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. Curls are the classic ...

Many are flexing gleefully, including Matt Damon’s arm double in “The Odyssey” Devyn Dalton.

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.

When it comes to bodily attractiveness, certain muscle groups are considered more desirable than others. In an Evolutionary Psychology study, for instance, more than 500 heterosexual women rated the ...