|Source: Kyle Cassidy|
“Just because you’re 40, doesn’t mean you’re 40 years old biologically,” said Larry Tucker. “We all know people that seem younger than their actual age. The more physically active we are, the less biological ageing takes place in our bodies.” The marker of biological aging that he and the other researchers measured was telomere length. These are protective caps of DNA which sit on the end of our chromosomes, and unfortunately usually shorten with each cell division. As lack of telomeres means cell death, longer telomeres are associated with longevity, and high-intensity exercise meant longer telomeres. This study echoes another which showed that HIIT (high-intensity interval training) has significant antiaging effects. It also echoes yet another on running; this one found that running one hour can add, on average, seven more hours to your life. These benefits stopped at about three extra years of life, and four hours of running a week. Overall, presidents are not always right, physical activity has been repeatedly shown to extend average lifespan.