Will slendertone help me to get fit again?

hey, im tasha and 17 and Just won my fight against cancer (YAY)! ive had it for five years ad in that time i can honestly say ive done no exercise because i was so ill. so i am 5ft10 (tall for a girl i know) and i am very thin people ask me if im anorexic but i am not at all i eat healthy and also alot its just the way i am everyone in my family is like it. but what i need to know is... will slender tone help me tone up my muscles ?? im not strong enough to do full blown exercises yet but i have been swimming also walks and jogs. if i use slendertone on my bum and belly will my muscles become toned and visibly toned?? i dont have alot of body fat. but i hope to become fit again and enjoy life! :D