As a daily runner that makes a LOT of sense. I wouldn't have been able to put my finger on it and express it but a similar idea has already been told to me, in another context, in another form.

I also think the conclusion of the research and the poster you responded to is rather wrong. It doesn't matter how long you live if that longevity isn't pleasantly usable. From the elderly I take care of around me, I would rather die sooner from some random disease than live longer and be as useless as they are (both physically and cognitively).