1. Sedentary Behaviour Psychology EPHE 348

2. Sedentary? Pate, O’Neill & Lobelo (2008) –Most of our knowledge does not tease out sedentary and light activity –May be a huge factor for understanding health in the future –Simple inactivity may not be adequate to understand the behaviour…..(Biddle et al., 1999; Sallis et al., 2004)

3. Screen Time?

4. Screen Viewing and Physical Inactivity High prevalence but low correlation with physical activity (Biddle et al., 2004)

5. Issues? TV screen time has not changed since the 50s (Biddle et al., 2004) Many children are high active and high tech Subtle differences perhaps, but not convincing (Smith et al., 2008)

6. Behavioural Choice Theory Work by Epstein & Colleagues –Behaviours may affect each other due to time displacement –Reinforcing value (comparator of enjoyment) –Proximity/avaialbility (comparator of ease) Results have been favorable for eating behaviours but less so with PA in children

7. Cross-Behavioural Conflict in Adults?

8. Issues Adults (aged 35-50 particularly) have limited true leisure time due to occupational, child support, marital, and domestic duties Time displacement seems most likely

9. Early evidence Correlations between TV viewing & PA (Epstein & Roemmich, 2001; Gordon-Larsen, Nelson, & Popkin, 2004; Tucker, 1993) Preliminary evidence that competing leisure-time goals are related to lower PA (Gebhardt & Maes, 1998) Preference for sedentary behaviour was correlated (-) with PA (particularly enjoyment (Salmon, Owen, Crawford, Bauman, & Sallis, 2003)

10. Intentions to watch TV (Rhodes & Blanchard, 2008)

11. Cognitive Processes for TV (Rhodes, Blanchard & Bellows, 2008)

12. How do we intervene Some rationale that PA interventions should consider sedentary behaviour control (no solid evidence yet) Time displacement may need to be a focus (dropping some habits for others or combining behaviours)

13. Motives for leisure-Time Activities Rhodes & Dean (in press) –TPB framework with 2 samples (population and undergraduate) –TV and Computer use predicted by attitudes via intention –No contribution of norms or perceived control

14. Demotion of Sedentary Behaviour? Structural Social Social Cognitive Future research needed