I imagine he's way past the point that he cares.  He probably only goes there because he has people constantly hassling him to exercise and lose weight.  So he goes to a gym, but when he gets there, he just does this kinda shit.  He's accepted his fate.  He's just a walking corpse.  I wouldn't be surprised to find out that he died already.  The video this comes from is probably a couple of years old at least.