POTUS was stuck in the whitehouse for a couple of months.(cabin fever)
One of his main forms of exercise is going Golfing( which he was not able to do)
Not to mention everyone gains a little weight during the holidays.
And he is super busy.
As long as he is healthy, that's what really matters.
And he got flying colors last time they checked physical( which was quite recent)
It's an epic fucking speech, and his longest since becoming President( 2 hours 2 mins)