You know that friend who seems to eat pizza and stay skinny while you gain weight just looking at carbs? The same thing happens with exercise. I have a buddy who can knock out 200 push-ups and burn ...

Look, I’m gonna be straight with you – those online calculators that tell you exactly how many jumping jacks you need to burn 500 calories? They’re basically making educated guesses about your body.

As January recedes in the rearview mirror, so have most New Year’s resolutions to lose weight, eat better or get fit. In fact ...