Aerobic Physical Activity

What the evidence says

WHO recommends that adults accumulate 150 to 300 minutes of moderate-intensity aerobic activity per week, 75 to 150 minutes of vigorous activity, or an equivalent combination. Some activity is better than none, and inactive adults should increase volume and intensity gradually.^[1]

The 1,635-person LIFE randomized trial provides direct healthspan evidence. Over a median 2.6 years, a structured moderate-intensity physical-activity program reduced major mobility disability from 35.5% to 30.1% in sedentary older adults at risk of disability.^[2]

Device-measured cohort evidence shows a strong inverse dose-response between physical activity and all-cause mortality, with the largest practical gain when inactive people become at least somewhat active. Because this evidence is observational, healthier people may also be more able to move.^[4][5]

Generation 100 did not show significantly lower five-year all-cause mortality from supervised high-intensity or moderate continuous training versus advice to follow national activity guidelines. Its comparison group was active and often exercised vigorously, so it tested supervised strategies rather than exercise versus inactivity.^[3]

Exercise-associated sudden cardiac events are rare but more likely during unfamiliar vigorous exertion, and musculoskeletal problems rise when volume increases too quickly. Symptoms, unstable disease, severe frailty, or long inactivity can justify individualized progression rather than avoiding movement altogether.^[5][1]