first 20 minutes of exercise per day add one hour to life expectancy. time beyond add only adds exercise time, says risk prof. #tedxoxbridge
7:13 AM - 9 Jun 2012
from Cambridge, England
0 replies
1 retweet
1 like
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.