It's a very plausible hypothesis,

The evidence is now compelling and irrefutable,

I think it's not very common to be truly physically fit and obese, though it is theoretically possible,

It would be really unfortunate if we became more complacent about obesity in blacks than in whites,

It's never too late to start.

It's similar to having a family history for a disease. You can't alter your family history or your baldness, but there are many ways to modify your risk factors,