We asked fitness expert and certified personal trainer, Rachel Pieroni, to share her top tips on how to use strength training ...

Skull crushers is an intriguing name for an exercise, but don’t let that put you off. This is a killer move for swelling your triceps, which are the muscles on the back of your arms with three ...

To build arm size, strength, and muscle, you need to lift heavy and you need to lift hard. But the underrated key in the arm-muscle-building equation is one more idea, too: Time-under-tension. Your ...