5 Reasons for Sharp Knee Pain from Squatting

Learn Why Squats Make Your Knees Hurt And How to Deal With It

By Coach E

sharp knee pain when squatting

Sharp knee pain when squatting can really put a damper on your workouts. Here’s what might be causing it and how to fix it.

Squatting is a fundamental movement pattern. Not only are squats a good exercise in and of themselves, they are the foundation for powerful progressions like weighted squats, pistol squats, Olympic lifts and more.

Squats are common in everything from weight lifting and cross fit to yoga and ballet barre. So if sharp knee pain when squatting is causing you trouble, you might be limited from a wide range of recreational and daily life activities.

Examining Sharp Knee Pain When Squatting

Knee pain from squats can be felt in different regions of the knee. Some folks experience lateral pain on the outside of the knee, some folks on the medial or inside region, some folks on the font of the knee or around the kneecap.

Paying attention to where exactly your pain is located can help clue you into the potential causes behind it. And if you know the source of the problem, you will be better equipped to handle it.

There are 5 common reasons for sharp knee pain when squatting. We’ll take a look at each of these hidden causes PLUS what you can do to ease the pain.

Let’s get you back out there and back to squatting pain free (although I can’t promise that the squats will always be easy!)

 sharp knee pain when squatting deadlifts

Reason #1: Meniscus Problems

Problems with the meniscus in your knee joint are a common cause of knee pain from squatting. In fact, I’ve experienced this type of knee pain from squats.

This pain is usually caused by small tears in the meniscus, a disc of cartilage that sits between your femur and tibia (your shin bone) and absorbs shock and pressure in the knee [1].

knee anatomy - harp Knee Pain from Squatting

A major meniscus tear can be a serious problem that requires surgery, but a minor or microtear can simply cause pain and irritation during certain movements – like say, during squats.

The pain is typically felt on the medial side of your knee, and often it feels like your knee joint suddenly locks or catches with pain as you squat.

I have a slight meniscus tear and find the pain comes and goes randomly. I find my knee will just “click” into place and then I won’t have any problems for months until something “clicks” back out of place.

One exercise that helps keep meniscus issues from causing me pain and interrupting my squats are SB Leg Curls.

This technique will help provide stability to the knee by strengthening the hamstrings as they flex at the knee and extend at the hip. You’ll feel stronger and more stable at the knee joint by incorporating this move into your routine, especially since the hamstrings are often weak relative to the quads.

SB Leg Curls

sharp knee pain when squatting - sb leg curls

  • Grab a stability/Swiss ball
  • Get into a supine position with your feet resting on the ball and hands relaxing by your side
  • Lift your hips up off the ground into a bridge
  • Pull the ball in, bringing your heels toward your butt as you drive your hips up (don’t just bend at the hips!)
  • Roll the ball back out
  • If you want to make it harder, bring the ball in with both legs, but lift one leg off as you roll back out
  • Another advanced option is to lift one heel slightly off the ball before you roll in, performing both the in and out motions with one leg

Reason #2: Chondromalacia patellae

Another common cause behind knee pain squats is a condition called chondromalacia patellae.

This issue, which is sometimes called “runner’s knee” is very common among young, active people [2].

The condition is basically a wearing down of the cartilage that sits between the underside of your patella (kneecap) and the top of your femur.


The pain from this condition is generally centered around on the front of the knee, on the kneecap. More specifically, it may be felt behind or below the kneecaps, or perhaps on either side of the patellae [3].

The pain tends to get worse when you flex your knee, like when you pop down into a squat. You might even feel a grinding sensation in the knee when it’s bent in this way.

Chondromalacia patellae is typically caused by some sort of biomechanical or muscular imbalance that is causing increased wear and tear on this cartilage. To help ease the pain and address the issue, you can’t just focus on the kneecap, you’ve got to look at how the knee functions with the other joints along the kinectic chain – you’ve got to think big picture.

kinetic chain

For example, try the Midline Muscle Activation Drill – a comprehensive balance technique that hits the hips, ankles, and knees all in one go. This 3-part move will help engage your joints while encouraging proper muscular activation and support.

Midline Muscle Activation Drill

Part 1:

  • Set up a band low to the ground and step in with your right foot
  • Loop the band just above your knee and step away until you feel slight resistance
  • Spread your toes to prepare
  • Stand on your right foot, letting your left leg hover
  • Press the ball of the foot and the big toe mound into the ground as you balance
  • Hold the balance for between 30 seconds and 1 minute before switching sides

Part 2:

  • Balance on your right foot
  • Step back into a lunge with your left foot
  • Lower down into a split squat, bending your left knee down to the ground and then raising it back up
  • Resist the pull from the band on your right knee to maintain proper alignment
  • Do 10 slow reps, then switch sides

Part 3:

  • Balance on your right foot
  • Step back with your left foot and lower into a reverse lunge
  • Lift back up to standing and repeat for 10 reps
  • Balance on your right foot
  • Keep your right knee straight as you hinge at your hips, lifting your left leg out behind you
  • Lift back up and complete 10 reps
  • Switch sides

Reason #3: Patellar tendonitis

Patellar tendonitis is yet another common cause of painful knees when squatting. This issue affects your patellar tendon, which runs from your kneecap to your tibia.

