Exercise is often pushed as a treatment for depression on HN, but the evidence is surprisingly weak. Many of the studies aren't very good; most of the studies have inclusion criteria that exclude people with major depression or people who've had in-patient treatment. This means that the studies have included a bunch of people who had sponteneous remission, or who would have recovered no matter what intervention you gave them.
This study only looked at people who were recruited from inpatient or outpatient MH services; it excluded people who had other long term physical problems; and it found similar effects for solo or group exercise, and for exercise that used or didn't use equipment.
This study only looked at people who were recruited from inpatient or outpatient MH services; it excluded people who had other long term physical problems; and it found similar effects for solo or group exercise, and for exercise that used or didn't use equipment.