There's a thing called Steroids, use them, you'll have abs and the muscles around them..
Ask Chickerillo he goes from Porky Pig to Serge Nubret by using them in his program".
WOOOSSSHHHHHHHHHHHHHHH
No, they don't trim down bodyfat easily. Metabolism becomes a bit faster because of the increased heartrate, but that's about it. Strongest effect is keeping size while on a diet.