The Utility of Measures of Physical Behavior, Function, and Fitness as Predictors of Mortality https://www.mcpiqojournal.org/article/S2542-4548(26)00017-2/fulltext The simple measure that can predict your lifespan better than invasive tests https://www.dailymail.co.uk/health/article-15694759/simple-measure-predict-lifespan-walking.html The walking pace was the strongest single predictor of death