Proper Exercise Technique
Sit on a bench with your feet on the ground. Bend over and grasp a dumbbell with your left hand (your palm should be facing up). Your elbow should be slightly touching the inside of your thigh above the knee. Slowly raise your hand toward your upper arm. Slowly lower the dumbbell to the initial position without locking the elbow joint to complete one repetition. Repeat this exercise with the right arm.
Concentration Curls Exercise