I got involved in a wall sit contest and was wondering, are there exercises to help sit longer?

It may sound dumb but Im determined to win this thing. I just need tips or exercises that may help me win this thing. or:It may sound dumb but I'm det

It may sound dumb but I'm determined to win this thing. I just need tips or exercises that may help me win this thing.

or:It may sound dumb but I'm determined to win this thing. I just need tips or exercises that may help me win this thing.

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