We earn a commission for products purchased through some links in this article. Why Trust Us? We developed the 7-Hour Workout Week, detailed in our book Train Smart, Run Forever, to help runners increase the likelihood that they will log miles well past their 50s. As athletes, coaches, and exercise scientists, we want to be able to keep doing what we love—and that’s probably a goal of yours, too. We believe that an effective cooldown routine can help runners stay on the road by improving the transition between the run they just finished and the one they will do next. The two of us—both longtime runners who have dedicated many years at the Furman Institute of Running and Scientific Training (FIRST) in Greenville, South Carolina—know runners want to get faster and enjoy the sport for life, but we also hear from those who’ve given up on running entirely. Many stop because of injuries.…