Telomere length and longevity are strongly correlated (& so too is your grip strength). As we age, our telomeres get shorter. Stress has been strongly correlated in shortening telomeres. Short telomeres in white blood cells is strongly correlated with diabetes and heart disease. Puterman et al. 2010 studied 63 post-menopausal women. The results indicated that 75 minutes a week of vigorous exercise slows down the shortening of telomeres. This corresponds with the CDC’s recommendations of 60-75min of vigorous exercise each week for health benefits. The hormonal cocktail released by vigorous exercise continues to regulate all functions of the body, even something as unrelated as the longevity of individual cells. Train harder, live longer.