AFAIK, Ice hockey players sit in their full fucking gear throughout a match and are ready to come on at a moment's notice. Footballers are so indulged that sitting with shin pads and boots on is enough to bring them out in a rash. It's genuinely pathetic that it gets indulged/allowed.
If I was manager I'd send any player who isn't in full gear and hasn't only to take his sweater off right back to the locker room.
It certainly isn't asked too much to put your shin pads on and tie your laces.
