Knee Pain After Sitting and When Standing Up: Causes and Tips

You sit through a long film, a car journey or an afternoon at your desk, and when you stand up, the knee feels stiff and achy for the first few steps. Some people notice a dull pain around the kneecap while they are still sitting, especially with the knees bent for a long time. This pattern is so common that in English it even has a nickname: "moviegoer's knee".

The good news is that small changes in how you sit and get up can make a noticeable difference.

Why sitting makes knees ache

When you sit with your knees bent, the kneecap presses against the thigh bone behind it for a long time without moving. If the joint surface behind it is irritated, that steady pressure is enough to cause a dull ache. At the same time, the joint stiffens from lack of movement, so the first steps after getting up feel heavy. Standing up itself also asks a lot of the thigh muscles: they have to lift your whole body weight from a bent position.

The most common causes

• Irritation behind the kneecap. A dull ache around or behind the kneecap that builds while sitting with bent knees and also shows up on stairs.
• Osteoarthritis. Typical is "start-up" pain: the first steps after sitting hurt, then the knee loosens up after a few minutes of walking.
• Weak thigh muscles. If the muscles at the front of the thigh are weak, getting up from a low chair becomes hard work for the knee.

How to sit in a knee-friendly way

• Straighten your legs now and then. Every so often, stretch your legs out under the table for a few seconds, so the knee does not stay bent for too long.
• Choose the right chair height. Your hips should be level with or slightly higher than your knees. Very low sofas and chairs make standing up much harder.
• Get up regularly. Stand up and take a few steps every 30 to 45 minutes, even if it is only to the kitchen.
• Avoid sitting on your folded legs and do not keep one leg crossed over the other for long.
• Pick an aisle seat. At shows and on a plane, an aisle seat lets you stretch out the sore leg.

How to stand up more easily

• Move to the front of the seat before you stand up.
• Place your feet hip-width apart and a little closer to the chair, under your knees.
• Lean forward, as if bringing your nose over your toes. That shifts your weight onto your feet and makes the movement easier.
• Use your hands. Push off from the armrests or your thighs to take load off the knees.
• Pause for a moment once you are standing, then take a few small steps before walking at your normal pace.

A simple exercise for every day

The movement that troubles you is also the best exercise: practicing getting up from a chair builds exactly the muscles you need for it. Stand up from a stable chair and sit back down slowly, 8 to 10 times, once or twice a day. Use your hands at first and leave them out later, once it feels easy. Our article on knee pain on stairs has two more exercises, and the 5-minute morning routine helps if the knee is also stiff after sleep. For many people, a soft sleeve also makes the first steps after sitting more comfortable.

When to see a doctor

• the knee locks or gives way when you stand up
• the knee is swollen, warm or red
• the pain does not ease even after a few minutes of walking
• the pain gets worse day by day, even though you follow these tips

Pain after sitting is usually the sign of a knee that wants more movement, not less. With better sitting habits and a little strength work, many people find that getting up becomes easier again.

A sleeve you will actually wear

The best sleeve is the one that does not end up in a drawer. The KeenTrove Bamboo Knee Sleeve is made for exactly that:

• soft, breathable bamboo, comfortable even in summer
• fits snugly but does not dig in behind the knee
• does not lock the knee, so you move naturally
• wear it under your clothes during the day and in bed at night

With 60 days to get your money back, you have nothing to lose.

See the bamboo knee sleeve →

Note: this article is for information only and does not replace an examination by a doctor. If you have circulation problems or diabetes, or have recently had knee surgery, talk to your doctor before wearing compression.