Estimates how your fitness level affects annual mortality risk,
and expresses the difference in everyday risk units. Uses continuous
percentile norms and published hazard ratios anchored to US life tables.
See full methodology →
Your information
18 – 90 years
Biological sex (used for actuarial tables and fitness norms)
How to estimate your VO₂ max
How to measure grip strength
Health conditions (optional — adjusts your baseline mortality)
These shift your personal annual mortality estimate using published hazard ratios.
They do not affect the fitness category definitions; the mortality computation uses the continuous fitness model.
Applied multiplicatively (independence assumed; see methodology).
Your results
Mortality vs fitness
Annual mortality as a function of your fitness metric (continuous hazard model). Dashed teal line = your value.
Computed by integrating the
SSA 2022 Period Life Table
from your current age to 119, with mortality scaled by the fitness-level HR ratio.
This is a simplified model; actual life expectancy depends on many factors.
Important caveats
Observational data only: Strong links, but not proof of causation. Reverse causality and hidden factors may exist.
Population averages: Hazard ratios reflect group trends. Your personal risk may differ.
Fitness as a health proxy: VO₂ max and grip strength indicate fitness but don’t capture everything.
Indirect VO₂ max mapping: Mortality risk comes from estimated fitness (treadmill tests), not direct gas analysis.
Linearity assumption: Risk is modeled as a constant per fitness unit.
Constant hazard assumption:Life expectancy assumes that the proportional mortality benefit of your current fitness percentile remains constant over your lifetime.