1
Stand upright with feet shoulder-width apart, holding a barbell with both hands using an underhand (supinated) grip slightly wider than shoulder-width. Let the bar hang at arm's length with elbows close to your torso and palms facing forward.
2
Keep your chest up, shoulders back, and core engaged. Ensure your elbows remain stationary and tucked close to your sides throughout the movement. This is the starting position.
3
Lower the barbell in a controlled manner by extending your elbows, allowing your forearms to straighten while keeping your upper arms stationary. Continue lowering until your arms are nearly fully extended at the bottom position.
4
Reverse the motion by contracting your biceps and flexing your elbows to pull the barbell upward. Drive through your heels and maintain elbow position close to your torso. Return to the starting position with the bar at shoulder height, squeezing your biceps at the top before repeating.