I guess I should have read into this one a little further before buying. Apparently, you need to have a Barry's Bootcamp ball and some resistance bands. I have a regular stability ball but Barry's is almost like a 'canister' or 'tube' shape so a normal ball won't work. (In one of the first work out scenes they lay on ball on their backs with the resistance tube underneath for chest presses)It looked to be a pretty good workout but I honestly didn't get too far into it for lack of proper equiptment. :(I looked on amazon to see how much one of his balls were and was disappointed to see that they were $40-$50. I guess I'll know better next time to read more closely to see if there is any 'special' equiptment needed before I buy.