A systematic review by UK authors has concluded that exercising in the natural environment leads to greater benefits in mental and physical wellbeing than exercising indoors. Eleven controlled trials incorporating information from 833 adults were included in the review. The study found that most trials showed an improvement in mental well-being: compared with exercising indoors, exercising in natural environments was associated with greater feelings of revitalisation, increased energy and positive engagement, together with decreases in tension, confusion, anger and depression. Participants also reported greater enjoyment and satisfaction with outdoor activity and stated that they were more likely to repeat the activity at a later date. (Does participating in physical activity in outdoor natural environments have a greater effect on physical and mental wellbeing than physical activity indoors? A systematic review. Environ Sci Technol. 2011 Mar 1;45(5):1761-72).

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