How the quick check works
Your chronological age is the starting point. Four short answers capture everyday movement, resistance training, resting pulse and sleep. The calculator reuses the full quiz’s methodology: population-level mortality hazard ratios are translated into age differences using a Gompertz model, with conservative limits on combined effects. Factors you have not answered are neutral, rather than inferred.
Why these five answers?
Age provides the baseline. Daily steps reflect overall walking activity (Paluch et al., 2022); resting heart rate adds a cardiovascular signal (Zhang et al., 2016). Strength training captures resistance exercise (Momma et al., 2022); the full model also draws on strength and mortality research such as Leong et al., 2015. Sleep quality is a rough self-reported signal, informed by sleep-duration evidence (Cappuccio et al., 2010). These are the sources used by the full quiz’s scoring model, not a validation of this five-question combination.
A starting point, with limits
These studies describe associations across groups. They do not prove that changing an answer will change your lifespan or biological age by the displayed amount. Sleep quality is not a measured sleep duration, resting pulse has many causes, and five answers omit medical history, blood pressure, nutrition and much more. Small differences and the decimal place should not be treated as clinical precision.
The full biological age quiz uses 32 scored factors and gives per-system ages for a broader picture. Estimate only, not medical advice. Discuss health concerns with a qualified clinician.