i was diagnosed in 2002 at age 48. at the time i was an avid player and coach of soccer and after every game my pd symptoms would decrease significantly for maybe a day, i became an exercise junkie, playing 2 soccer games a week, coaching 2 teams and running 3 days a week. i quit soccer in 2006 because i started to get painful charley horses during the games that made playing too risky. my disease has progressed to where i don't run anymore, i don't want to risk falling or wearing out my knees. i do get a very small benefit from stationary bike riding, i don't measure my rpms or pulse but ride for 60minutes and break a sweat. i was in a clinical trial a 6 years ago testing forced exercise on a tandem bike and i didn't notice any improvement but i went into the trial already doing very vigorous stationary riding.