I have back issues also, and found that bicycling is a very comfortable form of exercise. Jogging can be too jarring on the spine, swimming is okay but getting access to a pool has it's own complications. But biking is a very efficient way of getting cardio without putting any strain on the back. And since he lives in a gated community, he can go for late night rides after streaming without worrying about the elements.
And yes, it seems like everything he eats is meat-based. A little moderation would be welcome there.