The Landmark Study on Longevity
The conversation around exercise and longevity received a significant update from a large-scale study published in the British Journal of Sports Medicine. Researchers from the Harvard T.H. Chan School of Public Health analyzed three decades of data from nearly
150,000 health professionals. This long-term approach allowed them to connect different exercise habits with the risk of dying from any cause, providing one of the clearest pictures yet of how specific workout routines impact our health over time. Unlike past research that often looked at aerobic or strength training in isolation, this study specifically investigated the combined effect of doing both.
The 'Lowest-Risk' Exercise Formula
The study identified a powerful combination for reducing mortality risk. The greatest benefit—a remarkable 45% lower risk of death from any cause—was seen in individuals who paired consistent aerobic activity with a specific amount of strength training. The lowest-risk pattern involved performing at least 150 minutes of moderate-to-vigorous aerobic exercise per week, combined with approximately 90 to 120 minutes of strength training weekly. This blend proved more effective than focusing heavily on just one type of exercise, highlighting the synergy between cardiovascular fitness and muscular health.
Why the Combination Is So Powerful
Aerobic exercise and strength training offer distinct but complementary benefits. Aerobic activities like running, cycling, or brisk walking are well-established champions of cardiovascular health, improving heart and lung function. Strength training, on the other hand, builds and preserves muscle mass, which is crucial for maintaining metabolic health, supporting bone density, and preventing injury. Combining them creates a holistic fitness routine. The study found this mix was particularly effective at lowering the risk of death from cardiovascular disease (a 19% reduction) and neurological conditions like dementia (a 27% reduction) for those doing 90-120 minutes of strength work.
Hitting Your Aerobic Target
Meeting the goal of 150 minutes of moderate aerobic activity per week is more achievable than it sounds. This breaks down to just over 20 minutes a day. Moderate intensity means you can still hold a conversation, but you're breathing noticeably harder. Activities like a brisk walk, a steady bike ride, dancing, or even vigorous gardening all count. If you prefer higher intensity, the recommendation is 75 minutes per week of vigorous exercise, such as running or swimming laps, where you can only speak a few words at a time. Any combination of moderate and vigorous activity can get you to the goal.
Making Strength Training Approachable
The ideal 90 to 120 minutes of strength training per week can be split into two or three sessions. Importantly, the study found that doing more than 120 minutes did not provide additional mortality benefits, suggesting a point of diminishing returns. Strength training doesn't have to involve a gym or heavy barbells. Bodyweight exercises like push-ups, squats, and lunges are highly effective. Resistance bands offer another accessible and low-cost option. The key is to challenge your muscles with resistance, whatever the source. Two full-body workouts of 45-60 minutes each week would perfectly align with the study's findings.
