Stand with feet hip-width apart and hinge forward until your torso is nearly parallel to the floor, holding a barbell with a supinated (underhand) grip.
Brace your core and retract your shoulder blades.
Row the bar toward your lower abdomen, driving your elbows back and keeping them close to your sides.
Squeeze your back at the top, then lower the bar under control back to full arm extension.
Repeat for the desired reps without letting your lower back round.