I see a lot of trainee drivers start with us and by the time they've passed out, more often than not the weight has piled on. Often it's the younger ones that fall into that trap. Its a problem as there's no fitness test to pass etc and healthy diet and exercise isn't promoted in anyway shape or form. Even my fellow conductors fall into that trap but not to a massive extent, I do around 10,000 steps just during my work walking up and down the train etc. But maybe it's my background coming from the military l, that stops me from putting too much on. But it's so easy to get into a bad routine with eating shop bought sandwiches etc.