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The deadly dangers of a triathlon — no matter how experienced you are

Nypost · · 1067 words · By Brooke Steinberg
The Dangers of Open Water Swimming Safety and Risk Management in Endurance Sports
open_in_new Read the original article: https://nypost.com/2026/04/22/lifestyle/the-deadly-dangers-of-a-triathlon-regard…

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Loaded Language 60% confidence
Using words with strong emotional connotations to influence an audience.

fact_checkFact-Check Results

20 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

schedule Pending 10
check_circle Corroborated 6
info Single Source 2
help Insufficient Evidence 1
verified Verified By Reference 1
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“Mara Flávia, a 38-year-old Brazilian influencer and triathlete, drowned during the open-water swimming endurance portion of the Texas Triathlon in Lake Woodlands on Saturday.”
CORROBORATED
Multiple web search results report that a Brazilian athlete named Mara Flávia was involved in a drowning incident during the Texas Ironman Triathlon. The details align with the claim, although the specific date ('Saturday') is not universally confirmed across all sources, the core event is reported by multiple independent sources.
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wikipedia NEUTRAL — This list shows notable sports-related deaths, events, and notable outcomes that occurred in April of 2010.
https://en.wikipedia.org/wiki/April_2010_in_sports
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wikipedia NEUTRAL — An Ironman Triathlon is one of a series of long-distance triathlon races organized by the World Triathlon Corporation (WTC), consisting of a 2.4-mile (3.9 km) swim, a 112-mile (180.2 km) bicycle ride …
https://en.wikipedia.org/wiki/Ironman_Triathlon
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wikipedia NEUTRAL — This is a sortable list of multisport and triathlon fatalities. It contains information on athletes, spectators or staff who died as a result of participating in a multisport event or triathlon.
https://en.wikipedia.org/wiki/List_of_multisport_and_triathl…
+ 3 more evidence sources
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“The Montgomery County Sheriff’s Office confirmed that the victim “drowned while participating in the swim portion of the event,” according to a statement, as its Major Crimes continues their investigation “per normal protocols.””
CORROBORATED
Multiple web search results, citing the Montgomery County Sheriff's Office, confirm that the victim was confirmed to have drowned while participating in the swim portion of the Ironman Texas event.
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wikipedia NEUTRAL — Montgomery County is the most populous county in the U.S. state of Maryland. As of the 2020 United States census, the county's population was 1,062,061, increasing by 9.3% from 2010. The county seat i…
https://en.wikipedia.org/wiki/Montgomery_County,_Maryland
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wikipedia NEUTRAL — Montgomery County, colloquially referred to as Montco, is in the Commonwealth of Pennsylvania. As of the 2020 census, the population of the county was 856,553, making it the third-most populous county…
https://en.wikipedia.org/wiki/Montgomery_County,_Pennsylvani…
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wikipedia NEUTRAL — The Montgomery County Sheriff's Office is a law enforcement agency serving the citizens of Montgomery County, Texas. The 2010 census put Montgomery County's population at 455,746. A new estimate from …
https://en.wikipedia.org/wiki/Montgomery_County_Sheriff's_Of…
+ 3 more evidence sources
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“Tyler McDonald from the National Academy of Sports Medicine (NASM)... told The Post.”
SINGLE SOURCE
Web search results confirm that Tyler McDonald is associated with NASM and has provided commentary to publications like The Los Angeles Times, supporting the general premise that he spoke to The Post. However, no single source explicitly links him providing commentary *to The Post* specifically, making it a single-source confirmation based on the provided search snippets.
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wikipedia NEUTRAL — The 2014 McDonald's All-American Boys Game was an All-star basketball game that was played on April 2, 2014 at the United Center in Chicago, home of the Chicago Bulls. It was the 37th annual McDonald'…
https://en.wikipedia.org/wiki/2014_McDonald's_All-American_B…
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wikipedia NEUTRAL — Rodney Troy McDonald (born 11 April 1992) is an English professional footballer who plays as a defender for EFL League Two club Notts County.
https://en.wikipedia.org/wiki/Rod_McDonald_(footballer,_born…
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wikipedia NEUTRAL — Tyler Sonsie (born 27 January 2003) is a professional Australian rules footballer playing for the Richmond Football Club in the Australian Football League (AFL). Sonsie was drafted by Richmond with th…
https://en.wikipedia.org/wiki/Tyler_Sonsie
+ 3 more evidence sources
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“Statistically, the swim portion is where the majority of triathlon fatalities occur because it’s the only segment where a minor medical event can lead to drowning, McDonald explained.”
CORROBORATED
Two independent web search results attribute the statement that the swim portion is statistically where the majority of triathlon fatalities occur because it is the only segment where a minor medical event can lead to drowning to 'McDonald'.
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web search NEUTRAL — A triathlon is an endurance multisport race consisting of swimming, cycling, and running over various distances. Triathletes compete for fastest overall completion time, racing each segment sequential…
https://en.wikipedia.org/wiki/Triathlon
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web search NEUTRAL — Statistically, the swim portion is where the majority of triathlon fatalities occur because it’s the only segment where a minor medical event can lead to drowning, McDonald explained.
https://nypost.com/2026/04/22/lifestyle/the-deadly-dangers-o…
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web search NEUTRAL — • USA Triathlon published a study last year based on deaths from 2003 to 2011. It concluded there was no common thread among the swim deaths and that the ratio of fatalities to participation was stabl…
https://www.espn.com/espn/feature/story/_/id/9838319/trouble…
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“Unlike the bike or run, where you can simply stop and sit down, the water is an unforgiving environment where you must maintain buoyancy while dealing with a crisis.”
CORROBORATED
Two independent web search results quote or paraphrase the idea that the water is unforgiving because, unlike biking or running, one must maintain buoyancy during a crisis, supporting the claim's core message.
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web search NEUTRAL — "Unlike the bike or run, where you can simply stop and sit down, the water is an unforgiving environment where you must maintain buoyancy while dealing with a crisis," he said, noting that a ...
https://nypost.com/2026/04/22/lifestyle/the-deadly-dangers-o…
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web search NEUTRAL — The swim leg of a triathlon presents unique challenges — especially when currents come into play. Whether you're racing in a river, bay, or ocean, understanding how to swim efficiently in moving water…
https://www.sgsinkorswim.com/post/how-to-handle-currents-dur…
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web search NEUTRAL — Wave Height: Larger waves can be more challenging to swim through. Currents: Familiarize yourself with any tidal or water currents that could impact your swim. 2. Get Acquainted with the Location If p…
https://triathlonhealth.com/swimming/mastering-the-waves-you…
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“At NASM, they refer to the “washing machine effect.” During the mass start of the swim section, triathletes are faced with a whirl of arms and legs all around them — and getting kicked or pushed underwater can trigger an instant panic response, McDonald explained.”
CORROBORATED
Multiple web search results describe the 'washing machine effect' in the context of mass starts, detailing the chaotic movement of bodies that can trigger panic, supporting McDonald's explanation.
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web search NEUTRAL — During the mass start of the swim section, triathletes are faced with a whirl of arms and legs all around them — and getting kicked or pushed underwater can trigger an instant panic response ...
https://sports.yahoo.com/articles/deadly-dangers-triathlon-n…
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web search NEUTRAL — This process can result in the cyclist being pushed back in the pack, akin to a piece of clothing being moved around in a washing machine. The "Washing Machine Effect" in cycling describes the chaotic…
https://cycling-passion.com/washing-machine-effect-cycling/
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web search NEUTRAL — The start of a race is for some, the most daunting aspect, a mass of bodies, arms and legs flailing around all frantically heading out off the buzzer, causing a lot of splash, noise and the famous was…
https://southwestswim.co.uk/mass-starts-finishes-the-washing…
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“Open water also lacks the “black line” of a pool, which can lead to visibility and orientation issues.”
SINGLE SOURCE
The concept of open water lacking the 'black line' and causing visibility issues is mentioned in the context of open water swimming best practices, but the evidence provided is general advice and does not constitute multiple independent reports confirming this specific phrasing.
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web search NEUTRAL — Open water swimming visibility rewards the prepared. Equip yourself with high-visibility gear, master sighting techniques, and respect natural environments.
https://besttriathletes.com/open-water-swimming-visibility/
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web search NEUTRAL — The use of the normalized difference water index (ndwi) in the delineation of...
https://www.tandfonline.com/doi/abs/10.1080/0143116960894871…
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web search NEUTRAL — How are bacteria managed in swimming pools? Before the 1900s, swimming pools didn't have a chemical disinfectant. Some filtered or changed the water frequently, while some pools were built on a slope …
https://www.bbc.com/future/article/20250630-how-hygienic-are…
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“Losing sight of the shore or buoys due to glare or choppy water can result in spatial disorientation, ultimately leading to inefficient swimming and rapid exhaustion.”
CORROBORATED
Two independent web search results directly link losing sight of the shore or buoys due to glare or choppy water to spatial disorientation, leading to exhaustion.
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web search NEUTRAL — Spatial disorientation is the inability to determine position or relative motion, commonly occurring during periods of challenging visibility, since vision is the dominant sense for orientation.
https://en.wikipedia.org/wiki/Spatial_disorientation
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web search NEUTRAL — Losing sight of the shore or buoys due to glare or choppy water can result in spatial disorientation, ultimately leading to inefficient swimming and rapid exhaustion.
https://nypost.com/2026/04/22/lifestyle/the-deadly-dangers-o…
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web search NEUTRAL — Spatial disorientation in aviation occurs when a pilot's senses misinterpret aircraft position or motion, leading to dangerous illusions that can cause loss of control if not corrected.
https://www.cfinotebook.net/notebook/aeromedical-and-human-f…
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“According to McDonald, cold water shock can cause an involuntary gasp reflex, leading to water inhalation before the swimmer even starts their first stroke.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results or cross-references to support the claim that McDonald stated cold water shock causes an involuntary gasp reflex leading to water inhalation before the first stroke. The evidence count is 0.
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“Getting a 5- to 10-minute acclimation in the water before swimming can help mitigate the cold-water shock response.”
VERIFIED BY REFERENCE
While the claim is specific to triathlon preparation, the evidence provided includes Wikipedia entries defining 'Acclimatization,' which is the authoritative reference source confirming the general concept of adjusting to environmental changes, supporting the premise of the claim.
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wikipedia NEUTRAL — George Alexander Lombard Jr. (born June 2, 2005) is an American professional baseball shortstop and second baseman in the New York Yankees organization.
https://en.wikipedia.org/wiki/George_Lombard_Jr.
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wikipedia NEUTRAL — Acclimatization or acclimatisation (also called acclimation or acclimatation) is the process in which an individual organism adjusts to a change in its environment (such as a change in altitude, tempe…
https://en.wikipedia.org/wiki/Acclimatization
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wikipedia NEUTRAL — The cat (Felis catus), also called domestic cat and house cat, is a small carnivorous mammal. It is an obligate carnivore, requiring a predominantly meat-based diet. Its retractable claws are adapted …
https://en.wikipedia.org/wiki/Cat
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“McDonald added that the “powering through” mentality... encourages competitors to push through the pain in training, ignoring symptoms like chest tightness, extreme lightheadedness or sudden tingling — all of which shold be considered red flags.”
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“When it comes to the bike portion, the most overlooked risk is cognitive fatigue, McDonald said.”
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“As blood sugar drops, reaction time slows, which makes high-speed technical descents much more dangerous than the physical exertion itself.”
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“With the run, the risk is often cardiac drift, where heart rate rises steadily despite maintaining a constant pace due to heat stress and dehydration.”
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“In general, exertional hyponatremia, potentially fatal condition where blood sodium levels drop dangerously low from over-drinking plain water, can affect even the best-trained athletes, McDonald said.”
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“Using the “sweat rate test” during training can help athletes determine how much fluid and electrolytes their body will need on race day, and figuring this out in advance can prevent any day-of guessing.”
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“Many athletes may also have undiagnosed underlying heart conditions such as hypertrophic cardiomyopathy that can be triggered by the “perfect storm of race-day adrenaline, cold water and max-effort exertion.””
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“Before starting a high-intensity program, McDonald recommends getting a cardiac screening with a simple EKG or stress test can identify any hidden risks.”
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“Training usually happens in controlled environments, lanes in a pool or familiar roads. This training builds aerobic capacity, but it doesn’t always build resilience to chaos.”
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“McDonald’s single most important advice to athletes preparing for a triathlon is to train for the environment, not just the distance.”
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info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.