Dr. Henry Lodge provides the science. Chris Crowley provides the motivation. And through their New York Times bestselling program, youâ€™ll discover how to put off 70 percent of the normal problems of agingâ€”weakness, sore joints, bad balanceâ€”and eliminate 50 percent of serious illness and injury. Plus, prominent neurologist Allan Hamilton now explains how following â€œHarryâ€™s Rulesâ€ for diet, exercise, and staying emotionally connected directly affects your brainâ€”all the way down to the cellular level. The message is simple: Learn to train for the next third of your life, and youâ€™ll have a ball.