Position your arm holding the dumbbell in a way that the back of your upper arm is resting on your inner thigh, with your palm facing upwards.
Slowly curl the dumbbell upwards towards your chest while keeping the back of your arm stationary on your thigh.
Once the dumbbell is at chest level, hold the position for a moment to maximize the contraction in the bicep.
Slowly lower the dumbbell back to the starting position, ensuring that you are controlling the motion and not letting the weight drop. Repeat the movement for your desired number of repetitions before switching to the other arm.