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Why do my knees crack when doing squats?

Author

Emily Ross

Published Jan 18, 2026

Why are my knees cracking when I squat? A lot of people ask this question, and the most common cause is gas bubbles inside the synovial fluid surrounding the joints. When you bend your leg, they sometimes burst, causing the cracking sound. It is nothing to worry about.

Is it normal for knees to crack while doing squats?

Popping and cracking sounds usually aren't signs that something's wrong. “A lot of joints crack and the knees are a really common joint to crack,” says David McAllister, MD, director of the UCLA's Sports Medicine Program. “Most people have knees that crack when they squat down or go through the full arc of motion.

How do I stop my knees from cracking when I squat?

4 Easy Exercises That Will Fix Your Knee Clicks When You Squat

  1. Osteoarthritis cartilage – Physiotherapy.
  2. Foam Rolling Thigh.
  3. Deep Squat Stretch.
  4. Stretching Quads with Rope.
  5. Knee Flxion Gapping Stretch.
  6. Omega 3 Fish good for inflammation.
  7. Primal Physiotherapy.

How do you fix crunchy knees?

The first line of treatment for this condition includes rest, ice, compression, and elevation, or “RICE.” Anti-inflammatory medication and physical therapy exercises can also relieve it. If these do not help, splinting, surgery, or both may be necessary. They may help to realign part of the knee.

Does knee crunching go away?

Crepitus is usually harmless and needs no treatment. But, if you have pain or other symptoms with a crunchy knee, you may need to see a doctor. The treatment will depend on the underlying cause. If you have OA, a variety of treatments can help you manage symptoms.

32 related questions found

Do squats strengthen knees?

The squat is a multi-purpose knee strengthening exercise that targets the quadriceps, hamstrings, and buttocks.

Why do bones crack when exercising?

For example, if you're at the gym doing repetitive exercises, such as lifting weights or pushups, you might notice a clicking or soft snapping sound each time you bend your arm or leg. This sound usually indicates that a muscle is tight, and is rubbing and causing friction around the bone, Dr. Stearns says.

How do you get rid of bone cracks?

Tips to stop cracking your joints

  1. Mindfulness. If you have a habit of cracking your knuckles (or another joint) and want to stop, a first step is mindfulness. ...
  2. Move more. A simple solution may be to move more. ...
  3. Gentle stretching. ...
  4. Stress relief. ...
  5. Exercise.

How do I stop my joints from cracking when I exercise?

If you want to stop your joints from popping, there's only one solution: get up and get moving. “Motion is lotion,” as the saying goes. Stretching and movement should prevent muscle tightness and keep your joints lubricated, thus preventing them from rubbing together.

Why do all my joints crack?

Nitrogen Bubbles

Joint cracking is often an escape of air. Synovial fluid lubricates joints, and this fluid is made of oxygen, carbon dioxide, and nitrogen. Sometimes when the joint moves, gas is released, and you hear the "popping' or "cracking' noise.

Why do knees crunch?

The crunching you hear likely is due to the cartilage in your knee becoming rough, so the bones cannot slide as easily in the joint as they normally do. Knee crepitus typically happens when the knee is bent, such as when you are squatting, going up or down stairs, or rising from a chair.

How do you lubricate joints?

Water – among other things such as exercise and proper nutrition.

  1. Water helps keep joints lubricated. A component of synovial fluid, water is necessary to help prevent joint friction. ...
  2. Water helps build muscle to further protect the joints. ...
  3. Joint pain improves with hydration.

What vitamin helps with cracking joints?

Cracking knees and joints is sometimes caused by vitamin D and calcium deficiency, and sometimes dehydration. Our bodies need to be hydrated so collagen can form and lubricate around our joints. The solution: Load up on calcium citrate with vitamin D combination.

Why do I poop after exercise?

Certain types of exercise cause food to pass through your digestive tract faster than normal. This can cause reduced intestinal absorption of nutrients, less water being reabsorbed by the colon, and looser stools. Diarrhea commonly occurs in people who run long distances, especially marathons.

Who should not do squats?

People with back injuries should avoid squatting. Squats can put a lot of tension on your lower back and can lead to an injury if performed with an improper form. Squatting with back problems is asking for trouble.

Do squats make your butt bigger?

Squats work all of the glute muscles in one movement. When you strategically recruit and tax these muscles, you can trigger hypertrophy (or muscle size growth). So, yes, squats can help you build bigger glutes.

Are squats enough for leg day?

No, it's not a good idea, you should do more than just squats to strengthen your leg muscles. Even though traditional squats have several variations, you should include various exercises in your workout regimen, too, such as lunges. You can also walk, jog, and jump to tone your legs.

How does fish oil help joints?

Fish oil contains the omega-3 fatty acids Eicosapentatonic acid (EPA) and decoxahexaeonic acid (DHA). These particular acids benefit the body by promoting the reduction of inflammation in joints. EPA and DHA also limit the production of certain negative proteins that inhibit certain types of arthritis.

What is good for knee joints?

Over-the-counter medications — such as ibuprofen (Advil, Motrin IB, others) and naproxen sodium (Aleve) — may help ease knee pain. Some people find relief by rubbing the affected knee with creams containing a numbing agent, such as lidocaine, or capsaicin, the substance that makes chili peppers hot.

Can knees be lubricated?

Viscosupplementation—also known as hyaluronic acid injections or hyaluronan injections—involves injecting a lubricating fluid called hyaluronic acid into the knee. Hyaluronic acid is already present in the joint fluid in healthy knees, but it's found in lower concentrations in joints affected by osteoarthritis.

Can knee cartilage be restored?

Cartilage Regeneration Options

MACI is a surgical procedure that uses cartilage-forming cells from your body to restore damaged cartilage in the knees. It involves a biopsy to harvest chondrocytes (cartilage-forming cells), which are allowed to multiply in a lab, and surgery to implant them into the damaged area.

How do I make my joints stronger?

How to Strengthen Your Joints

  1. Exercise Regularly. Exercise improves bone density and keeps the muscles that surround your joints strong, says A. ...
  2. Build Muscle Strength. ...
  3. Strengthen Your Core. ...
  4. Try Low-Impact Cardio. ...
  5. Stretch After Your Workout. ...
  6. Prevent Exercise-Related Injury. ...
  7. Lose Extra Weight.

Can crepitus be cured?

Does crepitus go away? In most cases, crepitus will improve without the need for medical treatment. Applying ice to the area and taking non-steroidal anti-inflammatory drugs, such as aspirin and ibuprofen, will usually be enough to alleviate your pain and inflammation.

What exercises are good for strengthening knees?

How to strengthen your knee

  • Benefits.
  • Leg lifts.
  • Standing hamstring curls.
  • Hamstring curls on a weight bench.
  • Step exercises.
  • Single-leg dip.
  • Wall squats.
  • Post-exercise stretching.

What does clicking knees mean?

If the clicking occurs on the outside of the knee it is often related to the iliotibial band (ITB) flicking over the adjacent bony landmark, known as the lateral condyle of the femur. If this is painful then it is often known as Runner's knee or iliotibial band syndrome.