It’s completely different
Not getting too full before sport is a different ball game to not eating since say 8pm the previous night then running up and down ladders with 10kg of bricks on your shoulder all morning!
Simply put, I do the basic intermittent fasting (8pm last food, 1pm following day next food)as I’ve said, but if at the weekend I have something a bit manual to do around the house in the morning and I’ve not eaten then I’m shaking by an hour in.