Training is such a vital part of preparation for a game, you really do train to play. It tops up your ability, like sharpening a carving knife. You can get away with not doing it for a while, as long as you have reached a certain standard of fitness.
I've had one very bad ankle injury but otherwise I've been incredibly lucky with my fitness. I've worked hard at it and I've always been fit even compared to other players. That sustains you through various parts of your career, but I am 36.
The problem for me is that I've never actually studied photography, so it's quite a steep learning curve. Cameras these days do so much for you automatically but I still think there's a point where you should actually know the technical side.
In the last year my wife has noticed me struggling to get downstairs on a Sunday morning. I've two young children and football has been so good to me over the years I don't want to spoil it.
You need to be an adrenalin junkie when you travel with kids.