5 minute bout of walking boosts moodThis may be partly due to the guideline's inclusion of a 10-minute minimum time-bout requirement for PA. Our findings suggest that a shorter, 5-minute bout of PA is adequate to elicit psychological health benefits. This may be encouraging to individuals who perceive “lack of time” as an exercise barrier. Individuals may also perceive this shorter time requirement to be less physically demanding. Notably, the present study demonstrates that mood-related benefits of a 5-minute exercise bout can occur from a self-selected walking pace. A self-selected pace is generalizable, and encouragingly, this may positively influence an individual's confidence in his or her ability to sustain activity and his or her anticipated enjoyment of the activity. Health care providers should consider the positive benefits of a 5-minute bout of exercise when prescribing treatment for patients suffering from mood-related disorders.