Trainers explain how to complete it successfully.

It may be the mark of the beast, but for those who are trying to get fit, “6-6-6” is also a subtle shortcut to beast mode. The viral 6-6-6 walking challenge is a flexible daily fitness routine that ...

An extreme, all-or-nothing fitness regimen is going viral again as millions seek rapid weight loss and mental toughness through its relentless daily rules. But, as health experts warn the intensity ...