Fed up with trying to lose weight with cardio? We reveal how to use calisthenics to shed those unwanted pounds and keep them off.

Imagine trying to work out if you are dangerously overweight without once hopping on to the bathroom scales. That's what a new method for determining body size aims to do.

It's an age-old weight room question, but the answer isn't as simple as you might think. Here's what you need to know.