1
Sit upright on a flat bench with feet firmly planted on the floor. Keep your back against the backrest and maintain neutral spine alignment. Position yourself so dumbbells can be held at arm's length at your sides.
2
Grasp a dumbbell in each hand with a neutral grip (palms facing inward). Let arms hang naturally at your sides with elbows close to your torso. Keep shoulders relaxed and chest upright.
3
Slowly lower the dumbbells by extending your elbows, allowing the weight to descend in a controlled manner. Maintain a slight bend in the elbows at the bottom position to avoid locking out the joints. Keep upper arms stationary throughout the movement.
4
Curl the dumbbells upward by flexing your elbows, rotating your forearms so palms face toward your shoulders at the top of the movement. Squeeze the biceps briefly at the peak contraction, then lower back to the starting position in a controlled manner.