I just finished the entire Cardio Fusion workout and when it came to the Drill Max circuit #3 using a stability ball I substituted a 4 pound medicine ball. (Due to the fact that two stability balls have been punctured in the last two months by my husband and children having way too much fun bonding------grrrrrrrr) I must say that I preferred it. It certainly intensified the circuit and I liked the fact that I could see my T.V. When I get brave enough to plunk another 20 bucks down for another stability ball I just might continue doing this curcuit with my medicine ball.
Cheryl
Cheryl