How much exercise do I need to live longer?

The biggest leap comes with the first step: from nothing to something. People who exercise but still fall short of the official guideline already have a 20% lower risk of early death than someone who does nothing at all. That is more gain than any subsequent step upward¹.

The minimum guideline is 150 minutes of moderate activity per week, such as brisk walking or cycling, or 75 minutes of more intense activity such as running. People who meet this target have a 31% lower risk of death than an inactive person. Earlier research among Harvard alumni showed that sufficient exercise was associated with one to more than two extra years of life expectancy at age eighty².

Moving more helps further, but the benefit levels off. The maximum lies at around 450 to 750 minutes of moderate exercise per week: at that point the risk of death is up to 39% lower. Beyond that, the gains do not increase further, but exercising a great deal is not harmful either¹.

You do not need to schedule exercise in long blocks. Short, scattered bouts of one to ten minutes, such as quickly climbing stairs or walking briskly, are already associated with 34 to 52% lower mortality compared with people whose activity bouts are almost always shorter than one minute. The longer such a bout, the greater the benefit³.

Good cardiovascular fitness is a strong predictor of a longer life, and regular training demonstrably improves it. Exercise probably does not extend your genetically determined maximum lifespan, but it does increase the quality of the years gained: you stay fit and independent for longer⁴. For older adults, a combination of cardiovascular training, strength training, and balance exercises yields the most benefit; strength training is indispensable within that mix, especially in the presence of muscle loss or fragile bones⁵. Even after cancer, regular exercise appears to reduce the risk of recurrence, although that evidence is largely observational and still limited^6,7.