Why do some workouts (like abs) cut down size while some (like biceps) build size?

Question

Why do some workouts (like abs) cut down size while some (like biceps) build size?

In: Biology

Answer 1

Any workout will build muscle size (including abs). People that work out and eat better lose fat which makes it look like your abs are getting smaller, but really it’s just your stomach fat on top of your abs disappearing.

Abs are typically visible in men that hit around 10% body fat.

WhiZ