1
Sit upright on an abdominal bench with your back firmly against the backrest. Position your feet flat on the footrest and grip the sides of the bench for stability. Keep your upper body stationary throughout the movement.
2
Hold a dumbbell in one hand with a neutral grip (palm facing inward). Let your arm hang naturally down the side of the bench with your elbow positioned below your shoulder, allowing full range of motion.
3
Slowly lower the dumbbell in a controlled manner by extending your elbow, allowing the weight to descend toward the floor while maintaining tension in the biceps. Keep your upper arm stationary and avoid swinging.
4
Curl the dumbbell upward by flexing your elbow, bringing the weight back to approximately shoulder height. Squeeze the biceps at the top of the movement, then repeat for the prescribed number of repetitions before switching arms.