Parkinson's patients Jim Coppula, Deloris Nouhan (C) and Ron Addison (R) greet themselves and work on their posture as they train during their Rock Steady Boxing class in Costa Mesa, California ... more 
Parkinson's patients Jim Coppula, Deloris Nouhan (C) and Ron Addison (R) greet themselves and work on their posture as they train during their Rock Steady Boxing class in Costa Mesa, California September 16, 2013. According to the Parkinson's Disease Foundation, research has shown that exercise can transiently increase the levels of dopamine in the brain, which is significantly reduced in Parkinson's disease. The club, whose headquarters is in Indianapolis, was started in 2006 and has 15 affiliates in six U.S. States, and one in Australia. Picture taken September 16, 2013. REUTERS/Mike Blake (UNITED STATES - Tags: HEALTH SOCIETY) less 
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Reuters | Photo By MIKE BLAKE / REUTERS
Tue, Oct 22, 2013 11:15 AM EDT