They address that a bit, though, and they point out that this is just a cross-sectional study. I think it's more like a starting place for this research (land v

They address that a bit, though, and they point out that this is just a cross-sectional study. I think it's more like a starting place for this research (land vs. water exercise) instead of anything meant to have hard conclusions drawn from it. That said, I wouldn't be surprised if other "news" agencies report on the NYT report with headlines like "Runners Have Much Stronger Hearts Than Swimmers, Study Says".