Gender differences in physical activity are partially explained by anxiety sensitivity in post-secondary students.

Female post-secondary students typically engage in less physical activity than their male counterparts. Given that women have greater anxiety sensitivity (ie, fear of arousal-based body sensations) and anxiety sensitivity is inversely related to physical activity participation, this study sought to determine if anxiety sensitivity mediates gender differences in self-reported physical activity. : A sample of 802 post-secondary students completed the Anxiety Sensitivity Index-3 and a Lifestyles Questionnaire in September 2017. Women reported significantly less physical activity and significantly greater anxiety sensitivity. Anxiety sensitivity was significantly and inversely related to self-reported physical activity. A significant indirect effect of gender on physical activity via anxiety sensitivity was shown ( = 5.56,  = 2.81,  < .05, 95% CI [1.31, 12.78],  = .0843). Results suggest that anxiety sensitivity partially explains gender differences in physical activity. Anxiety sensitivity reduction interventions might increase physical activity participation and reduce the existing gender gap.