Why can't a couch potato run a marathon?

Intuitively, it makes sense that a trained athlete can run a marathon easily, while a "couch potato" can barely run a mile. But what's the biology behind it? Find out how fit and unfit bodies respond to exercise in this episode.

Learn more about your ad-choices at https://news.iheart.com/podcast-advertisers

Popout Listen on the new Podbay
Loading...