You stand up after watching TV, working at your desk, or driving for a while… and there it is.

That stiff, achy, awkward knee pain that makes your first few steps feel way older than you are.

If that sounds familiar, you’re not alone. A lot of people notice their knee feels worse after sitting still for too long, then gradually loosens up once they start moving. It can be annoying, confusing, and sometimes a little concerning especially when you’re not sure if it’s “just stiffness” or something more.

The good news? This is a really common pattern, and in many cases, it’s your body giving you a clue, not a reason to panic.

Dr. Jacob Tomlinson
Physical Therapist

Ask A Specialist

Why knee pain often shows up after sitting

When you stay in one position for a while, your knee joint is not moving through its normal range. That can lead to stiffness in the joint, surrounding muscles, and connective tissue. Blood flow is lower, the joint gets less motion, and the structures around the knee can become more sensitive when you finally get up.

For some people, the problem is less about damage and more about how the knee is tolerating load and movement.

That’s why your first few steps may feel rough, but then things start easing up once the joint warms up again.

Common reasons your knee hurts after sitting

There isn’t just one cause, but here are a few common possibilities:

1. Joint stiffness

This is one of the most common reasons. If the knee stays bent for a long time, it can feel tight and uncomfortable when you first straighten it again.

2. Irritation under the kneecap

Pain around or behind the kneecap often shows up when sitting for long periods, especially if the knee is bent the whole time. Some people notice this during long car rides, movies, or desk work.

3. Weakness in the hips and legs

If your muscles are not supporting your movement well, your knee may take on more stress than it should. Sitting for long stretches can make that stiffness and weakness feel even more obvious when you stand.

4. Early arthritic changes

In some cases, pain after sitting can be related to wear-and-tear changes in the joint. That does not automatically mean something is severe, but it does mean your knee may need better support, strength, and movement strategies.

5. Reduced tolerance to activity

Sometimes the knee becomes more sensitive simply because it has gotten deconditioned. When joints and muscles are not moving enough, even normal daily tasks can start to feel uncomfortable.

 
 
 
 
 
 
 
  
 
 
 
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 Jeff Richard 
 
 
 
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Recommend Ascend for any Physical therapy needs.
  
 
  
 
 
 
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 Noah Kimball 
 
 
 
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Ascend Physical Therapy is hands down one of the best experiences I’ve had in healthcare. Jacob runs a boutique-style practice where you get true one-on-one attention, and it shows in the quality of care. He takes the time to understand what’s actually going on, explains the process, and builds a plan that’s focused on real results, not just quick fixes.

You can tell Jacob genuinely cares about the people he works with and the outcomes they achieve. If you’re looking for a physical therapist who is knowledgeable, professional, and truly invested in your recovery, Ascend Physical Therapy is the place to go. Highly recommend.
  
 
  
 
 
 
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 Austin W 
 
 
 
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Can’t thank Jacob and the Ascend team enough. In a short period of time, he had pain that had been severely bothering me for weeks nearly gone in just a few sessions. He’s a professional in every sense of the word, and is a no brainer for any PT needs!
  
 
  
 
 
 
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 Bob VanKirk 
 
 
 
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Excellent service.. great results!! Can’t ask for better result after a secession.
  
 
  
 
 
 
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 Carol VanKirk 
 
 
 
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Dr Tomlinson is very focused on each client. There is no one size fits all.  Because he is independent he is able to give each one a highly individualized plan which is far more effective. I would highly recommend Dr Tomlinson.
  
 
  
 
 
 
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 Ronise Parks 
 
 
 
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I had a consultation with Dr. Tomlinson for my shoulder and knee and left with a lot of great information that I can use between appointments, and it has been so helpful. I like that he explains everything in a way I understand. If you are looking for a PT, look no further.
  
 
  
 
 
 
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 Greg Degnan 
 
 
 
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Dr. Jacob , is excellent at helping you recover from pain and injury. He creates a personalized program that really works💪, Do your homework the right way. I highly recommend Dr. J
  
 
  
 
 
 
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 Steven McClelland 
 
 
 
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I cannot recommend Jacob enough! He is an outstanding physical therapist in Hendersonville! I especially appreciated his communication as he discussed the different approaches to knee pain.
  
 
  
 
 
 
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 Lindsey Drone 
 
 
 
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My husband and I just had dry needling and cupping done with Dr. Jacob. It was a first for both of us and the results after dry needling were instant. Dr. Jacob did a phenomenal job listening and then explaining/showing us daily exercises to do at home to strengthen our muscles and nerves. Great atmosphere, great communication and just all around good people! Go check him out.
  
 
  
 
 
 
 
   
 
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A simple question to ask yourself

Does your knee only hurt when you first get up, then calm down after a minute or two?

That pattern often tells us the issue may be more related to stiffness, irritation, or reduced movement tolerance than a major injury. It is still worth paying attention to, but it also means there’s usually a lot we can do to help.

What you can do right now

Here are a few practical things that may help:

Break up long sitting periods

Try not to stay in one position too long. Even standing up for a minute or two every 30 to 60 minutes can make a difference.

Gently move before standing

Before getting up, try straightening and bending your knee a few times. A little movement can help reduce that “stuck” feeling.

Build strength

Your knee usually feels better when the muscles around it are doing their job. Strengthening the quads, glutes, and hamstrings can improve how your knee handles daily life.

Pay attention to patterns

Notice when it happens most. Is it worse after driving? Office work? Sitting cross-legged? These details can help identify what your knee is responding to.

When should you be more concerned?

Knee pain after sitting is often manageable, but you should pay closer attention if you notice:

• swelling
• locking or catching
• giving way
• sharp pain that keeps getting worse
• pain that does not improve once you start moving
• trouble walking normally

Those signs do not always mean something serious, but they do mean it is worth getting checked.

The bigger picture

A painful knee does not always mean a damaged knee.

Sometimes it means your body needs more movement.
Sometimes it means your strength is not where it needs to be.
Sometimes it means the joint is getting irritated by the way you sit, move, or load it throughout the day.

The key is not to ignore it and hope it magically disappears, but also not to assume the worst.

At Ascend Physical Therapy, we help people figure out why their knee pain keeps showing up and what to do about it so they can get back to moving with confidence.

Not sure why the back of your knee hurts?

Get our free Knee Pain Guide to better understand common causes of knee pain and what steps may make sense next.

And if you’re tired of guessing, book an Initial Evaluation. We’ll take a closer look, find the real issue, and create a plan that actually makes sense for you.

You can also explore more knee pain resources on our blog, including:

• Why Does My Knee Hurt Going Up or Down Stairs?
• Knee Pain When Walking: Causes and When to See a Physical Therapist
• Why Your Knee Pain Keeps Coming Back (Even After Rest)
• Why Does My Knee Hurt When I Bend It or Squat

info@ptascend.com

(615) 840-0693

ASCEND PHYSICAL THERAPY LLC

101 Tennessee Way STE 300, Hendersonville, TN 37075, United States