What is a deep knee bend?!

Question: In my aerobics programme it says do 25 deep knee bend but I'm not too sure how to do it?

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Answers: In my aerobics programme it says do 25 deep knee bend but I'm not too sure how to do it?

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while standing straight, squat down, back straight up, until your butt hits your heels, then back up again

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It is a squat without the weights

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