Primary Muscle Group: Abdominals
Other Muscle Groups Worked in This Exercise: Biceps, Hamstrings
Breathing: Breath out as you start the exercise movement, and breath in as you move back to the start position.
Execution: Just like the figure 8, except add an explosive pull to a hold in the standing position. Always drop the bell from the top position BETWEEN your legs... not to the outside (which would likely end badly for one of your knees).