Heatwayve
16 muscles

Explore your anatomy

Everyone can hand you a list of exercises for a body part. Fewer can tell you how much of a set each one actually credits — which is the number that decides whether your week adds up, and the reason your arms are probably doing more than you think.

Reading the other way round — one movement, every muscle it touches — is the exercise library. The weekly arithmetic behind both is on volume landmarks.