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Sports and recreation

Running

Estimated acute risk associated with recreational or fitness running.

Base risk estimate

0.02 micromorts per miles

Population-level estimate. Not a personal prediction.

Assumptions

Assumes recreational or fitness running on roads, trails, or sidewalks by a generally healthy adult at a moderate training pace.

Limitations

Risk varies by route type (road vs trail), traffic exposure, health conditions, and running intensity. Marathon racing (~0.27 µmt/mile) carries substantially higher cardiac risk than recreational training. This estimate should be replaced with a sourced epidemiological study covering general running populations.

Source notes

Placeholder value for development only. Estimate anchored between two known reference points: (1) road cycling at 0.015 µmt/mile (UK DfT 2022, traffic fatalities) — runners have comparable road exposure per mile; (2) marathon racing at ~0.27 µmt/mile (Kim JH et al., N Engl J Med 2012;366:130-40) — recreational training pace carries far lower cardiac risk than race conditions. A value of 0.02 µmt/mile reflects road-exposure risk similar to cycling, with a small cardiac component for training-pace running. Per-mile fatality data for general recreational running is not directly published in national surveillance systems.

Last reviewed

6/10/2026

RiskLens is an educational tool. It uses population-level estimates to help explain relative risk. It is not a prediction of your personal risk and should not be used as medical, legal, financial, or safety advice.