Sedentary behaviour is defined as a sitting or lying posture where little energy is expended (SBRN, 2012). Over 4 hour of sedentary behaviour has been defined as a level that is sufficiently sedentary to cause health and wellbeing concerns in the older population (Dogra and Stathokostas, 2012). Whether measurements are subjective or objective, the majority of older adults are sedentary. Almost 60% of older adults reported sitting for more than 4 hours per day, when objectively measured it is found that 67% of the population are sedentary for more than 8.5 hours in their waking day (Harvey et al., 2013). When looking at specific activities carried out in a sitting or lying posture, 65% of older adults sit in front of a screen for more than 3 hours daily and over 55% report watching more than 2 hours of TV (Harvey et al., 2013).
Sedentary Behaviour Research Network. Letter to the editor: Standardized use of the terms “sedentary” and “sedentary behaviours”. Appl. Physiol. Nutr. Metab. 2012, 37, 540–542.
Dogra S, Stathokostas L. Sedentary behavior and physical activity are independent predictors of successful aging in middle-aged and older adults. J. Aging Res. 2012,doi:10.1155/2012/190654.
Harvey JA, Chastin SC, Skelton DA. Prevalence of Sedentary Behavior in Older Adults: A Systematic Review. Int J Environ Res Public Health 2013, 10, 6645-6661.
For further information on the prevalence of sedentary behaviour please see: