Mario has just completed an intense core training workout. If he did this workout with correct form, where might he MOST logically feel sore from this workout?

in his legs
in his abdomen
in his arms
in his neck

Most logically, Mario would feel sore in his abdomen after an intense core training workout. Core exercises primarily target the muscles in the abdomen, including the rectus abdominis, transversus abdominis, and obliques.