Mike Tyson is undoubtedly one of the greatest men to ever step into a boxing ring.

Reigning as the undisputed world heavyweight champion from 1987 to 1990, Tyson won his first 19 professional fights by knockout, 12 of which came in the first round.

To this day he still holds the record of the youngest boxer ever to win a heavyweight title, claiming his first belt when he was just 20.

Mike Tyson's 30-year physique journey

Throughout his career, and even into his retired life Tyson has aged superbly, with photos of his transformation showing he is just as stacked as he was during his peak in the late 80s and early 90s.

In November 2020 he fought Roy Jones Jr. in an eight-round exhibition bout, which was controversially declared as a draw, despite CompuBox numbers showing Tyson outclassed Jones by quite a margin.

But just how has Tyson managed to keep himself in such good condition?

LOS ANGELES, CALIFORNIA - NOVEMBER 28: Mike Tyson exits the ring after receiving a split draw against Roy Jones Jr. during Mike Tyson vs Roy Jones Jr. presented by Triller at Staples Center on November 28, 2020 in Los Angeles, California. (Photo by Joe Scarnici/Getty Images for Triller)

How has Mike Tyson maintained his physique?

According to The Sun, Tyson consumes anywhere between 3,000 to 4,000 calories a day, including three meals and two snack periods.

In addition, ‘Iron’ wakes up at 4am every day for a three-to-five-mile jog.

He then heads straight to the gym for a boxing session, usually comprising of 10 rounds of sparring.

To finish he would then focus on muscle and use his own weights for squats, tricep extensions and push ups, before some more sparring and skipping and a light recovery on his exercise bike.

Mike Tyson's 30-year body transformation is elite

Mike Tyson has maintained an incredible physique

With such a brutal and physical daily routine, it is not hard to see why some say Tyson is the greatest heavyweight ever and how he has unbelievably managed to keep so in shape all these years on from when he made his heavyweight boxing debut.

However, in recent weeks, the great Tyson has been pictured in a wheelchair, looking uneasy as fans grew concerned.

Mike Tyson using wheelchair after sciatica confirmation

Tyson was also seen using a walking stick to help him move around, and in an interview, he did with Newsmax TV, the heavyweight great revealed that he is suffering from sciatica.

Sciatica is where the sciatic nerve is irritated or compressed, usually lasting for four to six weeks, but can sometimes last longer.

Tyson reassured his fans that he has no other issues they should be worried about.

“Thank God it’s the only health problem I have”, Tyson said, speaking to Newsmax. “I’m splendid now. Everybody in my house is truly blessed and we’re all very grateful for whatever we have.” Fans of Tyson will be relieved at this information and will continue to support arguably the greatest heavyweight of all time