[pg314]

From the abstract: However, this concept is still hypothetical and there is some inconsistency in the reported findings. Furthermore, lifelong vigorous exercisers generally have low mortality rates and excellent functional capacity.

I'll take low mortality and excellent functional capacity.

[nextos]

Sure, I'm not implying long distance running is unhealthy. I believe it is healthy, but there is some evidence some long distance running forms are unhealthy.

Thus, I wonder how that running humans hypothetically evolved with differs from what we practice as sport these days. Perhaps their pace was lower and broken into intervals.