This is adapted from Running Strong: The Sports Doctor's Complete Guide to Injury-Free Running for Life, by Jordan Metzl, M.D. Why do you run? Because it feels good. Because it relieves stress.

Training for a road race is rewarding, and it's also hard AF. If one of your fitness goals is to run a race, there are some pretty boss free running apps to help you train for a 10K. Because, you need ...