Performing the: A Step-by-Step Tutorial Concentration Curl
Rest your right elbow on the inside of your right thigh, making sure your arm is fully extended and the palm of your hand is facing forward.
Slowly curl the dumbbell up towards your chest, keeping your upper arm and elbow stationary on your thigh, only moving your forearm.
Pause for a moment at the top of the curl, contracting your bicep muscle.
Slowly lower the dumbbell back down to the starting position, and repeat the movement for the desired number of repetitions before switching to your left arm.