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The noise is usually caused by one of three things:

1. The cartilage in the knee has worn a bit or pieces have chipped off due to injury or wear. This creates an uneven surface, which creates a noise as the rough pieces pull over each other.

2. The sack that holds fluid around the knee becomes inflamed, tight, or develops scar tissue. This can be from use or injury.

3. The kneecap is not aligning correctly, and scrapes as it pulls into position when you bend the leg.

Two of these can be treated or improved, depending on severity, with a shot of cortisone into the knee. The other can be improved with special exercises to get the knee to pull into the correct position, a physical therapist or doctor will show you the exercises which will be customized depending on which way your kneecap is pulling.

All of these require a visit to a sports medicine doctor, and at minimum an x-ray, to rule out other causes that might cause noise but be more serious and need more aggressive treatment or surgery.

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Can locking your knees make you pass out?

It definitely can, but it does not always occur. Depending on how your knees are shaped, standing with your knees bent for just 10 minutes can sometimes make you faint. If your knees are shaped a certain way, then locking your knees pinches a major artery just slightly, stopping a small amount of blood to stay in your legs instead of going to your brain. The longer you stand like that, the less oxygen goes to you brain. First you will feel woozy, then you might feel very nauseous, and then you wake up on the ground, wondering what happened. Just recently during a choir performance I, not knowing any of this yet, stood with my knees locked the entire time, because it uses less muscle. I felt like I was going to throw up, saw colors, and then I woke up on the floor with three other choir members trying to help me up.


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To appear shorter without bending your knees, you can try slouching your posture, lowering your shoulders, and tucking your chin down towards your chest. This will give the illusion of being shorter without physically changing your height.


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