Add Yahoo as a preferred source to see more of our stories on Google. Think doing the best bicep exercises is enough to get you jacked arms like The Rock? You're mistaken. Yes, the biceps may give ...

Add Yahoo as a preferred source to see more of our stories on Google. Sometimes you've got to trash your triceps (in the best way) to stimulate new levels of growth in your arms. In order to do so, ...

As the old adage goes, good things always come in threes, so it’s no surprise the most eye-popping muscle in your arms is, in fact, three parts that join together. 'There are three heads to the tricep ...

The triceps — the forgotten halves of the upper arms. You might hear “welcome to the gun show” after a bicep pump, but rarely do you hear a clever quip about the triceps. Nevertheless, they’re ...

Spot training can be really helpful when it comes to certain muscle groups, like your triceps for instance. Triceps tend to be one of those spots that no matter how hard you go on arm day, you just ...

Building serious arm size takes more than pressing on repeat. To fill out a sleeve and add lockout strength, put the triceps extension in regular rotation. This classic elbow‑extension move is one of ...

Take a wide stance with your feet and place one hand behind your back. Shift your weight over your working arm and brace your ...

While training to grow muscle, most people overlook an innate function in the body which can help build strength: the stretch reflex. "The stretch reflex is something that we all have," explains ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Arm day can be one of ...