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The 10 Year Twitch

Some say that 10,000 hours or 10 years of training and you can master anything. How much of a person’s ability is nature and how much is nurture? “All of us are blessed with a certain amount of fast twitch and slow twitch muscles. If you are a slow twitch person, you can do some drills to train and get faster but you’re never going to be an Olympian.” (Brendan Cournane, Chicago-based running coach).

http://well.blogs.nytimes.com/2014/10/30/is-10000-hours-all-i-need-to-run-a-faster-marathon/?rref=health&module=Ribbon&version=context&region=Header&action=click&contentCollection=Health&pgtype=Blogs&_r=0Runners