People are weaker in many ways. I believe it is a physical phenonomen. Just look at the photos of 20-30 year olds now versus in years past. I cannot explain what is happening physiologically, but you can tell from photos that people are not as healthy as they used to be.
Correct. We are heavier, and our best specimens are FAR better than a GI in 1944, but the average is far worse off.