Here’s what’s really going on and how to fix it before it gets worse
If your left knee aches after a round of golf, you might be telling yourself it’s just age. But here’s the truth: it’s probably not age at all. Something specific is happening inside your knee every time you swing and the sooner you understand it, the sooner you can stop it.
I’m a medical doctor who helps golfers get rid of knee pain without surgery. I see this problem all the time. And the good news is, once you know what’s causing it, there’s a lot you can do.
Your Knee Is Doing Something It Wasn’t Built For
Picture wringing out a wet towel. You hold one end still and twist the other with force. That’s basically what happens to your left knee every time you swing a golf club.
Your left foot stays planted on the ground — that’s the still end. But your upper body is rotating hard through the downswing — that’s the twisting end. Your knee is stuck right in the middle, taking the full force of that twist.
And the numbers are shocking: during a golf swing, the force going through your lead knee can be three to four times your body weight. If you weigh 180 pounds, that’s more than 700 pounds of force — in under a second — with a twisting motion your knee was never designed to handle. Multiply that by 80 swings a round, and you start to see the problem.
The Part of Your Knee That Takes the Hit
Inside your knee, on the inner side, sits a small C-shaped piece of cartilage called the medial meniscus. Think of it as a shock absorber — a cushion between your thigh bone and shin bone. When you walk or run, it compresses and bounces back. Simple.
The problem? Golf asks it to compress and twist at the same time. It’s not built for that. Over time — not from one big injury, but from thousands of tiny ones — the cartilage starts to break down and can eventually tear.
And once it tears, it struggles to heal. The inner part of this cartilage has almost no blood supply, which means the body can’t easily repair it the way it would a cut or a bruise.
Watch out for these three warning signs:
Sharp pain on the inner side of your knee — not a general ache, but a specific sore spot you can point to.
A catching or locking feeling — like something is getting stuck inside the joint.
Swelling that shows up hours after playing — often the next morning.
If you have any of these, see a doctor.
The Real Cause Might Surprise You
Here’s what most golfers don’t realise: the damaged cartilage is not actually the root problem. It’s the result of the problem.
The real issue is usually weak or tight muscles — particularly around the hips. When your hips aren’t strong or flexible enough, your knee ends up doing extra work to complete the swing. It twists more than it should, and the meniscus takes the hit.
Try this quick test: stand on your left leg, slowly bend the knee, and rotate your body like you’re following through on a swing. Does your knee wobble or cave inward? If so, your stabilising muscles aren’t pulling their weight — and your cartilage is covering for them.
5 Simple Ways to Protect Your Knee
- Turn your front foot out. Point your left toes toward the target about 20–30 degrees. This small tweak lets your leg pre-rotate, so your knee doesn’t have to twist as hard during the swing.
- Strengthen your glutes. Strong hip muscles absorb the rotational force before it reaches your knee. Try single-leg bridges, clamshells, and lateral band walks — 3 sets of 15 reps, three times a week.
- Loosen up your hips. Tight hips force your knee to rotate more than it should. Spend 10 minutes a day on hip stretches — specifically internal rotation and 90-90 stretches.
- Get your swing checked. A golf pro or physical therapist who understands the body can spot things you’d never notice yourself. Even one small fix — like widening your stance — can take a huge amount of stress off your knee.
- Rethink your shoes. Metal spikes grip the ground tightly. If your hips are stiff, that grip forces the twist straight into your knee. Shoes with softer traction allow a little natural foot rotation, which takes the pressure off.
Your knee pain is a message. It’s telling you something that the way you move needs attention. The cartilage inside is tough — but only when the muscles around it are doing their job. Make a few changes now, and you’ll be playing pain-free for years to come.
Dr. Gayan Poovendran is a medical doctor specializing in knee pain in golfers. This article is for educational purposes only and is not a substitute for personalized medical advice. If you’re experiencing knee pain, please see a qualified healthcare professional.
