How to Do a bicep curl with an exercise ball incline

Unless you're tightrope walking, stability is quite a fun killer. Relish in the unknown by learning how to do bicep curls with an exercise ball incline. By forcing your core and your back to deal with the bouncy, unstable nature of the ball, you'll have to work those areas in addition to the biceps.

What does that mean for your body? Abs and arms that Jessica Alba would be jealous of.