Performing the: A Step-by-Step Tutorial Dumbbell Lying Supine Curl
Keep your elbows close to your torso at all times as you curl the weights while contracting your biceps.
Continue to raise the dumbbells until your biceps are fully contracted and the dumbbells are at shoulder level. Hold the contracted position for a brief pause as you squeeze your biceps.
Slowly begin to lower the dumbbells back to the starting position in a controlled manner.
Repeat the exercise for the desired number of repetitions, making sure to maintain the same form throughout.