Bracing your working arm against your inner thigh helps limit the involvement of other muscles when you perform ... can master the concentration curl and bulk up those biceps: Having proper ...

Here's an example routine for your own blockbuster bulk-up. In our latest Do It Right post, we cover how to do bicep curls properly, so you'll get better muscle growth and avoid injury.

It can only mean one thing…winter bulking season, AKA time to build more muscle. Technically, you can bulk whenever you like, it doesn’t have to be subject to the winter. But, as our physiques ...

Your tricep muscles contract and pull, while your bicep muscles relax, causing your arm to straighten back out. You can find antagonistic pairs in your legs too. Just extend and curl and see which ...