When I was on my mission 90% of the missionaries didn't exercise in the morning. They would either sleep in or mope around the apartment.
I'd also say that the majority of missionaries weren't giving even close to 100% effort.
I'm not saying that is the case with this kid. There is some cause for concern with his weight. He is going to have to prove himself a hard worker when he gets back. He may be the next ziggy... Or he may be someone kalani pulls an offer from because he doesn't think the kid can hack it.
Again, it's speculation either way until the kid starts going to team workouts.