@lauriane13 Well leading up to it is low carb,high protein, high fat, low sodium diet. This well keep me fueled but will make it easy to shed water. I also get super hydrated about 5days out, like 5L,then each day 1L less.
Then those last 72 hours workouts may include layers of clothes. When it comes to the last 24-48 hours, my workouts are with the purpose to conserve energy and sweat as much as possible. So I may do cardio for 10 minutes then sit for 5 because I'll still be sweating. But won't sit so long I stop sweating; the hardest part is to start the sweat. I can lose 4 lb doing cardio for an hour in a windbreaker type jacket and pants with a sweatshirt over that. Saunas help to because they take no energy, just a lot of mental toughness and a buddy to keep you safe and sane.
My biggest thing about a weight cut is not starting too soon and stay hydrated prior to those last 72 hours. I have to remind myself all the weight comes from water and I have to keep eating. Yeah if I skip lunch I'll be a pound or two lighter before practice, but practice is going to be worthless because I have no energy.
With most of my freestyle tournaments I have weigh ins 12-24 hours before I wrestler so it's at least enough time to eat, sleepy, eat, drink as much water as possible, then warm up which is all I need to be ready for my matches.