Originally Posted by KevinNYC
He's also a freak of nature.
Yeah, but surely he's not the only human with a back that will allow him to do many situps with no issues.
It's an exercise that many athletes have as part of their regimen and their backs fare just fine throughout life.
Maybe it's the way certain people are anatomically structured? Or maybe some people should work on strengthening their lower back first on a roman chair or something before doing situps hardcore.