Every lifter with a few pounds on his frame has at one time or another had to deal with a cranky shoulder. It's almost like a rite of passage—spend your formative years blasting your chest and ...

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.

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.