Embiid has routinely been out of shape during his career.But for both of them it wasn’t a matter of discipline. Cirrus ankles didn’t trouble him cause he as widely overweight and didn’t rehab properly. It was just a kick of the draw injury. Zion got injured developed terrible habits and from all appearances hasn’t formed the discipline to overcome his bad habits. Like the other breh said, people don’t usually develop that all of a sudden. Zion is probably going to head towards a more negative outcome than a positive one.