I purchase this when i first start lose a lot of weight , i be 220 pound , get down to about 170 and my body look so much better but my arm be just as big as when i be 220 -lrb- i be measure every week -rrb- coincidentally I encounter this problem right around the same time the shake weight come out - i have to get it . my arm be as big as my leg and everything else i try do nothing ! not even 10 minute a day , maybe 5 , every day for 1 week and i have lose 2 inch off my arm ! within like 2 month my arm be proportionate to the rest of my body : -rrb- and its a way fun product to use as long as you dont use it around a perverted guy LOL .