Sport And Exercise Psychology: A Critical Introduction

The third component of the TTM is the construct of “self-efficacy” which, as we
learned earlier in this chapter, refers to people’s confidence in their ability to perform a

Figure 8.2 The transtheoretical model

of behaviour change applied to

physical activity

Source: adapted from Buckworth and Dishman, 2002, p. 220

certain action. Theoretically, people with high levels of self-efficacy are confident of
being able to exercise even when they encounter barriers such as bad weather, fatigue or
other adverse circumstances. The final component of the TTM is the hypothetical
“decisional balance” or cost-benefit analysis in which the person is believed to weigh up
the “pros” and “cons” of taking part in regular physical activity. For example, an
advantage of exercise could be that “I know I’ll meet my friends in the gym tonight” but
a disadvantage might arise from apprehension of the fatigue that is likely to follow

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