Performing the: A Step-by-Step Tutorial Biceps Leg Concentration Curl
Position your elbow on the inside of your thigh, close to your knee, with your arm fully extended.
Slowly curl the dumbbell up towards your chest, keeping your elbow stable and ensuring the movement is only happening in your forearm.
Hold the position for a second, feeling the tension in your biceps.
Lower the dumbbell back down to the starting position, making sure to keep the movement controlled. Repeat the exercise for your desired number of repetitions and then switch to the other arm.