What Is the Trapezius Muscle? Trapezius muscles are large, paired, triangular muscles in the back of your neck and upper back. They extend down your back, but they’re mostly involved in the movements ...

Strengthening your trapezius is an important part of any workout routine. This muscle is involved in the mobility and stability of the scapula (shoulder blade). Both men and women seem to neglect ...

Ask someone in the gym to point to their trapezius muscles, and they’ll probably gesture toward the small mounds nestled between their neck and shoulders—but that’s really just the tip of the iceberg.