Examining the role of affective states in relation to exercise intentions and participation in extra-curricular exercise classes at university: A repeated measurement observational study

Background: Previous research has shown evidence on the role of affective
states for physical activity behavior. However, there is a lack of research
investigating the interplay between affective states, intentions, and exercise
behavior, especially with respect to maintaining regular exercise over time. The
study aimed to investigate whether post-exercise affective states and changes
in affect during exercise (i) are related to exercise intentions; (ii) moderate the
relationship between intention and subsequent exercise behavior, and (iii)
directly predict future exercise.
Methods: Participants from weekly voluntary sports and gym classes at two
universities were recruited. For 13 weeks, 268 individuals’ (Mage = 24.5 years,
SD = 5.6, 90% students, 67.4% female) class attendance was documented on a
weekly basis. Before and immediately after training, participants self-reported
affective states, including affective valence (Feeling Scale) and perceived
arousal (Felt Arousal Scale). Participants also reported their intention to re attend the class the following week. Mixed-effect linear models and Cox
proportional hazard models were used to examine the relationships between
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affective states, change in affective states, re-attendance intentions, and class
re-attention.
Results: Affective valence at the end of training was significantly positively
associated with the intention to re-attend the class on the within-person level
(β = 0.880, p < 0.001) as well as the between-person level (β = 0.831, p < 0.001),
while higher increases of valence during class were related to smaller
intention. For class re-attendance, significant effects of affective states were
only found on the within-person level. A one-point increase on the valence
scale increased the hazard ratio to re-attend by 8.4% (p < 0.05), but this effect was no longer meaningful after adjusting for intention. No moderation of
the relationship between intention and subsequent class re-attendance was
found.
Conclusion: The results suggest that positive affective state immediately after
exercise does not facilitate translation of intentions into subsequent exercise
behavior (i.e., do not close the intention-behavior gap). Rather, affective
valence was found to be an important predictor of exercise intentions but
seemed indirectly related to behavior via intentions. Practitioners should plan
exercise programs that allow for positive affective states especially at the end
of a training.