Performing the: A Step-by-Step Tutorial One Arm Curl
Now, while holding your upper arm stationary, exhale and curl the weights while contracting your biceps. Continue to raise the weight until your biceps are fully contracted and the dumbbell is at shoulder level.
Hold the contracted position for a brief moment as you squeeze your biceps.
Then inhale and slowly begin to lower the dumbbell back to the starting position.
Repeat this process for the recommended amount of repetitions and then switch arms.