by Duncan Larkin, Published Jul. 28, 2011, Updated Jul. 28, 2011 at 10:26 AM UTC
Near the top of the list: you don't have to be young to start training for them.
by Duncan Larkin, Published Jan. 6, 2011, Updated Jan. 6, 2011 at 8:36 AM UTC
A former Olympian thinks walking in the marathon is good for you.
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