They sell you the candy, then they show the body shape you want and the exercise equipment that you hope will get (back) to that shape after you eat the candy.
And, as I understand it, if you use the exercise equipment for a workout, you decide you can then “reward yourself for being good” by having some candy.
(“As I understand it” because: 1. I don’t have or use exercise equpment; 2. I’ve never seriously tried to lose weight or become Really Fit; and 3. I’m not a huge candy fan — french fries and cheap wine are more in line with my vices.)
Comics I Don't Understand 
They sell you the candy, then they show the body shape you want and the exercise equipment that you hope will get (back) to that shape after you eat the candy.
And, as I understand it, if you use the exercise equipment for a workout, you decide you can then “reward yourself for being good” by having some candy.
(“As I understand it” because: 1. I don’t have or use exercise equpment; 2. I’ve never seriously tried to lose weight or become Really Fit; and 3. I’m not a huge candy fan — french fries and cheap wine are more in line with my vices.)
I’m with Arthur.