David Beckham flaunts his muscles for Guy Ritchie's gruelling push-up challenge

David Beckham has set pulses racing in a series of Instagram videos as he takes on Guy Ritchie's 22 push-up challenge. The 41-year-old caused a frenzy amongst fans as he flaunted his impressive muscles for the fitness task, from working out on a plane to posing in his underwear on a grand piano at a hotel.

David Beckham kicked off the challenge during a flight

The handsome footballer revealed that Guy has asked him to do 22 push-ups consecutively for 22 days, in a tribute to the 22 servicemen who commit suicide a day due to suffering from PTSD. He's not the only famous face to take part – Charlie Hunnam and Jason Statham have also accepted Guy's challenge.

The father-of-four explained that he immediately accepted because the cause meant a lot to him. "I've been to Afghanistan, I've seen the courage of our troops," he explained in one clip, adding he would do "anything I can do to raise awareness for the situation."

He also posed on a grand piano in his underwear for a quirky video

In one clip, although David was heading abroad, he made use of his downtime during the flight to complete his first 22 push-ups – and he took the opportunity to nominate son Brooklyn Beckham, as well as friend and Jennifer Aniston's husband Justin Theroux.

"So my lovely friend Mr Guy Richie the film maker and supreme athlete has nominated me to do 22 press ups consecutively for 22 days (and by the way his challenge was that I do my first lot at 44,000 feet as he knows I'm travelling)," he explained in the accompanying caption.

© Photo: Getty Images

David is raising awareness for servicemen suffering from PTSD

He continued: "This isn't one of his daily routines where he likes to teach u a lesson and beat you, it's for a very good reason... 22 service men kill themselves post conflict... 22 a day, basically 1 an hour.

"So I am doing what Guy R , Jason S and Charlie H are doing and supporting , respecting and appreciating all the service men and women and their sacrifice ... we shine a light to support and help save lives ... @guyritchie @justintheroux @brooklynbeckham."