My brother bought an elliptical maybe 2 years ago. I started walking on it not long after I moved in with him. The only problem is that when I walk on it for a long time, my knees feel really sore. I really don't know what causes it. I was thinking it might be my weight or it might be because I'm not used to it yet. I've asked other people in my family, and they think it's because I'm going too fast. I just want to know what everyone's opinion is, because it's preventing me from walking on it, and when I walk on a
treadmill or I go out for a walk, my knees don't hurt. So, please, give me your opinion.
