lift heavier weights each time. you go @att the gym. yes, i realize you will eventually run out of weights that are Heavier. but consider this: combine two existing heavy weights w/ duct tape to makie a heavier dungbbell etc, etc. if you wish to cconsult me further abt this business venture i will be in book bloard, raeding. g'day, poissey';s (curling 6lb weights)