IMSAFE + Ultrahuman Ring Air:
Biometric Charts from 47 Flight Training Days
Interactive charts supporting the article "IMSAFE Checklist Stress & Fatigue: Ultrahuman Ring Air HRV Data for Pilots (2026)". All data is sourced from a continuous Ultrahuman Ring Air export and the KDVT flight logbook, cross-referenced by date. N=1 self-experiment.
61.8
Avg next-day recovery
after high-workload days (≥5 landings)
70.2
Avg next-day recovery
after low-workload days (<5 landings)
13.3%
Flights conducted in
elevated risk band (recovery <50)
92
Highest recovery score
recorded in dataset
25
Lowest recovery score
recorded in dataset
66.4
Mean recovery score
across all 168 days
r²=0.068
Variance in next-day recovery
explained by landing count
p=0.084
Statistical significance
(below conventional 0.05 threshold.)
−1.03 pts
Recovery drop per
additional landing (OLS slope)
N=1 self-experiment. Not an FAA-approved fitness-for-duty assessment. The Ultrahuman Recovery Score is a proprietary metric not validated for aviation decision-making. The IMSAFE checklist remains the legal standard. Use this data for personal situational awareness only.