Final answer:
While a significant correlation exists between exercise and lifespan, showing that people who exercise more tend to live longer, correlation does not establish causation. Exercise is beneficial and associated with various health advantages, but numerous factors affect life expectancy.
Step-by-step explanation:
A significant correlation (r=.86) between the amount of exercise and the number of years lived has been observed. This strong correlation suggests a relationship where people who exercise more tend to have increased life expectancy. However, correlation does not imply causation. It means that while exercise is associated with longer lifespan, it does not conclusively prove that exercise directly causes people to live longer.
Studies, such as those by Larson et al. (2006), do show that exercise is associated with a reduced risk for incident dementia and other health benefits. Yet, personal preferences and expenditures on health care play a complex role in influencing health outcomes like life expectancy. Therefore, although the exercise is beneficial and recommended at levels set by the U.S. Department of Health and Human Services (HHS), many factors can contribute to overall longevity.
Adopting a healthy lifestyle, including regular physical activity, is crucial for maintaining overall health and potentially increasing one's years of life. It is also related to several other health benefits, including maintaining a healthy weight, regulating digestive health, and promoting psychological well-being.