Can someone explain cutting weight using the sauna?

spiritedmind13
Okay so here's my deal, I am a Taekwondo fighter and I have weigh ins this Friday in the afternoon, and I fight on Saturday. I weigh 127 and would like to drop five pounds to be on the safe side! I am going to the sauna Friday morning and I've never been.

Can someone please tell me how long to stay in the sauna and how much water weight I would lose?
Can someone explain cutting weight using the sauna?
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