Initial hypotheses about the Hadza's fitness being due to high walking distance were contradicted by energy expenditure studies showing similar daily energy expenditure to desk workers.

“so um researchers actually from duke university initially did these studies and they they had a hypothesis which was a really good hypothesis that you know the hadzas the men walk oh wait 10 miles a day the women didn't walk three to five miles a day you know gathering i know jesus paul you didn't eat all the tubers they ate did you oh my god i'll tell you about the tubers i have a story about the tubers i did eat the tuba because i'm a i wanted to be an expert yeah i didn't eat the t-rex but i'll tell you about them yeah and you're not dead that's amazing i didn't die but we spit out the fiber so this this is coming there's a punch line here all right so anyhow so they they looked at the energy expenditure of the hodzos and they compared it to desk workers and their hypothesis was that the hazards are so fit and trim because they're using up tons of energy and the desktop workers are just sitting there doing nothing and lo and behold when they actually looked at energy expenditure they found that the hodzos and the desktop workers actually used up the same amount of energy expenditure every day”