This study investigated the effects of stationary cycling on vigilance during audio-visual distraction. Participants were psychology students (n = 102) who performed a psychomotor vigilance task with and without distraction while being in one of the following three conditions: (1) the cycling-allowed condition (n = 38), (2) the cycling-instructed condition (n = 30) or (3) the no cycling condition (n = 34). Additionally, exploratory research in the form of self-reports, cycling speed, and heart rate measurements was carried out.