Question

mario has missed a few workouts, after deciding to go out and have fun with his friends instead of following his physical fitness plan. what internal barriers does mario seem to be suffering from?
having low self esteem and/or body shame
struggling to have self - discipline
lacking the knowledge about how to exercising correctly
having lack of safe spaces for exercise
feeling like physical fitness is a hard choice to make

Explanation:

Mario chose socializing over workouts. Self - discipline is about controlling one's actions to meet goals. Low self - esteem/body shame would relate to self - perception. Lack of exercise knowledge isn't shown. Lack of safe spaces is an external barrier. Physical fitness being a hard choice isn't the core here. Mario's issue is not sticking to the plan, which is self - discipline.

Answer:

struggling to have self - discipline