Catch it before it hurts.

STRYD is a wearable knee sleeve that shows how hard your knees are working and how that load builds up over time. Sensors in the sleeve read the electrical activity of the muscles around your knee, mainly the quads and hamstrings, while a motion sensor tracks how your leg moves. Those muscles absorb load for the joint, so reading them shows how much work your knee is being asked to do. The app compares both signals to your own baseline, so the numbers reflect your body instead of an average person's.

Strain is how hard your knee worked in a session compared with your normal. A long run, a tournament weekend or a heavy leg day will push it up. Micro trauma accumulation tracks small stresses that each seem harmless but add up over weeks, and this metric is our estimate of that buildup over time. Knee health is the summary view. It shows whether your knee is trending toward more stress or more recovery, so you can decide when to push and when to back off.

Those devices are great at heart rate, sleep and overall recovery, but they sit on your wrist or finger, so anything they say about your knees is inferred from somewhere else. STRYD sits on the knee and reads the muscles that load it directly. It works as a companion to your watch or ring, not a replacement. Your watch shows how your whole body is doing, and STRYD shows what your knees are dealing with.

No product can promise that, and we don't. STRYD shows patterns that are easy to miss, like a knee that has taken more load than usual for three weeks, so you can adjust training, rest or technique early. What you do with that information is up to you and your coach or clinician. STRYD can't tell you what is going on inside your knee, and it is not a substitute for seeing a clinician.

Measuring muscle activity with surface sensors is well established in clinics and research labs. Our work is making it small, comfortable and usable outside a lab. We are conducting a validation study before we ship to any real users. Strain and micro trauma are estimates built from your signals, not direct measurements of tissue inside the joint. Fit matters too, since a loose sleeve gives noisier data.

Two groups. The first is competitive athletes, especially high school and travel-sport players who stack practices, games and tournaments with little recovery time. The second is active adults who run, lift, hike or play rec sports and want to keep their knees working long term. If you have knee pain or are recovering from an injury, see a clinician first. STRYD can be extra information to bring to your physical therapist, but it can't tell you whether you are healed or safe to return to sport.

No. STRYD is a wellness product, not a medical device, and it is not a substitute for care from a doctor, physical therapist or athletic trainer.

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STRYD isn't on sale yet. Join the waitlist on the homepage to be first in line when early access opens. Joining doesn't commit you to buy anything. We'll share pricing and availability with the waitlist before anything goes on sale.