Sleep Interpretation Library · Revised September 24, 2026

Why Did My Sleep Score Recover After a Hard Week?

By Mike Ye & Ella

In Sleepgenic’s published Week 1 and Week 2 reports, the Garmin score rose alongside HRV, resting heart rate and REM estimates. That is a real change in the recorded outputs. The original article called it “adaptation conversion,” implying that prior training caused a higher physiological setpoint. These observations alone cannot establish that mechanism.

What changed in the record

Average Overall Score rose from 60.2 in Week 1 to 70.7 in Week 2. Reported HRV rose from 37.2 to 43.3 ms; resting heart rate fell from 63.2 to 60.6 bpm; reported REM rose from 0.80 to 1.10 hours; Sleep Stress fell from 20.4 to 15.8. The same broad activity labels appeared in both weeks, and the second week’s measured sleep response was better.

What remains open

Activity labels do not match training dose. Sleep opportunity, food, final caloric timing, alcohol, illness, travel, conditions and normal week-to-week variation were not held constant. One person’s two weekly averages also cannot separate a lasting adaptation from a temporary rebound or measurement noise. The report establishes a pattern in wearable estimates, not a cause or a new setpoint.

How we would test it now

Sleepgenic’s current observation set links documented meals, intake timing and activity to the following night. We would look for repeated, comparable exposure days; report missing fields and competing conditions; and check whether the response persists over more nights. Even then, an observational record would support an association before a causal claim.

The useful reading

A rising score is more informative when duration and other overnight measures also move in the same direction. Call this a recorded recovery pattern. “Adaptation conversion” remains a historical interpretive label and a hypothesis to test, not a demonstrated physiological mechanism. Read the current research method.