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References a Peninsula College of Medicine and Dentistry study which has analyzed existing studies and concludes there are benefits to mental and physical well-being from taking exercise in the natural environment. The study found an improvement in mental well-being: compared with exercising indoors, exercising in natural environments was associated with greater feelings of revitalization, increased energy and positive engagement, together with decreases in tension, confusion, anger and depression.
Full article: http://www.sciencedaily.com/releases/2011/02/110204130607.htm
