10-Day Water Fast - July-August 2026
Complete data from my 10-day water fast (Jul 27 - Aug 6, 2026) and 12 days of refeeding: daily weight, ketones, glucose, sleep, heart rate, and HRV. Part of my fasting results series - see all my fasts and cross-fast comparisons on the Results page. N=1 data, a reference point, not a prescription.
Weight (scale), Sleep and Readiness (Oura Ring)
Ketones and Glucose (Keto-Mojo meter)
Resting Heart Rate, Heart Rate Variability and Respiratory rate (Oura ring)
Summary of All 10 Biomarker Categories: Pre-fast (Jul 25) vs Fast (Aug 8) vs Refeed (Aug 18)
Biomarker Categories
Sleep: 85 (pre-fast) -> 83 (fast) -> 84 (refeed)
Fitness: 87 -> 82 -> 87
Endurance: 88 -> 85 -> 75
Cognition: 87 -> 78 -> 82
Metabolism: 82 -> 67 -> 86
Heart Health: 76 -> 63 -> 91
Gut Health: 93 -> 86 -> 88
Hormone Health: 86 -> 86 -> 90
Inflammation: 82 -> 74 -> 80
Recovery: 98 -> 88 -> 98