Looking For Key To Slow Aging? Study Suggests Embracing A Heart-Healthy LifestyleResearchers now say that adopting a heart-healthy lifestyle could be the key to slowing down biological aging. Severe Obesity In Childhood Halves Life Expectancy, Weight Loss Brings Back Decades: StudyA child with severe obesity at age 4 has only a life expectancy of 39 if the individual does not lose weight. However,