There's a lot of talk about lean muscle compared to bulk muscle, but experts say it's not worth differentiating the two. Learn why.

IF YOUR MAIN FITNESS goal is to add mass and chisel out your figure, then the thought of building "lean muscle" likely sounds rather appealing. After all, why would you dedicate hours in the gym and ...

Plus, exactly how to train to sculpt your muscles.

Don't get us wrong--cardio exercises like running on a treadmill or cycling around your neighborhood has many health benefits. But it isn't the only form of exercise that can give your body a boost.

Here’s what to know about body composition numbers and what these metrics mean for your health and performance.