1
Stand upright with feet shoulder-width apart, holding a dumbbell in each hand at arm's length by your sides with palms facing forward and core engaged
2
Maintain an upright posture with shoulders back, elbows fixed close to your torso, and a neutral spine throughout the movement
3
Lower the dumbbells in a controlled manner by extending the elbows, allowing the biceps to lengthen while keeping upper arms stationary
4
Curl the dumbbells upward by flexing the elbows, driving the forearms toward the shoulders in a smooth arc motion until biceps are fully contracted, then return to starting position