Squats & Knee pain. How deep should you go? Will squatting deep hurt your knees? Why do your knees hurt? There's a lot of myths & misinformation on the subject. This post will give you more info. The Knee First go to wikipedia to get an understanding on how your knees work & the different ligaments. The following text was originally posted by Brent on StrongLifts.com. Brent is a weightlifter. You can check his training log on his website. Another comment by galapagos, also knowledgeable: This one by me How Deep Should You Squat. At least below parallel. I like to go low. Very low. I'm a big fan of the High Bar Olympic Squat. But feel free to squat with a high bar if you prefer. Whatever you do: squat below parallel. If you can't break parallel: stretch your hamstrings & adductors. Stretch also your glutes (pirfirmos/psoas), whatever stretch the whole thing. It's always good. Now most people will struggle to break parallel. But others like me, especially smaller lifters, will have no problems breaking parallel & going very low. If you're one of these: stop when your butt tucks under. Ask someone to watch from the side or tape yourself. Going too low can lead to injury in your sacrum. This doesn't happen a lot as most people are rather inflexible, but it happens to some. Why Your Knees Hurt When Squatting Squats done properly are one of the best exercises to strengthen your knee joints. If you get knee pain from squats, you either did them wrong or you had a pre-existing problem. The knee is made for stability. If your ankle or hip joint lacks mobility, the knee will have to overcompensate mobility. But because the knee is made for stability & not mobility, it gets injured. You can't force a joint to do a task that it was designed for. In this case: you can't force your knee to be mobile while it's meant to be stabile. If you don't know what this means: plant your left foot on the ground & try to rotate your upperleg to the side This is how people typically get an ACL injury. If your hip or ankle lack mobility, the knee will have to be mobile & a similar things happen. So: if your knee hurts: look at your ankle or hip. Don't search for the knee. Similar things happen for your other joints btw: if your lower back (stability) hurts, you got a problem at the hip (mobility), etc. If you experience knee pain: -Stop doing quarter/half squats -Check your technique, knees out, push from the heels, don't bounce at the bottom, etc -Check the joint above & below: ankle & hip. More on Squat Technique This is where it all starts: technique. Learn to squat correctly. You'll find that a) many people don't squat b) many people don't squat correctly. So educate yourself. These articles will help you: -How You Can Avoid Knee Injuries from Squatting -21 Tips To Improve Your Squat Technique -Starting Strength: invest 30$ in this book once & you'll have a solid understanding on the Squat, Deadlift, Bench Press, Overhead Press, Power Clean. 30$ is cheaper than the costs of treating an injured back/knee. And remember: you need to squat. If there's only one exercise you should do: it's the squat. I squat 3 times sometimes 4 times a week. I've done Smolov Squat routines. I always squat deep. In 10 years of strength training I experienced knee pain once. When I had snapping hip syndrome which is: a lack of hip mobility. Your knee hurts: check technique & check joints above/below. Good luck.