The ‘Murph’ challenge: what to know about this CrossFit workout
The ‘Murph’ challenge: what to know about this CrossFit workout: Dusan Petkovic/Shutterstock Meta boss Mark Zuckerberg recently shared on Facebook and Instagram that he had completed the “Murph” challenge, which is named for Navy Lieutenant Michael Murphy, who was killed in Afghanistan in June 2005, aged 29. This gruelling CrossFit workout involves running one mile, …