Looking for people interested in competing to gain muscle

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I am trying to make groups of people from different sizes to compete against each other including my self to see which people gain more muscle and why.Specially the skinny people like me who wants to gain size but sometimes needs reminder of why im doing this and that other people count on me.I do not have nothing set up right now but as soon as i get people here i will start matching and setting dates posting reports and post experiences.thanks
Also all people who want to lose weight are welcome if I have enough people i can do something similar to this competition.