t usually enough, as some exercises are just easier than others and need more weight -- one purchase of them might come with a whole set of exercises to do with them if you buy from certain places. In the meantime, anything you do for
exercise can be made more intensive by
using light dumbbells -- squats, many ab exercises, core exercises, and I'm sure you know how to do simple curls and lifts. Just do them correctly so you don't injure yourself. Try starting with YouTube.