reallocation between sleep, sedentary behaviour, light physical activity, and moderate-to-vigorous physical activity may be associated with a number of health outcomes, there is a need for future studies employing longitudinal study designs, taking into account all movement-related behaviours, and examining a wider range of health, psychological, social, economic, and environmental outcomes.
Grgic, J., Dumuid, D., Bengoechea, E.G., Shrestha, N., Bauman, A., Olds, T. and Pedisic, Z., 2018. Health outcomes associated with reallocations of time between sleep, sedentary behaviour, and physical activity: a systematic scoping review of isotemporal substitution studies. International Journal of Behavioral Nutrition and Physical Activity, 15(1), p.69. DOI: 10.1186/s12966-018-0691-3