Dave is clearly bone idle, he moves very little and eats a lot more than they ever show or admit, you don't get to that size and maintain it by eating one burger for lunch, I was shocked at how huge he was on a vlog the other day, he was sat on the sofa and his head was almost swallowed up by his gigantic shoulders and arms, even compared to vlogs from two years ago he's stacked on the timber, as long as he makes excuses like too dusty to work out or too busy with the baby when Sophie does most of it he'll just keep getting bigger and bigger until he struggles with mobility and basics like fitting on seats in cafes and restaurants.