A quick scan of what happened.

• HYROX times continue to fall as records are pushed to the limit in Phoenix
Hyrox times continue to get faster as Joanna Wietrzyk set a new professional women’s record with a time of 56:03, while on the men’s side Alexander Rončević missed the world record by just one second with a time of 53:16. Additionally, Lauren Weeks and Vivian Tafuto set a new women’s pro doubles world record at 53:11.

• Patrick Vellner undergoes heart ablation procedure for atrial flutter
CrossFit Games athlete Patrick Vellner shared that he recently underwent a cardiac ablation to treat atrial flutter. The issue was identified early and addressed proactively, underscoring the importance of regular health screening even among highly trained, elite athletes.

• Peter Attia faces criticism following release of Epstein-related documents
Leading longevity physician Peter Attia is facing scrutiny following his inclusion in the latest release of documents related to Jeffrey Epstein. Attia is referenced extensively in the materials and has publicly acknowledged engaging in what he described as “crude and tasteless” email exchanges. While Attia has denied any wrongdoing, the disclosures have sparked debate around judgment, association, and his standing as a leading voice in the longevity and health space.

• Ironman officially extends professional bike draft distance to 20 meters
Ironman has officially changed the bike draft zone for professional athletes from 12 meters to 20 meters. The adjustment is expected to reward stronger cyclists and front-of-pack athletes, reduce pack dynamics, and place greater emphasis on individual power and pacing execution.

A recent study has sparked debate by challenging the long-standing belief that high carbohydrate intake during endurance exercise is necessary to maintain performance. The research, published in Endocrine Reviews (link here), examined performance outcomes in athletes consuming lower amounts of carbohydrates during prolonged exercise and found that, in certain contexts, reduced carbohydrate intake did not meaningfully impair performance compared to higher-carb fueling strategies.

The authors suggest that well-trained athletes may be capable of relying more heavily on fat oxidation than previously assumed, particularly during moderate-intensity efforts or when metabolically adapted through consistent training. The paper also highlights potential downsides of chronic high-carbohydrate fueling strategies, including gastrointestinal distress, reduced metabolic flexibility, and possible long-term metabolic health concerns when aggressive fueling is applied broadly rather than selectively.

That said, the findings are not definitive. The review does not eliminate carbohydrates as a performance tool, nor does it fully replicate real-world race conditions such as repeated high-intensity surges, heat stress, or very long-duration events. Individual variability was also emphasized — some athletes appear to maintain performance with lower carbohydrate intake, while others may experience clear performance decrements.

Fueling for training is highly individualized, and there is no single carbohydrate strategy that works for everyone. If your training is relatively casual and rarely extends beyond an hour or two, you can likely perform well without aggressive carbohydrate intake. However, when training for long-duration events like ultramarathons or an Ironman, the ability to tolerate and effectively use high carbohydrate intake can become a major performance advantage. The key is matching your fueling strategy to the demands of your training — not following one universal rule.

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