'David Goggins, you are a mean man,' he adds, after finishing his final run. This means that if you run 4 miles in an hour, you will have 3 hours to rest or to get. I've been having protein shakes, protein bars quite a lot, just to get the calories in and try to recover as best as possible.' To pass this challenge, you will run every 4 hours 4 miles for 48 hours. 'Obviously I'm hungry, but trying to get fuel in that's not too heavy and affects the next run in two hours' time.

'One of the minor things about this that you wouldn't think about that actually makes it hard is not just the lack of recovery and sleep, it's also the fueling,' he says. His prediction soon proves accurate, and the lack of sleep contributes to his feelings of fatigue before each new run, although he tries to counteract that by having people join him for most of the 4-mile jaunts-in the daylight hours, at least. And, the entry fee is just a donation to your favorite charity (over 3 million dollars raised last year). Working through the math, if you only run, you hit 48 miles in 48 hours. Join David Goggins and people from all over the world starting at 8pm PST, Friday, March 5 in running 4 miles every 4 hours for 48 hours. He calls it the 4x4x48 Challenge: Run (or an equivalent time of any exercise) 4 miles, at the beginning of every 4 hours, for 48 hours ( ). 'I feel like that is going to catch up and bite me in the backside later on,' he adds. David Goggins 4x4x48 Challenge March 5, 2021. 'It's actually the recovery and sleep deprivation.' He calculates that each 4-mile run will take him around 40 minutes, leaving just over three hours in between each round. 'Obviously I'm covering a heck of a distance here, and it is far, but that's not the bit that's worrying me the most,' says Threlfall. (Spoiler alert: It was 'quite a tough one.') In his most recent video, Threlfall decides to try an infamously tough runner's ordeal, the David Goggins Challenge, while raising money for the Challenged Athletes Foundation.Д¬oined by the former Navy SEAL who goes notoriously hard in all of his workouts, the David Goggins Challenge (also known as the 4x4x48) involves running four miles every four hours for two straight days, at the end of which participants will have covered 48 miles in 48 hours.

Former triathlon athlete Mark Threlfall has been throwing himself into some pretty grueling ultra-running challenges this year over on the Global Triathlon Network channel, including running a half-marathon every single day for a week.

David goggins running challenge