Several months ago, I took it upon myself to complete the 4x4x48 challenge. For the uninitiated, this challenge was created by former Navy SEAL David Goggins to test both physical and mental endurance. It consists of twelve four-mile runs in four-hour increments: four miles every four hours for forty-eight hours. You don’t get much sleep,Continue reading “The 4x4x48 Challenge: An Ultramarathon in Bite-Size Pieces”
For Runners, By Runners