Your knee’s been sore for months. Every squat, every set of leg extensions, every flight of stairs sets it off. But the quad and hamstring strength you need to actually get better keeps slipping, because you can’t load the joint hard enough to build it.
That’s the trap with knee arthritis, patellofemoral pain, and tendinopathy around the knee or hip. Strength is the fix. Loading is the problem.
The myth: you need heavy weights to get stronger
Most people assume real strength only comes from lifting heavy. Go hard or don’t bother. If your joint can’t tolerate a heavy squat, the assumption is you’re stuck doing nothing until it calms down.
The truth: a cuff and light weight can do the job
Blood flow restriction (BFR) training isn’t new. It’s just more accessible now, thanks to smaller cuffs and better tech.
Here’s how it works. We put a cuff high on the limb and measure limb occlusion pressure, then set the cuff to 60-80% of that number. Blood pools in the limb. That creates a low-oxygen environment that mimics high-intensity exercise, even though you’re only doing light-load, high-rep work.
The result: a strength and hypertrophy stimulus similar to heavy lifting, without putting heavy load through the joint.
That matters for knee and hip arthritis, patellofemoral pain, patellar tendinitis, fat pad syndrome, quad and hamstring strains, hip tendinopathy, greater trochanteric pain, and Achilles tendinopathy. It also shows up in upper body work: rotator cuff issues, bursitis, tennis elbow, golfer’s elbow. Cuff placement on the upper limb can even help some cases of chronic low back pain.
One thing to flag: if you’ve had blood clots or a clotting disorder, BFR needs a proper assessment before you start. Don’t self-prescribe this one.
BFR isn’t a replacement for normal training either. If you can load a joint normally, you should. It’s what we reach for when normal loading isn’t an option yet.
What to do about it
If you’re sitting on the sidelines because your knee or shoulder can’t handle a real workout, that’s the exact situation BFR was built for: a way to keep building strength while the joint settles.
Ask about it if you’re dealing with knee OA, patellar tendon pain, or a rotator cuff that hasn’t responded to the usual exercises. We use it regularly at The Physio Hub in Collingwood, and for a lot of people it’s the missing piece between not being able to load the joint and actually getting stronger.
If you’ve been told to just rest and hope for the best, that’s exactly the kind of vague advice we don’t do. Reach out and we’ll figure out if BFR is a fit for you.