Significant Decrease in Physical Activity

Humans today are significantly less active than they were before the Industrial Revolution, with the average American walking about 2.5 miles a day compared to approximately 10 miles daily in the past. A notable study highlighted the activity levels of participants who lived like Australian settlers from the 1700s, showing they were 2.3 times more active than modern individuals. This suggests a profound shift in lifestyle and physical engagement as technology has reduced the need for manual effort. Additionally, research on the Hadza hunter-gatherer tribe indicates they engage in over 14 times the physical activity of contemporary Americans, emphasizing the drastic decline in activity levels over time.