Anthony Joshua performed one of Mike Tyson's astonishing exercises to make his neck rock solid.
Joshua implemented Tyson's grueling 'front neck bridge' training regime ahead of his fight against Alexander Povetkin last year and he has continued using this method in camp.
The painful-looking workout consists of rocking your neck back-and-forth which strengthens the muscles.
Tyson, renown for having a tree trunk for a neck, made this exercise famous during his prime. The workout can also reduce the risk of concussion.
Anthony Joshua doing Mike Tyson's intense neck workout :eyes::scream: pic.twitter.com/rCihw1s0in- KO KINGS (@KOKINGS4) September 30, 2019
Joshua vs. a prime Tyson is still a bout many boxing fans fantasise about, but the current unified heavyweight world champion doesn't like his chances against 'Iron' Mike.
In an interview back in 2017, he honestly said: "Mike Tyson would have battered me!
"There was no way I could have taken on that guy. I would have taken that pay cheque. You know what I done against Klitschko in that 6th round when I took that dive? I'm joking.
"I would have taken a dive against Tyson. He was a beast. I give all credit and respect to Tyson. Even though Tyson is going on like 50 now, I still remember Tyson as the young, young 21-year-old.
"He was that good and made such an impact in the sport of boxing," he added.
Meanwhile, Joshua reclaimed the heavyweight belts last weekend after he schooled Andy Ruiz Jr in Saudi Arabia. He outpointed the Mexican-American to win the WBA (super), IBF and WBO titles.
He's set to begin his second reign as heavyweight king by defending his titles against either IBF mandatory challenger Kubrat Pulev or WBO mandatory challenger Oleksandr Usyk.