HRV — most important metric, trending in wrong direction
May–Jul 2024
Avg HRV 20.2 ms
Jan–Mar 2026
Avg HRV 15.7 ms — 22% decline over 22 months despite positive metabolic trends
Likely drivers
Chronic autoimmune inflammatory burden (ANA 1:1280), untreated sleep-disordered breathing (SpO2 pattern), chronic sleep debt, absence of resistance training, low magnesium (confirmed Jul 2024)
What will improve HRV
Resistance training (primary), improved sleep window (+30–45 min earlier bedtime), magnesium supplementation (started Jul 2025), autoimmune load reduction, sleep apnea treatment if confirmed
Age context
Average HRV for females in this age range ~35–50 ms. Current 15–20 ms range is notably low, reflecting cumulative chronic inflammatory and sleep burden
Sleep — adequate quantity, structural quality issues
Total sleep
7.1 hrs average — adequate quantity
Deep sleep (SWS)
80 min (19%) — within normal range (15–25%). Physical restoration, HGH release, immune function
REM
96 min (23%) — good. Supports memory, emotional processing, hormonal regulation
Chronic sleep debt
67% of nights — structural window problem. Moving bedtime 30–45 min earlier is the simplest intervention
SpO2 — possible sleep-disordered breathing
80% of nights
SpO2 averaged below 95%
19% of nights
SpO2 averaged below 93%
Minimum recorded
86.7% — significant single-night dip
Active intervention
Wedge under mattress since Apr 19, 2026 — watch SpO2 nightly average rising toward 95%+ as primary success metric
Priority actions from WHOOP data
1. Resistance training
Zero sessions in 530+ workouts across 22 months. 2×/week body weight or light resistance would measurably improve HRV within 6–8 weeks
2. Sleep apnea screening
SpO2 below 95% on 80% of nights, min 86.7% — warrants formal sleep study. OSA drives CRP, HRV suppression, and cortisol disruption
3. Extend sleep window
Moving bedtime 30–45 min earlier eliminates most chronic sleep debt. Highest-ROI behavioral change
4. Morning light exposure
Zero-cost intervention for cortisol awakening response (blunted on DUTCH). Primary circadian entrainment signal for HPA axis
5. Wedge intervention
Monitor SpO2 nightly average from Apr 19, 2026 forward — watch for rise toward 95%+ as primary success metric