Let’s be honest, we're all a fan of upper body day because everyone wants big arms. No, more specifically, big biceps. However, if you’ve been endlessly curling dumbbells and your t-shirt sleeves ...

Sit on the bench holding a pair of dumbbells, with your shoulders tight and your head up (not resting on the bench pad).

The arms are one group of muscles you can always rely on to make you look strong, with or without a shirt on. Big, defined ...

The biceps muscles, which span the inner and outer arm from your armpit to your elbow, were given their name because they’re each made up of two parts. The name “biceps” translates to “two heads.” ...

The quest for bigger biceps is timeless. Ask anyone from a young child to an experienced athlete to show you their muscles, and they’ll almost always raise their arm and flex their biceps in response.

Ask someone to flex, and chances are they’ll strike the classic double-biceps pose. Ask them what the best biceps exercise is, and you’ll probably hear “dumbbell curl.” That's not a bad guess, ...

There's nothing like a big-time biceps flex—and to achieve a muscle peak you can be proud of, you'll need these biceps exercises. Consider this your permission to flex. What You Need to Know About ...

Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...

For fitness purposes we can roughly divide the body into three sections: the lower body (legs), the core (abs), and upper ...

Dr Mike Israetel explains why more variety doesn’t mean more muscle. Here’s what actually drives growth in the gym ...