EXERCISE · BARBELL

Skull Crusher

Arms

Elbows flaring out is what turns this into a shoulder exercise by accident. Keep them pointed at the ceiling and roughly stacked over your shoulders for the whole set — only your forearms should be moving. Lower the bar in a slight arc toward your forehead or just behind it, whichever lets your elbows stay locked in place, then press back up to straight arms without your elbows drifting forward or back. Keep the motion slow on the way down; this is one where control matters more than most, since the bar is traveling toward your face.