As a person ages, the brain gradually shrinks, losing about 5% of its volume per decade after age 40, impacting its functionality. In a pioneering study, neuroscientists investigated how regular aerobic exercise affects the hippocampus, the brain region responsible for memory.
Centenarians are exceptional in that they avoided the diseases, stresses, and misfortunes that claimed the lives of others in their generation. To truly understand how to extend life, it's more useful to study the reasons why most people don't reach 100, and address those factors, rather than focusing on those who may have simply been fortunate in terms of lifestyle or genetics.
According to a recent study, 20 years of a sedentary lifestyle is linked to two times the risk of premature death when compared to being physically active. The HUNT study’s findings suggest that in order to get maximum health benefits from physical activity to protect against premature cardiovascular and all cause death, a person needs to be continually physically active.