The brutal workout that made Mark Zuckerberg share this post-gym selfie

So far, more than $2 million (£1.6 million) has been raised through the challenge.

Mr Zuckerberg shared a photograph of himself on Facebook and Instagram wearing the weighted vest, and another of his older two daughters, aged seven and five, taking part in their own shortened version of the exercises.

He said: “I try to do the Murph Challenge with the girls every Memorial Day as a tradition to honour those who defended us. This year I got it done in 39:58. The girls did a quarter-Murph [unweighted] in 15 mins!”

The Facebook boss has been sharing his fitness journey online. Recently, he achieved his goal of running a 5km race in less than 20 minutes, clocking 19 minutes 34 seconds. He finished 11th out of 885 runners in the race in California.

He then competed in his first jiu-jitsu tournament and won a gold medal.

Mr Zuckerberg started training in mixed martial arts during the pandemic, saying: “There’s something so primal about it.”

Following his latest sporting venture, commentators on Facebook were impressed.

However, one wrote: “Bro, can you leave one kind of success for us?”