See the limit.
Before pain does.
A passive Moiré-based strain indicator that reveals your body's true edge — without batteries, electronics, or latency. Invented by a champion who lived the injury.
Pain is a warning liar.
Adrenaline mutes your nociceptors. By the time you feel the tear, the tear has happened. Athletes in pole, aerial, gymnastics, and yoga don't lose flexibility — they lose the signal. We give the signal back.
Two layers.
One signal.
Zero electronics.
A base layer printed with parallel micro-lines (0.4–0.8 mm pitch) and a hidden word. An overlay layer with a hexagonal micro-grid that acts as an optical shutter. They are bonded only along anchoring boundaries — the active zone slides freely with the skin.
At 22–34% skin elongation — corresponding to 75–85% of your safe ROM — the two patterns interfere. A Moiré fringe emerges. The hidden word reveals.
The textile itself is the sensor.
Relaxed
At 0% strain the overlay layer optically shuts the base layer. The garment looks neutral.
Working range
Stripes and faint shimmer appear as skin elongates — you can sense progression without alarm.
Limit
At ≥22% strain the Moiré collapses into a high-contrast pattern. The hidden word reveals.
Stop. Hold. Recover.
Move the slider.
Watch your body's voice appear.
This is the same Moiré physics that runs in the device. Drag to simulate skin elongation. The hidden indicator becomes visible at the calibrated 22% threshold.
Pm ≈ p / ε
Pm Moiré fringe spacing · p initial pitch · ε relative strain
10 px
22%
Reference
Calibrated against skin biomechanics (Ní Annaidh 2012, Stecco 2024) for the 75–85% maxROM safety window.
Champion.
Researcher.
Survivor of every
stretch she now prevents.
Tetiana spent fifteen years at the edge of human flexibility — first as a national champion in pole sport, then as a rehabilitation specialist for the athletes who walk the same edge.
She saw the same pattern in every injury: adrenaline, ambition, and a body that learns to ignore its own warnings. The signals exist. We just stop listening.
"I built the thing my younger self needed in the studio. A signal you can't ignore — because it's not in your head. It's on your skin."
Threshold-Guided
Progressive
Stretching.
A clinical framework for re-exposing tissue to end-range under objective, not perceived, control. Co-authored with the device. Tested with elite athletes recovering from hamstring, shoulder, and lumbar injuries.
Approach
Move into the position. Breathe. Find the first sensation of stretch.
Signal
Continue until the indicator pattern emerges. This is your 75–85% ROM — not your maximum.
Hold
8–12 seconds at signal. No deeper. The fascia adapts in time, not under force.
Recover
Return to neutral. 3–5 progressions per session. The signal moves with you over weeks.
Kiss the Edge
The new science of safe stretching and injury-proof mobility. A complete TGPS manual for athletes, coaches, and rehabilitation specialists. By Tetiana Vishtak.
Pre-order →- →Why "listen to your body" fails after injury
- →The biomechanics of skin and fascia, simplified
- →12-week return-to-sport TGPS plan
- →Calibrating your personal threshold without a device
Built for the people
who chase the edge.
Train without translating pain.
Pole. Aerial. Rhythmic gymnastics. Yoga. Dance. Wherever flexibility is the sport — not a side effect.
Join the waitlist →A passive sensor you can deploy in a week.
Open hardware reference design, calibration kit, and a TGPS protocol ready for IRB-approved study.
Request the lab kit →License a category that does not yet exist.
Smart textile without electronics. $0.15 COGS. Patent-pending architecture. Integration into compression, leotards, wraps, wetsuits.
Partner with us →
A category the world
hadn't named yet.
"A speedometer for muscles — without batteries, without wires."
"Mechanical Intelligence: a Ukrainian invention that may change training safety worldwide."
"The textile itself becomes the sensor — and it costs fifteen cents to make."
Patent-protected.
20-year category moat.
USPTO Customer #216770 · Inventors: Tetiana Vishtak (first named) and Serhii Nikolaichuk
Your body
knows.
Now you will too.
Join the waitlist for the first production batch, the TGPS protocol, and the launch of "Kiss the Edge."
First-batch access · 2026 Q3
Calibration kit · NDA-ready
Licensing deck · on request