D’Souza said the competition, which has been called dangerous by sport governing bodies, was an acknowledgement that doping was already widespread in international sport.

Organisers plan to have athletes attempt to break records in athletics, aquatics, gymnastics, strength and combat, and 32-year-old Magnussen is the first to publicly say he would take part.

01:35

Chinese swimmer Sun Yang gets 8-year ban for doping offences

Chinese swimmer Sun Yang gets 8-year ban for doping offences

“If they put up a million dollars for the 50 [metre] freestyle world record, I will come on board as their first athlete. I’ll juice to the gills and I’ll break it in six months,” Magnussen told the Hello Sport podcast.

The world record for the 50m freestyle is 20.91 seconds, set by Brazilian Cesar Cielo in 2009. Magnussen’s personal best is 21.52, set in 2013.

Cielo broke the world record wearing a streamlining hi-tech “super-suit”, which has since been banned from use in professional swimming.

D’Souza, called Magnussen’s move “remarkable and courageous”, and said athletes choosing to take part would receive a base salary and compete for prize money.

Games competitors would not be subject to World Anti-Doping Agency rules, a concept that has been heavily criticised by official bodies, including the United States Anti-Doping Agency (USADA) and the Australian Olympic Committee.

“We want to run the safest sporting event in history and drug testing is not about safety, it’s about fairness,” D’Souza told the Post.

“Our health screening protocols are being designed by world-leading clinicians so that we can ensure that through a set of blood tests and imaging techniques, athletes are healthy to compete.

“The last thing I want is an athlete to have a heart attack on international television, it would be terrible economically for what we’re doing [and] it would be terrible for the movement.”

D’Souza said there would be safeguards in place to protect competitors, and his organisation would “never encourage people to break the law and we would never encourage individuals to self-medicate”.

“Every athlete will be required to produce a doctor’s certificate from their own doctor outlining the fact that they have undertaken their full performance therapies regime, under clinical supervision,” he added.

“In addition, every athlete will have to undertake a rigorous full system health check-up in partnership with our physicians and clinical partners,” he said.

D’Souza also told the Post he had been contacted by athletes who are expected to compete in the Paris Olympics later this year. He would not disclose names.

Dr Lobo Louie Hung-tak, associate head of the health and physical education department at Hong Kong’s Education University, said that regardless of the checks in place, doping still posed risks.

“For sports like swimming, athletes need to push themselves to their maximum physical capacity and some [performance enhancing] drugs can have detrimental effects on the heart, so it is very dangerous,” he said.

He also questioned whether organisations would want to be associated with the event.

“The market will reveal this later, but from a sports medicine perspective, protecting the athletes’ health is our primary concern,” he said. “I also wonder what doctor would be willing to allow athletes to take such substances, it is not ethically correct.”

Lobo added that performance-enhancing drugs, such as anabolic steroids, could have both physical and psychological side effects.

The Enhanced Games is yet to confirm when the event will take place, but D’Souza said it would happen in the United States towards the end of this year or in early 2025.