Harvard researchers found that 90 to 119 minutes of weekly strength training is associated with a 13% lower risk of death from any cause [1].
This finding suggests that targeted resistance exercise may provide significant longevity benefits and potentially reduce the risk of developing dementia. As global populations age, identifying scalable lifestyle interventions to maintain cognitive and physical health remains a critical priority for public health.
The study analyzed a sample size of over 147,000 adults [1]. Researchers determined that individuals who engaged in strength training for 90 to 119 minutes per week [1] saw the most notable correlation with increased longevity. This specific duration of exercise was linked to the 13% reduction in all-cause mortality [1].
Beyond the reduction in death risk, the researchers noted that this exercise habit may also slash the risk of dementia [1]. While the study focused on strength training, the results highlight the role of muscle-building activities in overall health maintenance, a contrast to other theories suggesting sleep or a sense of purpose as primary drivers of cognitive preservation.
The researchers said that strength training may improve overall health to lower both mortality and dementia risk [2]. The data underscores a potential threshold for exercise where the most significant benefits are realized, suggesting that consistency in resistance training is key to long-term health outcomes [1].
“90 to 119 minutes of weekly strength training is associated with a 13% lower risk of death”
These findings contribute to a growing body of evidence that skeletal muscle mass and strength are biomarkers for overall health. By quantifying a specific time window — roughly 1.5 to 2 hours per week — the study provides a concrete target for clinicians and individuals seeking to mitigate the risks of age-related cognitive decline and premature death.
