We didn't know anything about diet thousands of years ago beyond "this tastes nice" and "I'm hungry", we merely endured starvation, prions, and scurvy… or died because we couldn't endure it. Sometimes we just got lucky with good fishing or fertile farmland, but we were never in control.
I'm not confident enough about the history of exercise to make an equivalent claim for that.
I'm not confident enough about the history of exercise to make an equivalent claim for that.