Cohort Parameters
Historical Lifestyle Preset
Birth Year Scrubber
1920
1910 (Turn 100 in 2010)
1980 (Turn 100 in 2080)
Cohort Base Size
1,000,000
Lifestyle & Dosage Allocation
Daily Moderate Activity / Labor (%)
48%
Extreme Endurance (Marathons) (%)
0.002%
Competitive Bodybuilding / PEDs (%)
0.001%
Dietary Nutrition Quality
Nightly Sleep & Circadian Rest
7.5 hrs
The Demographic Selection Illusion: In the 1920 cohort, marathon running was an ultra-niche Olympic event with under 0.002% participation (~20 people per million). Even with pristine health, pure demographic scarcity explains why almost zero living 105-year-olds ran marathons. Modern running boom cohorts (1970+) won't reach 100 until 2070.
21,420
Total cohort members surviving to age 100+ (estimated 2.14%)
0.6
Expected marathoner centenarians (due to historical rarity)
0.68
Mortality hazard ratio for moderate daily walkers (sweet spot)
2020
Year cohort reached centenarian status (age 100)
Survival Curve: Decadal Attrition by Lifestyle Regimen
Moderate / Labor (Walking)
Sedentary Baseline
Extreme Marathoner
Bodybuilding / High Anabolic
Physical Activity Longevity Dose-Response Curve (J-Curve)
Cohort Archetype Demographic Breakdown
| Archetype | Cohort Pop | Hazard Ratio | Odds to 100 | Expected 100+ Survivors |
|---|