What is Exercise Readiness
Exercise readiness is a daily score (0–100%) that reflects how prepared your body is for physical activity. It is built from the heart-rate recordings captured during your workouts and updated as each session completes.
What It Measures
During every workout, your heart rate tells a story about how hard your body is working relative to its resting baseline and its estimated capacity. Yuelu combines three pieces of information from each workout:
- How long your heart rate was elevated above resting levels
- How high it rose relative to your personal range
- How the intensity was distributed across the session
These are combined into a single workout load value. Daily totals then feed into two windows: a short-term view of recent activity and a longer-term view of your training habits.
Why It Needs Time
The system needs at least 14 days of data and 5 completed workout sessions before it can produce a reliable readiness score. During this initial period, the readiness display shows "Insufficient data" — this is expected and means the baseline is still being established.
Rest days are part of the picture. Days without workouts contribute zero load, which is how the system learns the difference between a consistently active routine and a sporadic one.
What the Score Means
The readiness score is a percentage from 0 to 100:
- Higher scores (above 75%) suggest your body has recovered well and can handle harder or longer sessions
- Mid-range scores (50–74%) suggest steady, controlled training is appropriate
- Lower scores (below 50%) suggest your recent load has been high relative to your baseline, and recovery should be the priority
The score updates after each completed workout. A single hard session will lower it; a rest day or light session will allow it to drift back up.
What It Does Not Replace
Exercise readiness is a training-context signal, not a medical assessment. It does not account for nutrition, hydration, stress, illness, or how you subjectively feel. Use it as one input alongside your own judgment — not as a prescription.
Disclaimer
This material is for health education and product explanation only. It is not medical diagnosis or treatment advice.