Why even 20 mins of walking a day could add 5 years to your

AI1108
AI1108 Posts: 488 Member
edited October 6 in Fitness and Exercise
"23 and 1/2 hours: What is the single best thing we can do for our health?"

http://www.youtube.com/watch?v=aUaInS6HIGo&feature=youtube_gdata_player
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