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Sedentary Behaviour Psychology
EPHE 348
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)
Screen Time?
Screen Viewing and Physical
Inactivity
High prevalence but
low correlation with
physical activity
(Biddle et al., 2004)
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)
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
Cross-Behavioural Conflict in
Adults?
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
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)
Intentions to watch TV
(Rhodes & Blanchard, 2008)
Physical
Activity
Affective
Attitude
.51
Physical
Activity
Intention
.31
-.14
.23
TV
Affective
Attitude
Physical
Activity
PBC
.59
TV
Intention
.38
Physical
Activity
-.22
Cognitive Processes for TV
(Rhodes, Blanchard & Bellows, 2008)
Figure 1
6
5
Intention
4
LOW TV
Processes
MED TV
Processes
HIGH TV
Processes
3
2
1
0
0
1
2
3
4
Exercise Behaviour
5
6
7
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)
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
Demotion of Sedentary
Behaviour?
• Structural
• Social
• Social Cognitive
• Future research needed