The Best of Both Worlds
The age-old question of whether to focus on running shoes or dumbbells has finally received a compelling answer. According to a large-scale study published in the British Journal of Sports Medicine, combining regular aerobic exercise with strength training
provides the most significant benefits for longevity. Researchers from the Harvard T.H. Chan School of Public Health tracked nearly 150,000 adults over three decades to understand how different exercise habits affected mortality risks. The results were clear: while either type of exercise is good, doing both is demonstrably better. Participants who combined both strength and aerobic training had up to a 45% lower risk of dying from any cause compared to those who did neither.
Finding the Strength 'Sweet Spot'
One of the most significant findings from the research was the identification of a 'sweet spot' for strength training. The study revealed that individuals who engaged in 90 to 120 minutes of resistance training per week saw a 13% lower risk of premature death from any cause. This amount was also associated with a 19% lower risk of death from heart disease and a 27% lower risk from neurological conditions like dementia. Interestingly, the study found that doing more than 120 minutes of strength training per week did not seem to provide additional longevity benefits. This suggests that a moderate, consistent approach to strength work is highly effective, and can be achieved with just two or three focused sessions a week.
Cardio Remains King for Longevity
While the study highlights the powerful, distinct benefits of strength training, it also reinforces the critical role of aerobic activity. The researchers noted that while any exercise is better than none, aerobic activity provides a slightly greater overall benefit for reducing mortality risk when compared to strength training alone. The lowest overall mortality risk was observed in people who met aerobic guidelines—at least 150 minutes of moderate activity per week—and also incorporated that 90-120 minute sweet spot of strength training. This combination appears to create a synergistic effect, where each type of exercise enhances the health benefits of the other, leading to improved cardiovascular health, better metabolic function, and a more resilient body overall.
Putting It All Together: Your Weekly Plan
So what does this mean for your workout routine? The research provides a clear and achievable template. Aim for at least 150 minutes of moderate aerobic exercise per week. This could be 30 minutes of brisk walking five days a week, a few longer runs, or cycling sessions. Then, add two to three strength training sessions, totaling between 90 and 120 minutes for the week. This could be full-body workouts using weights, resistance bands, or even bodyweight exercises like push-ups and squats. The long-held fear that cardio might 'cancel out' strength gains—a phenomenon known as the 'interference effect'—has been largely recontextualized by modern research. Studies now show that for most people, this effect is minimal and can be managed by separating sessions or simply fueling and recovering properly. The combination, it turns out, is what makes you truly strong and healthy for the long haul.
