The Zottman curl isn't some hyper-technical, new-age innovation, either. The exercise has been around since the 19th century, when old-time strongman George Zottman developed it to target the biceps, ...

Grip a bar in your hand. Hold it tight. Twist the bar back and forth, left to right, over and over. Repeat for three sets with each arm for about 40 seconds.

YOUR ARM WORKOUTS are, more than likely, focused on two very important muscles: the biceps and triceps. These big muscles take up the front and rear of your upper arms, respectively. They're notable ...