Chloe WilsonKevin Borjas missed weight by three pounds before UFC Vegas 119 on 20 June 2026 — and still beat undefeated André Lima by unanimous decision. The result has reignited debate about one of combat sports' most dangerous and least-regulated practices: extreme weight cutting.
For the thousands of Australians competing in MMA, Muay Thai, boxing, and judo at amateur level, the drama at the Meta APEX weigh-ins is a timely reminder that what happens between fight camps is just as important as what happens in the cage.
What Happened at UFC Vegas 119
Brazilian flyweight André Lima walked into the arena on the night of 20 June 2026 with a perfect 11-0 professional record and was considered the clear favourite by most analysts. His opponent, Peruvian fighter Kevin Borjas, had already failed the official weigh-in — stepping on the scale at 129 pounds, three pounds heavier than the 125-pound flyweight limit.
Under UFC rules, the bout continued at a 129-pound catchweight, with Borjas forfeiting 20 per cent of his purse to Lima as a financial penalty. Despite the controversy, Borjas delivered arguably the biggest upset in UFC flyweight history in 2026, winning by scores of 30-27, 29-28, and 29-28. Lima's flawless record was gone.
The result immediately prompted questions: did Lima suffer any disadvantage from competing against a heavier opponent? And what does Borjas's weight miss reveal about the physical and medical realities of cutting weight in modern MMA?
The Hidden Realities of Weight Cutting
Weight cutting is the practice of rapidly losing kilograms before a sanctioned weigh-in through dehydration, caloric restriction, and sometimes heat exposure — only to rehydrate aggressively before competing. It is standard practice at virtually every level of combat sport worldwide.
In Australia, amateur fighters from Sydney to Perth replicate these techniques without medical guidance. A 2013 peer-reviewed study published in the Journal of the International Society of Sports Nutrition found that 39 per cent of MMA fighters compete while still clinically dehydrated, even after attempting to rehydrate between the weigh-in and the bout. The Western Australian Department of Local Government, Sport and Cultural Industries has published a Contestant Safety Strategy to Address Rapid Weight Loss by Dehydration — one of the few government-level documents in Australia specifically addressing the problem.
Despite this guidance, enforcement at the amateur level remains minimal. Fighters cut weight unsupervised and often dangerously.
5 Health Risks Every MMA Competitor Should Know
1. Kidney Damage and Renal Failure
Severe dehydration forces the kidneys to work at extreme capacity to maintain electrolyte balance without adequate fluid. UFC veteran Jim Miller disclosed that he discovered blood in his urine following a weight cut and subsequently developed kidney stones. Sports medicine specialists consistently identify acute kidney injury as the most under-reported consequence of extreme cutting. Any fighter experiencing lower back pain, dark or reduced urine output, or swelling in the extremities during or after a cut should seek immediate medical assessment.
2. [Reduced Brain Cushioning](/au/news/jack-della-maddalena-ufc-perth-combat-sports-brain-health-2026)
The brain is suspended in cerebrospinal fluid that acts as a natural shock absorber. During dehydration, the volume of this protective fluid drops — meaning fighters enter the cage with measurably less protection against head trauma. Research published in neurological journals has found that even mild dehydration significantly increases the probability of concussion after a given impact. Previous reporting on long-term brain health risks for Australian UFC competitors has highlighted how these risks compound across multiple fight camps. For fighters cutting weight repeatedly across a career, the neurological cost may not become apparent for years.
3. Cardiovascular Stress
When blood volume decreases due to dehydration, the heart must pump harder and faster to deliver oxygen to working muscles. This increases resting heart rate and can trigger arrhythmias — irregular cardiac rhythms — particularly during high-intensity effort. Several combat sports deaths globally have been linked to cardiac events occurring during or shortly after extreme weight cuts. Fighters with any pre-existing heart condition, even undiagnosed, face substantially elevated risk.
4. Muscle Weakness and Performance Deterioration
Muscle tissue is composed of approximately 75 per cent water. Research consistently shows that a body weight loss of just 2 per cent through dehydration measurably reduces muscular strength, coordination speed, and reaction time — even after rehydration. Some commentators reviewing the Lima versus Borjas scorecards noted signs of fatigue in Lima's footwork and defensive timing in the championship rounds, raising questions about whether the physical toll of making weight contributed to his performance on the night.
5. Long-Term Hormonal Disruption
Repeated cycles of severe caloric restriction and dehydration across multiple fight camps can disrupt the body's production of testosterone, cortisol, and growth hormone. Over time this impairs muscle recovery, reduces lean mass, and has been associated with depression and chronic fatigue in retired combat athletes. For fighters planning to compete three or more times in a single year — as Lima publicly stated was his goal for 2026 — the cumulative hormonal load of repeated cuts represents a significant long-term health risk.
When Should You See a Doctor?
If you are preparing for a sanctioned amateur or professional bout and planning a weight cut, a GP or sports medicine specialist can help you build a plan that meets your weight targets without compromising your health. The WA government's guidance recommends medical supervision for any fighter cutting more than 5 per cent of their body weight in the days before competition.
Seek urgent medical attention if you experience any of the following during a weight cut:
- Dizziness or loss of consciousness
- Muscle cramps that do not resolve with hydration
- Heart palpitations or chest tightness
- Dark brown urine or inability to urinate for several hours
- Confusion, slurred speech, or extreme cognitive impairment
These are not signs of a successful cut. They are warning signs of a medical emergency.
Fighting Smarter in 2026
André Lima's stunning defeat at UFC Vegas 119 will be debated for months. But the story of Kevin Borjas arriving at the scale three pounds heavy — and walking away with a unanimous decision win — is also a story about the physical costs and uncertainties that weight manipulation introduces into combat sports.
For Australian gym competitors watching UFC events and applying professional-level weight-cutting techniques to amateur training environments, the message is clear: the risks are real, cumulative, and potentially irreversible. Consulting a sports medicine professional before beginning any rapid weight loss programme ahead of a fight is not optional — it is fundamental to competing safely and sustainably.
This article is for informational purposes only and does not constitute medical advice. Consult a qualified health professional before undertaking any weight management programme.
