Evolutionary biologists reveal how exercise unlocks human longevity
Harvard evolutionary biologists propose that humans' exceptional longevity compared to other primates evolved because our ancestors needed to stay physically active and healthy into old age to provision and care for their grandchildren—a role requiring sustained energy expenditure that our bodies are biologically designed for. The research suggests that physical activity in later life evolved to regulate fat storage and reproductive hormones while simultaneously triggering cellular repair processes, and modern sedentary lifestyles create a dangerous mismatch between our activity-dependent biology and our desk-bound existence. The authors argue that maintaining lifelong physical activity, particularly in older age, is essential to preventing the chronic diseases of aging that plague industrialized societies where humans are uniquely inactive.