How can I gain muscle without losing any weight?

KaylaJoy
I'm only 2.3 pounds from being underweight (5'2 and 103.3 pounds) and I really want to gain some muscle because muscle weighs more than fat, but every time I workout I end up losing more weight. I eat more than anyone I know, but I have a really fast metabolism. Does anyone have tips on how to gain muscle without losing weight? Thank you
How can I gain muscle without losing any weight?
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