Comment on

• What is the best dose of nature and green exercise for improving mental health? A multi-study analysis.

  Barton J, Pretty J. Barton J, et al. Environ Sci Technol. 2010 May 15;44(10):3947-55. doi: 10.1021/es903183r. Environ Sci Technol. 2010. PMID: 20337470
• 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.

  Thompson Coon J, Boddy K, Stein K, Whear R, Barton J, Depledge MH. Thompson Coon J, et al. Environ Sci Technol. 2011 Mar 1;45(5):1761-72. doi: 10.1021/es102947t. Epub 2011 Feb 3. Environ Sci Technol. 2011. PMID: 21291246
• Visual color perception in green exercise: positive effects on mood and perceived exertion.

  Akers A, Barton J, Cossey R, Gainsford P, Griffin M, Micklewright D. Akers A, et al. Environ Sci Technol. 2012 Aug 21;46(16):8661-6. doi: 10.1021/es301685g. Epub 2012 Aug 10. Environ Sci Technol. 2012. PMID: 22857379