Ask someone in the weight room to point to their trapezius muscle, or “traps” in gym-speak, and they’ll probably gesture toward the small mounds of muscle nestled in between their neck and shoulders.

Fitness Pro Superhuman Troy performs a three-minute trap workout to build mass using dumbbells only.

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.