In a study conducted by researchers from Griffith University, it was discovered that if the least active individuals in the United States increased their physical activity to match the top 25% most active, they could potentially add five years to their lifespan, particularly for those over 40 years old. The benefits of physical activity on health have been universally acknowledged, but the extent of these benefits has been a subject of debate, until now.
Instead of relying on self-reported surveys, this study utilized accelerometry to gain a precise understanding of the populace’s physical activity levels. The findings revealed that the benefits were approximately double previous estimates. The most active 25% of people faced a 73% lower risk of death compared to their less active counterparts.
For the least active group, even a single hour-long walk could potentially add around six additional hours to their life. According to the lead researcher, Professor Lennert Veerman, this group has the most potential for significant health improvements.
Prof. Veerman explained, “For those already very active, an extra hour’s walk may not bring much added benefit. However, if the least active group over the age of 40 were to amp up their activity to match the most active group, they could potentially add an average of 11 years to their lives. Considering 25% of the population is already achieving this, it’s not an unattainable goal. Just under three hours of walking per day would suffice.”
The researchers suggested that the detrimental effects of low physical activity could be on par with smoking, citing other studies that found each cigarette could rob a smoker of 11 life minutes. Additionally, leading a more active lifestyle could provide protection against heart disease, stroke, specific cancers, and other chronic illnesses. These findings underscore the need for a revision of national physical activity guidelines.
Dr. Veerman emphasized that the benefits of physical activity on health have been grossly underestimated. Even slight increases in physical activity could lead to significant lifespan extension. He stated, “Physical activity is a potent tool that can more than halve your risk of death. By investing in promoting physical activity and creating environments that encourage movement – like walkable neighborhoods and affordable public transport – we could not only extend life expectancy but also alleviate the strain on our health systems and the environment.”
