One key to staying younger longer therefore seems to be related to the question: How do we slow down, stop, or even reverse the shortening of telomeres? Genetics and unhealthy lifestyle are important contributors to telomere shortening, along with psychological stress. Based on this knowledge, researchers have examined how much lifestyle can influence telomere length. Recent studies suggest that telomeres can change faster than previously thought, possibly taking just one to six months of mental or physical training to elongate. The exciting premise is that telomere lengthening may represent a reversal of biological aging processes. However, it remains unclear if telomere elongation actually reflects any improvement in a person’s overall health and aging trajectory.