[cvstar9M3]

They are great for working out in your hotel room while you're traveling. I have a set and mostly my wife used while we did p90x3 last year. I don't use them as much. They seem to help work on your stability because they force your muscles to function in ways the muscles are not use to.... say doing biseps curls, the you get a work out going up and while you extend the arms back down as the elastics pull you down... I just came from doing the good old dumbbell biceps curls and as much as I try to slow down, it aint the same as elastics on the pulling u down. I can how it may help with muscle definition as has been said.... matter fact, I'll give them shot next week.