Michael Klim, Olympic Gold Medalist, Reveals Six-Year Battle with Incurable Autoimmune Disorder CIDP

Key facts

• Michael Klim was diagnosed with chronic inflammatory demyelinating polyneuropathy (CIDP) in 2020.
• CIDP is an incurable autoimmune disorder that attacks nerve fibers, causing muscle weakness and sensory loss.
• Klim won gold at the Sydney 2000 Olympics and set 21 world records during his career.
• He undergoes IVIG treatment every six weeks to manage the condition.
• Klim proposed to Michelle Owen on December 24, 2025, and she accepted.
• He will appear on Australian Story on February 2, 2026, to share his journey.
• Klim had serious back surgery in 2020 to decompress nerves in his spine.

A Fall at Kuala Lumpur Airport That Changed Everything

In late 2019, Michael Klim’s legs gave way beneath him at Kuala Lumpur airport. The former Olympic champion, then 46, collapsed onto the floor, unable to walk. Distraught, he called Michelle Owen, a woman he had met only months earlier at a bar in Bali. Klim had told Michelle from the start that his unsteady gait was not due to alcohol but because “something wrong with my legs.” It would take six months of testing before doctors delivered the diagnosis: chronic inflammatory demyelinating polyneuropathy, or CIDP, a rare autoimmune disorder that attacks the protective sheath around nerve cells, causing progressive muscle weakness and sensory loss. “When you’re seeing your muscles wasting away in front of your eyes, no matter how many exercises you do, that was kind of a sign that there was something happening,” Klim later recalled.

The Diagnosis That Stripped Away an Identity

Klim received the official CIDP diagnosis in 2020, a moment he describes as having his identity taken away. “Six years ago, my identity was taken away and I couldn’t see a future,” he said in a teaser for Australian Story. The physical toll was immediate and severe. Muscle wastage, chronic pain, fatigue, and sensory loss left him unable to walk without assistance; he had little or no sensation in his feet. “The physical degradation is one thing, but the mental issue was probably the biggest hurdle to overcome,” Klim added. In 2020, he underwent serious back surgery in Australia to decompress the nerves in his spine. He continues to fly back and forth for intravenous immunoglobulin (IVIG) treatment, a plasma-derived therapy he receives every six weeks. “I’ll be doing that while I’m in Sydney this time,” he said during a recent appearance on The Morning Show.

Michelle Owen: The Partner Who Became His Rock

Klim met Michelle Owen just before his diagnosis, and she has been his unwavering support ever since. After his collapse at the airport, she stayed by his side, becoming both partner and caregiver through the most difficult periods. “I said to her that you’ve got the dud version of Michael Klim,” he reflected, adding that he told her, “I don’t want you to have to live with this burden.” Michelle never flinched. “The best thing and the brightest thing that happened is obviously, I met Michelle,” Klim told Australian Story. “Meeting my partner … [was] a shining light for me out of that bad period.” On December 24, 2025, Klim announced on social media that he had proposed to Michelle on Victoria’s Mornington Peninsula. “SHE SAID YES!” he wrote, captioning a carousel of photos. “She is pure heart. Deeply kind. Steady when it mattered most.”

From Olympic Glory to a New Kind of Strength

Michael Klim was once the face of Australian swimming. He won gold at the Sydney 2000 Olympics in the 4x100 metres freestyle relay, setting a world record on the first leg with his trademark straight-arm technique. Over three Olympic Games, he amassed six medals, and he holds 21 world records. His image—the bald head, the explosive power—made him one of the most marketable athletes of his era. He appeared on the cover of the official Sydney 2000 program and was a poster boy for the Games. But after the CIDP diagnosis, that physical identity crumbled. “I thought everything was based on what I could physically do,” Klim said. “I feel like now I’m no less of a person or even actually, to be honest, probably a fuller person because of what I’ve been through.” Months of depression, rage, self-medication, and self-pity eventually gave way to a deeper understanding of himself.

Managing CIDP: Treatment, Training, and Hope for a Cure

Klim now lives in Bali with his family and manages his condition through a strict regimen. He undergoes IVIG treatment every six weeks, which he describes as “plasma derived medication.” While in Sydney, he continues the treatment and maintains an intense training routine as part of his rehabilitation. “I continue sort of training really hard, which is a big part of my rehab and just managing my lifestyle and my rest,” he said. “Unfortunately, I’m not able to do as much as I used to, but it definitely not only stimulates some of these muscles that have gone to sleep a little bit, but you know, definitely gives me more motivation.” Despite the challenges, Klim remains hopeful. “So far, so good. But hoping for some medical advance in the future that I can hopefully get a cure for CIDP,” he said. “You work out like a demon, I do enjoy it. It’s for me, it gives me a bit of mental toughness.”

A Public Journey: From Sunrise to Australian Story

Klim has been open about his battle with CIDP, using his platform to raise awareness and support others with the condition. In February 2023, he appeared on Sunrise to discuss the diagnosis. “It has obviously been a challenging three or four years since the diagnosis, but I think I have accepted what I’ve got and I’m trying to make the most of it,” he said then. He is set to share an update on Australian Story when it returns for its milestone 30th season on February 2, 2026. The episode will delve into his journey, his relationship with Michelle, and how he has rebuilt his life. “I have a great support crew, obviously my family, my partner Michelle, and it does take more than one person to get through this and it has been pretty challenging but I am upbeat and pretty positive,” Klim said.

Redefining a Life Beyond Physical Prowess

Klim’s story is one of reinvention. The man who once defined himself by his athletic achievements has learned that strength comes in many forms. “Six years ago, my identity was taken away and I couldn’t see a future,” he said. But through the support of Michelle, his family, and his own determination, he has found a new purpose. “I feel like now I’m no less of a person or even actually, to be honest, probably a fuller person because of what I’ve been through,” he reflected. The Olympic gold medalist, now 48, continues to fight CIDP with the same grit that made him a champion, but with a deeper understanding of what truly matters. As he awaits a potential cure, Klim remains committed to his treatment, his training, and his loved ones. His journey serves as a testament to resilience in the face of an incurable disease.

The bottom line

• Michael Klim was diagnosed with CIDP in 2020 after collapsing at Kuala Lumpur airport in late 2019.
• CIDP is an incurable autoimmune disorder that causes muscle wasting, chronic pain, and sensory loss.
• Klim undergoes IVIG treatment every six weeks and had back surgery in 2020 to manage symptoms.
• His partner Michelle Owen has been a constant support; they became engaged on December 24, 2025.
• Klim will appear on Australian Story on February 2, 2026, to share his journey.
• He has transformed his outlook, embracing a fuller identity beyond physical prowess.