How the YUHA readiness score works
The YUHA readiness score is a number from 0 to 100 that answers one question: how ready is your body to train hard today? It is rebuilt from your own data every morning and turned into one of three calls: ready, caution or rest.
What goes into the score
Five inputs make up the score. Each one is measured against you, not against a population chart.
- Sleep. Last night compared with the sleep you personally need. That need comes from your sleep goal if you set one, otherwise from the median of your own recent nights, never a fixed eight hours.
- Stress and recovery. The best recovery signal your tracker offers. Garmin supplies all-day stress and body battery. An Ultrahuman Ring supplies its own recovery index. If your tracker offers neither, YUHA uses overnight HRV against your own 28-day baseline, and then resting heart rate against your baseline.
- Training load. The acute to chronic workload ratio, which compares your last week of training with your last four. Here is how that works.
- Daily movement. Your last three complete days of steps compared with your previous four weeks.
- Your check-in. One tap: fresh, normal, sore or wrecked.
From a score to a call
A score of 75 or higher reads as ready. From 55 to 74 it reads as caution. Below 55 it reads as rest. The call shapes today's session, so a green day can carry the hard workout and a rest day gets an honest ease-off.
Your check-in works in one direction only. Saying you feel sore caps the call at caution. Saying you feel wrecked puts it in the rest range. Saying you feel fresh never lifts a poor score, because good legs are not proof that your sleep and load agree.
When some data is missing
The score uses whatever your devices can actually measure. If one input is missing, the others carry the weight and YUHA says what it could not read. If last night's sleep never synced, the note says so instead of inventing hours. If you wear no sleep tracker, you can tap in roughly how long you slept and that self-reported night counts, while a real tracker reading always wins.
From the score to today's run
The score is not the end product. It gates Today's Session, the specific workout you are asked to do, and it feeds the coach that explains the call in plain language each morning.
Common questions
Does the readiness score use HRV?
HRV can be the recovery input, but only when your tracker has no direct recovery measure. Garmin's stress and body battery come first, then an Ultrahuman Ring's recovery index, then overnight HRV against your own 28-day baseline, then resting heart rate. HRV is also tracked as a trend on your dashboard.
Do I need a Garmin or any specific device?
No. YUHA reads Garmin, Strava, Apple Health, Health Connect and the Ultrahuman Ring, and works with whichever of them you have. With less data it says so and scores from what it can see.
Is the readiness score medical advice?
No. It is a training guide built from your own data. It is not a medical device and it does not diagnose anything. If something hurts or feels wrong, talk to a clinician.
Why does my check-in only ever lower the call?
Feeling bad is a good reason to back off whatever the numbers say. Feeling good is not proof that your tendons and your sleep debt agree, so a positive check-in is never allowed to lift the call.