Billy Sperlich

#Durability ≠ #Fatigability ≠ #Repeatability ≠ #Resilience.
Our JAP Viewpoint (accepted!) dives into why these distinct concepts matter in endurance research.
Grateful for the collab with Michael J Joyner + @billysperlich.bsky.social.
Let’s discuss at #ECSS2025 or during the Tour de France!

Zone2 training may not deliver the same benefits for everyone. Our new study found substantial interindividual variability in physiological responses, even among trained cyclists, indicating that personalized intensity prescriptions are necessary. @billysperlich.bsky.social
doi.org/10.1155/tsm2...

Supplementation of Creatine Monohydrate improves sprint performance but has no effect on glycolytic contribution: A Non-Randomized, Placebo-Controlled Crossover Trial in Trained Cyclists Summary: Creatine loading supplementation increases 15s-work while hinting at different mechanisms involved in its effects on individual limitations to 15s-work.

Our recent study included the effects of creatine supplementation on vlamax-testing. The results imply that some athletes may be limited by their metabolism while others could be limited by the testing setup. Read more about it here:
cdn.nutrition.org/article/S247...
@billysperlich.bsky.social

Cool, will use in next Physiology class - perfect timing!

Haha, now we know - but had my feelings on this one earlier;)

Earth breaches 1.5 °C climate limit for the first time: what does it mean? The threshold has been exceeded for only one year so far, but humanity is nearing the end of what many thought was a ‘safe zone’ as climate change worsens.

The world doesn't immediately fall apart at the 1.5 °C limit, but experts say we are "reaching the end of what we thought was a safe zone for humanity".

www.nature.com/articles/d41...

VO₂max : So drehen Sie an der magischen Zahl des Sports Kein Wert korreliert so stark mit der Lebenserwartung wie der VO₂max-Wert. Das Gute: Man kann ihn steigern und sein Sterberisiko senken. Und das ist gar nicht so schwer.

Was ist die maximale Sauerstoffaufnahme – & wie lässt sich die #VO2max steigern?
In @zeitonline.bsky.social beleuchten wir warum #VO2max ein Schlüssel zur Leistungsfähigkeit & Gesundheit ist und sprechen über 🫁, ❤️, 💪 , effektive Trainingsmethoden & praktische Tipps. Allℹ️👇
www.zeit.de/sport/2024-1...

I still advocate open-access publishing. But we urgently need better regulation. Right now, the major beneficiaries are large publishers. In Germany alone, we are spending millions of taxpayer euros merely to “flip a Word file into a PDF” - and that’s not sustainable.

🏔️ Information Overload: As the study below illustrates, the sheer volume of publications has grown so large that even specialists or expert practitioners struggle to keep up. My original goal - making knowledge more accessible -has, in some ways, backfired.

🚀 Skyrocketing Costs: What once cost <€1,000 to convert a Word file into a PDF with a DOI now easily surpasses €4,000. The process itself hasn’t changed - it’s still just flipping a Word file into a PDF- yet the publishing industry has turned it into an expensive mega-market.

👉 10–15 years ago, I was a strong proponent of open access publishing. My reasoning was straightforward: practioners outside of academia should not have essential knowledge locked behind paywalls.

However, my perspective has shifted due to two main factors:

Call to Action: Let’s control the open-access publishing madness! Read why 👇

https://journals.humankinetics.com/view/journals/jpah/aop/article-10.1123-jpah.2024-0050/article-10.1123-jpah.2024-0050.xml

Repeated Carbon Monoxide Inhalation in Sports: A New Frontier or a Dangerous Gamble? Click on the article title to read more.

Carbon monoxide inhalation for endurance gains? Minor benefits, but huge risks—hypoxia, organ damage, even death—and unknown long-term effects.
A global team urges a ban to safeguard athletes & fairness.
Read more 👇
onlinelibrary.wiley.com/doi/10.1111/...

@hajoseppelt.bsky.social #wada #antidoping

https://physoc.onlinelibrary.wiley.com/doi/full/10.1113/JP287691

🆕In @JPhysiol we challenge strict standardization in exercise physiology and promote a flexible, blended approach. Combining classical methods with modern tech like #AI and #wearables improves threshold assessments while balancing accuracy & practicality....

Honestly, this is getting crazy.
#OpenAccess expands knowledge sharing, but the rising publication fees pose a significant barrier for many researchers, especially those without institutional funding. We must find a balance between access and affordability....

stop?

https://journals.physiology.org/doi/full/10.1152/japplphysiol.00462.2024

@PeterDuking and I jumped into the intriguing debate about
"Technological advances in elite sport: If we draw a line, where would we stop?"
sparked by @BorjaMunizP, Yannis Pitsiladis & @DrMJoyner in @japplphysiol

Where would you...

stop?

https://journals.physiology.org/doi/full/10.1152/japplphysiol.00462.2024

@PeterDuking and I jumped into the intriguing debate about "Technological advances in elite sport: If we draw a line, where would we stop?" sparked by @BorjaMunizP, Yannis Pitsiladis & @DrMJoyner in @japplphysiol

Where would you...

3/3 We suggest implementing additional running sessions and modifying small-sided games to better balance workloads and improve non-starters' physical preparedness.
🙏 @philipp__kunz @PeterDuking @Uni_WUE

2/3 Our data showed that non-starters consistently experienced lower workloads, particularly in high-intensity activities during matches and compensation training. #football

A comparative analysis of weekly internal and external wo... By implementing a running-based regimen on matchday and M...

1/3 🆕 study in @PLOS
We aimed to compare the weekly training and match loads between starting and non-starting professional #soccer players and to identify variations across training modalities.
All ℹ️👇https://pubmed.ncbi.nlm.nih.gov/39197027/

Madness or progress? The dilemma of standardizing exercis... Madness or progress? The dilemma of standardizing exercis...

🆕 in @JPhysiol
We discuss the challenges of standardizing #exercise physiology thresholds, emphasizing the need for flexible, problem-specific approaches that consider diverse populations and practitioner expertise. More info 👇 https://pubmed.ncbi.nlm.nih.gov/39190457/

2/2 This typology limits the validity and comparability of research. We emphasize the need for a nuanced classification to improve the quality of biomolecular studies, particularly those investigating gene-phenotype relationships in athletes.

Frontiers | A critical examination of sport discipline ty... Exercise scientists (especially in the field of biomolecu...

https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2024.1389844/full

1/2 🆕collaboration with Magdalena Schellenberg & @MauriceZ36414 from @Unimaas, @unibt, @Uni_WUE highlights flaws in current sport typology systems, arguing that labeling athletes as "endurance" or "strength" oversimplifies their complex characteristics....

3⃣CGM didn't meet clinical accuracy for diabetic care
4⃣ Read & judge yourself whether CGM could be used by non-diabetic athletes tracking blood glucose.

‼️ Potential benefits of CGM in #sportsnutrition and physiology need more validation and rational justification.

1⃣ High individual variability of CGM vs BGM post-breakfast, pre-exercise, exercise, post-exercise
2⃣Post-Exercise Discrepancies: Largest differences observed post-exercise.
#CGM #bloodglucose #diabetes

Accuracy of a continuous glucose monitoring system applie... Purpose The aim was to assess the accuracy of a continuou...

🆕study about continuous blood glucose monitoring during intense leg-squat sessions with low & high CHO together with @manuelmatzka & @nortenblad https://link.springer.com/article/10.1007/s00421-024-05557-5 #StrengthTraining
Key findings👇