Fitness prescription is broken.

 

Most systems track what you’re doing. Not what it’s doing to you.

 

They rely on proxies like heart rate, pace, power, HRV, and calorie burn. External outputs that don’t reflect your actual physiology.

 

Heart rate zones? Off by up to 30%.

 

HRV recovery scores? Wrong 40% of the time.

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Calorie burn estimates? Off by up to 93%.

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So we created YNSYGHT, the Adaptive Human Performance OS powered by lactate-informed physiology.

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YNSYGHT analyzes your metabolic state to detect thresholds, guide training, personalize fueling, and monitor fatigue and recovery.

 

As your physiology evolves, so does the system. No labs. Less guesswork. Just intelligent guidance, anchored to one of the strongest signals in performance science.

 

The days of proxy-only estimations are over. The future of human performance is here.

 

YNSYGHT