Early human ancestors spent centuries testing their skeletons while jogging through untamed landscapes hunting and gathering food to survive. Life is significantly easier today, and evidence of a more leisurely lifestyle is showing up in our rested bones.
Since the invention of agriculture, new research shows human bones have grown lighter and far less dense than those of early humans and closely related primates. Researchers believe sedentary lifestyles, made possible by agriculture and technology- are the root cause of human bone degradation over the past 1,000 years. Their findings reinforce the idea that exercise, not diet, is key to preventing fractures and osteoporosis.
PNAS, the official journal of the US National Academy of Sciences