I did it with Atkins when I was wrestling in HS. It was no fun. I was behind the eventual State Champ in my weight class on our team. It was either drop a class or go up to unlimited where the joint dislocater's played. I saw some unhealthy weight loss methods in wrestling, no liquids the day of the match, laxatives,guys spitting in cups, anything to shed a few pounds or ounces to make weight.
My Sr. year "Russian Vitamins" aka steroids started showing up. They revolutionized all the power sports and killed a lot of people for the performance edge.
Stay on your diet ,get a bike, and forget fasting. A little trick from a guy who had to go through a few winters of making weight, drink hot water. It makes you feel full.