How many studies support Running?

A meta-analysis and large cohort study both show that running, even in modest weekly amounts, is associated with meaningfully lower all-cause and cardiovascular mortality compared to not running, and broader cardiorespiratory fitness meta-analyses support the same general pattern. That's backed by 4 published studies in Vitaebase's database, including 2 meta-analyses, the most recent from 2020 -- a modest but real research base.