Once the candy bar (or anything with sugar) is eaten, describe the feedback loop that happens.

Eating sugar creates a surge of feel-good brain chemicals dopamine and serotonin. So does using certain drugs, like cocaine. And just like a drug, your body craves more after the initial high. "You then become addicted to that feeling, so every time you eat it you want to eat more," explains Gina Sam, M.D., M.P.H

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Can you translate this

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.