LAUSR

Objective Habits, defined as well‐learned associations between cues and behaviours, are essential for health‐related behaviours, including physical activity (PA). Despite the sensitivity of habits to context changes, little remains known about the influence of a context change on the interplay between PA habits and behaviours. We investigated the evolution of PA habits amidst the spring COVID‐19 lockdown, a major context change. Moreover, we examined the association of PA behaviours and autonomous motivation with this evolution. Design Three‐wave observational longitudinal design. Methods PA habits, behaviours, and autonomous motivation were collected through online surveys in 283 French and Swiss participants. Variables were self‐reported with reference to three time‐points: before‐, mid‐, and end‐lockdown. Results Mixed effect modelling revealed a decrease in PA habits from before‐ to mid‐lockdown, especially among individuals with strong before‐lockdown habits. Path analysis showed that before‐lockdown PA habits were not associated with mid‐lockdown PA behaviours (β = −.02, p = .837), while mid‐lockdown PA habits were positively related to end‐lockdown PA behaviours (β = .23, p = .021). Autonomous motivation was directly associated with PA habits (ps < .001) and withto before‐ and mid‐lockdown PA behaviours (ps < .001) (but not with end‐lockdown PA behaviours) and did not moderate the relations between PA behaviours and habits (ps > .072). Conclusion PA habits were altered, and their influence on PA behaviours was impeded during the COVID‐19 lockdown. Engagement in PA behaviours and autonomous motivation helped in counteracting PA habits disruption.