When this tendon becomes irritated or injured (usually from too much stress or pressure on the tendon), it can cause pain at the front of your knee.

Patellar tendonitis is often called “Jumper’s Knee” because the tendon absorbs a lot of the force on your lower limb as you land and jump [4]. But it could easily be called squatter’s knee as well, because performing this move also relies on the tendon.

sharp knee pain when squatting patellar tendonitis (1)

We’ve written another article focused on patellar tendonitis, so if this is your issue, you can read it here.

Reason #4: Valgus Knees during Squats

This next reason your knees could be causing pain when you squat is pretty easy to spot.

Take a look in the mirror as you squat. Are your knees staying more or less pointed straight forward? OR, are they starting to point in towards each other?

If the second situation is the case, valgus knees could be the cause of your pain. This improper positioning (also called knock-knees) can be caused by a variety of issues, including weak gluteus medius muscles and internally rotated hips.

bowlegs vs knock knees

Image by www.chortho.com

Having a knock-kneed form could set you up for something a lot more serious than some pain with squats. Valgus knees can make you more prone to serious issues like ACL or PCL tears [5].

To address valgus knees, try exercises like those I suggest in this article outlining different exercises to target the gluteus medius. These moves will help wake up those glute muscles that will help fix valgus knees and encourage better balance all along the lower body

Reason #5: Poor Hip Flexion Mobility & Technique

Issues with hip flexion mobility and technique can also lead to knee pain in squats. This is the other type of squat knee pain I’ve experienced.

This pain happens to me when I jump into working sets of squats without a sufficient warm-up, especially after a long time spent immobile and sitting.

I don’t want to sound like a broken record, but there is no getting around it – the knee doesn’t operate in isolation.

If your hips are either chronically tight or temporarily tight due to an insufficient warmup and you tell your body to assume a squat position, requiring deep flexion at both the hip and knee, your body is going to fudge it and make up for that hip tightness elsewhere.

One place your body will look is your spine – your lumbar spine will flex and this could lead to injuring a disc or ligament and low back pain.

tight hamstrings - knee pain from squats

This often leads to overactive quadriceps that step in to make up for underactive glutes and hamstrings. An overactivity of the quadriceps along the front of your leg puts excess stress on your patella and your patellar tendon. And that spells – you guessed it – knee pain.

To avoid this type of knee pain, you’ll want to spend some time devoted to improving your hip mobility and encouraging proper activation of the muscles that work your hips.

This article has a ton of great hip mobility moves that you can do while sitting! There’s no excuse for not incorporating these moves – try them at your desk or even while chilling out and watching TV. Your hips and knees will be much better for it.

So take a little bit of time to consider which of these 5 reasons might be behind your knee pain when squatting. Start to incorporate exercises to address these reasons and improve your muscular balance and form.

You should start to see reduced squat pain, meaning you can workout the way you want to and start to progress those squats.


A lot of people wonder why their knees crack or pop when they squat.  Most commonly it is due to a piece of soft tissue, or fascia snapping into place through the arc of motion.  Rarely it is due to wear on the articular cartilage of the patella, or a torn meniscus, two situations we want to avoid.

When the tissues are under too much tension they can snap across a portion of the joint surface and eventually wear out over years. The key is to decrease the tension on the tissues by lengthening them with a combination of ASMR and proper muscle activation around the hip and feet.

Often the ITB or rectus femoris are too tight because the psoas is not working well.  So use ASMR techniques or your foam roller to relax the quad, ITB and adductors, then follow it up with Psoas activation using one of these techiques.

Check out the benefits of foam rolling here and how to mobilize the patella.

The big question is should you still squat even though your knee is popping?  If you don’t have pain or swelling while you squat and pop, then you are good to go.  However, if you have pain and swelling of you knee, then this is a sign there could be tissue damage.

First try the tips above and see if the pain resolves quickly.  If it does not, then get your doc to have a look and check out the knee recovery program.

This article was reviewed and updated on January 14, 2021 by our Chief Medical Officer, Dr. Erin Boynton, MD, FRCS to include new research and information on latest surgical developments. Read more about Dr. B here.

About the Author

Eric Wong (aka Coach E) is the founder of Precision Movement and has a degree in Kinesiology from the University of Waterloo. He's been a coach since 2005 and spent his early career training combat athletes including multiple UFC fighters and professional boxers. He now dedicates himself to helping active people eliminate pain and improve mobility. He lives in Toronto (Go Leafs Go!) with his wife and two kids and drinks black coffee at work and IPAs at play. Click here to learn more about Eric.