Stand upright under a Smith machine bar with feet shoulder-width apart and grip the bar with an overhand grip. Unrack the bar, then lift your shoulders straight up toward your ears by contracting your traps. Pause briefly at the top for a strong contraction, then lower your shoulders back down with control while keeping your arms straight and core engaged.
Log your smith shrug sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.