In Racing Against Time, Jeff Weiss shares the story of his late middle-age transformation. Weiss went from running a first 10K race at age 48 to becoming an Ironman and ultramarathoner by his late 50s. Along the way he discovers the extraordinary physical and emotional benefits that flow from chasing ever-increasing fitness goals. Weiss’s journey shows us that we have the power to influence how we age, that goal-setting and adventure are not solely the province of the young. At a time when so many of us are looking for ways to increase our health span – that portion of life that we spend in good health – Weiss’s story shows us one way to get there.