After a knee reconstruction, I assumed my left knee would just never be quite right. Stiff, unstable, full of scar tissue — I couldn’t do a pistol squat on that side if my life depended on it. My right leg? No problem. My left? Not a chance.
Then I came across a conversation between Tim Ferriss and tendon health researcher Dr Keith Barr that shifted how I think about joint rehab. Not through passive treatment — but through isometric loading. Holding positions that place the tendons under tension, consistently, to build them back up.
I’ve been doing these five exercises almost every day for four weeks. The difference has been real.
The 5 Exercises
1. Deep Squat Hold Lower into a full squat and hold. Keep your heels down if you can. This builds ankle, knee, and hip mobility all at once — and loads the tendons through their full range.
2. Lateral Lunge Hold Step out to the side and sink into it. This hits the inner thigh and knee from an angle most people never train. Essential for real-world knee stability and full range function.
3. Forward Lunge Hold Step forward into a low lunge. Keep the back knee straight and off the floor while the front knee extends forward over the toes. Great for hip flexor and knee tendon loading.
4. Couch Stretch Back your knee into the junction where the floor meets the wall, then slowly lean back. This is Ben Patrick’s — “the knees over toes guy,” another name worth looking up for knee rehab — go-to stretch for quad and anterior hip flexibility.
5. Jefferson Curl A slow, controlled forward roll down through the spine. Releases the posterior chain, gives the low back a deep stretch, and helps offload the facet joints while remodelling scar tissue in the small position-sensing muscles closest to the spine.
Why This Works
Tendons respond to load — not rest. If you’ve had a knee injury, hip tightness, or chronic low back trouble, the answer is rarely to avoid movement or load. A lasting solution is to load the joint more consistently, build tissue tolerance, and gradually you’ll find yourself moving better.
After four weeks of this routine — four rounds of 30-second holds per exercise, most nights — my left knee feels stronger, more flexible, and more stable than it has in years. I can just start to push through a pistol squat on my surgery knee, and I can finally sit more comfortably in the lateral lunge hold. I’m not there yet, but I’m heading in the right direction.
If you’re dealing with knee, hip, or low back issues and want a simple daily routine that builds long-term joint health — start here.
Dr Jonas Gaversjo — WholeBodyChiro, Eltham