I agree ask one of the trainers to watch you just to make sure u d it right. I didnt do it right, I went down way to FAR,,,,hurt my back.
if it keeps up and you are doing it right,,, question would be WHY is it hurting do you have Arthritis in youre Knees? Maybe visit the doctor and have him check it out. I know my hips killed me the first few weeks thanx to arthritis.... now they getting good on it. They are USE to being used in that way.
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