Performing as little as twenty minutes of any physical activity, including housework, per week is enough to boost mental health. This conclusion was made as part of a study published on April 10, 2008 in the British Journal of Sports Medicine, one of the BMJ Specialist Journals.
Beneficial activities were varied, and included housework, gardening, walking, and sports. The strongest effect was seen in subjects participating in sports, who had a 33% lower risk of distress. The results showed that while a minimum twenty minutes improved the mental health of the subject, a higher level of activity indicated a lower chance of psychological distress.