This week, the NY Times cited a Cooper Institute study that found running is correlated with a higher increase in life span than any other exercise. (“An Hour of Running May Add 7 Hours to Your Life” – see link below).
The study’s authors acknowledge this is a “correlation” and not “causation” finding. Quick illustration of causation vs. correlation. A guy keeps finding when he sleeps with his clothes and shoes on, he wakes up with a headache. Did sleeping that way cause the headache? No, it was correlated with it (they frequently happen together), with the common root cause being tequila the night before.
My hunch is this finding is an important correlation between running and positive lifespan impact. It’s not the running itself causing incremental benefit vs. other exercise types. Other exercises or mixes thereof can provide the same physical and mind-body benefits. It’s that, critically, runners are likely to have an “Architect” view of their own fitness, and associated sustainable behavior patterns. These are the causative factors behind maximum exercise impact.