As I’m typing these words, I don’t think about the synchronized muscle contractions that allow my fingers to dance across the keyboard. Or the back muscles that unconsciously tighten to hold myself ...

We love working though reps of the exercise and watching our muscles pump up through the in process-but you can do so much more to build up your biceps than just the basic standing curl. On your next ...

Here’s one of those weird-yet-fascinating, quirky-yet-perhaps-helpful research findings: People who clench their muscles—by, say, making a fist or tensing their biceps—show a brief spurt of improved ...