“…[21][22][23] Evidence from controlled studies on carefully selected depressed adults and older adults suggest that exercise training improves depressive symptoms in the short term. [23][24][25][26][27][28][29] Prompted by the promise of health benefits with physical activity, many organizations, including health plans, have in recent years expanded their prevention benefits to include formal physical activity programs. Because such benefits can be costly to finance, decision makers need information on who actually use these benefits, barriers associated with use, and what pattern of use results in improved outcomes at the population level.…”