Chris Bumstead: Kidney Disease, Retirement & Natural Status

When a six‑time champion steps away from the sport he dominated, the story is rarely just about trophies. Chris Bumstead, the face of Classic Physique bodybuilding, retired after his sixth Mr. Olympia win in 2024, but behind the victories lies a chronic autoimmune disease that reshaped everything—his training, his diet, and finally his decision to walk away. This article separates fact from speculation about his health, his departure, and what “natural” really means in his case.

Height: 6 ft 0 in (183 cm) ·
Contest weight: 225 lb (102 kg) ·
Mr. Olympia Classic Physique titles: 6 (2019–2024) ·
Years active: 2015–2024 ·
Date of birth: February 2, 1995

Seven key facts, one pattern: from a Canadian amateur to a six‑time champion, Bumstead’s biography is a story of discipline, early success, and a health condition that never left the spotlight.

What is Chris Bumstead’s disease?

Symptoms and diagnosis of IgA nephropathy

• Bumstead was diagnosed with IgA nephropathy in 2018, an autoimmune disease that attacks the kidneys (Sportskeeda (sports news)).
• The condition causes water retention, inflammation, and reduced muscle mass, especially in the lower body (EssentiallySports (bodybuilding coverage)).
• He has stated that it is a lifelong condition requiring regular monitoring and strict dietary management (YouTube (personal interview)).

How the disease affects his training

• According to Bumstead in a YouTube interview, urine and blood tests are used to catch flare‑ups early (YouTube (personal interview)).
• He has said that water retention and inflammation during prep forced him to adjust his training volume and diet constantly (EssentiallySports).
• After Olympia wins, he reportedly used prednisone to suppress immune activity linked to kidney flare‑ups (EssentiallySports).

What this means: Bumstead’s training prep was not just a physical grind but a constant medical balancing act, where one flare‑up could erase months of gains.

Has Chris Bumstead ever lost Mr. Olympia?

His undefeated streak in Classic Physique (2019–2024)

• Bumstead never lost the Mr. Olympia Classic Physique division. He won every edition from 2019 through 2024 (Wikipedia (career timeline)).
• His six consecutive titles are the longest streak in the division’s history (Instagram (announcement)).

Close calls and competition analysis

• In 2023, Bumstead admitted that his disease made prep a “constant fear” and that he did not want to worry about flare‑ups during contest season (EssentiallySports (interview quote)).
• Despite the health hurdles, his margin of victory never narrowed below what his competitors could close.

The pattern: even with a chronic illness, Bumstead’s dominance in Classic Physique remained unchallenged. His streak is the longest in the division’s history.

Why did Chris Bumstead retire?

Retirement announcement in 2024

• Bumstead announced his retirement after winning the 2024 Mr. Olympia Classic Physique title (Wikipedia (biographical reference)).
• He cited the cumulative toll of intense training, his kidney disease, and a desire to start a family (Generation Iron (bodybuilding news)).
• In a 2024 interview, he stated he was “no longer willing to make that sacrifice” after becoming a father (Kulturistika (fitness magazine)).

Impact of disease on his decision

• In 2023, Bumstead admitted he was “hurting myself” battling through the autoimmune disease and that he would only compete while his body allowed it (EssentiallySports (interview transcript)).
• He said he did not want to worry about flare‑ups during prep because he could not control them.

Plans for life after competition

• He has indicated on social media that he will focus on coaching and content creation (Instagram (official account)).
• A 2025 interview summary quoted him saying bodybuilding “had not been good for his health” and that he wants to shift toward hybrid athletic performance (Muscle & Fitness (fitness publication)).

For another perspective on athletes transitioning after peak careers, see Jack Riewoldt: What Is Jack Riewoldt Doing Now? Retirement & Career and Chris Judd: AFL Career, Net Worth & Life After Football.

The takeaway: retirement was not a sign of weakness but a calculated decision to prioritise long‑term health over short‑term competition glory.

Is Chris Bumstead all natural?

What “natural” means in bodybuilding

• The IFBB Pro League, under which Mr. Olympia operates, allows certain performance‑enhancing substances. The Classic Physique division is not drug‑tested (Wikipedia (Mr. Olympia rules)).
• Bumstead has never claimed to be drug‑free. He competes in a league that permits PEDs.

Chris Bumstead’s own statements on drug use

• In interviews, Bumstead has stated he uses “therapeutic” amounts of medications under medical supervision, including prednisone for kidney flare‑ups (EssentiallySports (medication report)).
• He has been open about using prescribed treatments, but he does not position himself as a natural bodybuilder.

The Natural Mr. Olympia competition

• A separate Natural Olympia exists for tested athletes, but Bumstead’s entire career has been in the untested IFBB Pro League (Wikipedia (natural bodybuilding)).
• So, by the strictest definition, he is not a “natural” competitor.

The catch: “natural” is a loaded term. Bumstead’s situation—using immune‑suppressing drugs for a medical condition—blurs the lines, but he has never claimed to be a clean athlete.

Who is world no. 1 bodybuilder?

Chris Bumstead’s status as six‑time Mr. Olympia

• Bumstead is widely considered the top Classic Physique bodybuilder in the world (Wikipedia (career highlights)).
• The “world no. 1” title in bodybuilding generally refers to the overall Mr. Olympia winner (open class). In 2024, that title went to Derek Lunsford.

Comparison with other legends (Phil Heath, Ronnie Coleman)

• Phil Heath won seven Mr. Olympia open titles (2011–2017); Ronnie Coleman won eight (1998–2005) (Wikipedia (list of winners)).
• Bumstead’s six titles in a single division set a Classic Physique record, but he never competed in the open class.

What this means: the “world no. 1” label depends on the division. In Classic Physique, Bumstead is unmatched. In overall bodybuilding, the open class champions hold that claim.

Chris Bumstead Career Timeline

• 1995 – Born in Kitchener, Ontario.
• 2014 – Wins first amateur bodybuilding competition.
• 2016 – Earns IFBB Pro card (Wikipedia (biographical reference)).
• 2018 – Diagnosed with IgA nephropathy (Wikipedia).
• 2019 – Wins first Mr. Olympia Classic Physique title (Wikipedia).
• 2020 – Second Mr. Olympia win (virtual event due to pandemic).
• 2021 – Third consecutive Classic Physique title.
• 2022 – Fourth win; publicly reveals kidney disease on Instagram (Instagram (official account)).
• 2023 – Fifth title; begins hinting at retirement.
• 2024 – Sixth consecutive win; announces retirement from competitive bodybuilding (Wikipedia).

Quotes from Chris Bumstead

I found out I had IgA nephropathy in 2018, and it’s something I’ll deal with for life.

Chris Bumstead, Instagram (2022)

Bumstead told The Bro Chat podcast in 2024 that he was no longer willing to make that sacrifice and that bodybuilding had not been good for his health (Kulturistika).

For bodybuilding fans, Bumstead’s legacy is not just his six titles but his honesty about the cost of competition. For aspiring athletes, the lesson is clear: health must come before the stage, or the stage will eventually take both. Anyone who follows the sport now knows that the real fight wasn’t on stage—it was inside his own body.

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