Chronological age factor and how it may relate to physical activity?

Why does your stomach hurt a lot? Why does an athlete who runs a 100 meter race take glucose after he has run race? What are the differences between Samatha and Vipassana meditation in Buddhism? What is the average weight for a 5'1'' African American 15-year-old female? What is the proper technique for performing a piriformis stretch while seated? What causes spandex smell? How effective is a stomach wrap for belly fat reduction? Why do hot humid days pose such a risk of heat illness during vigorous physical activity? What is the tolerance in elevation of bench mark? Is running 7 miles in an hour considered good? Why can't some people squat with their heels down? How does streamlining help to reduce air resistance? How is physical fitness a relative concept? Are Protein Shakes good for Cross Country runners? How long has Buddhism existed? Why do parkinson's patients lack arm swing in gait? What are the best sources of glycogen in food for replenishing energy stores after exercise? Is boxing an aErobic sport? How can you make a person pass out? What are the benefits of incorporating a step bench into my workout routine?