An exercise for an isolated workout of the biceps that builds up the muscles.
Stand up straight, grasp the lower handle with an underhand grip.
Slightly bend your elbows.
As you exhale, from the starting position bend your arms slowly.
Do not pause at the top, slowly return to the starting position as you inhale.
You can raise both hands by using the wide handle, or alternately work one hand by using the narrow handle.
If you take too heavy weight, you will start using your back and legs to help with the lift.