We've just updated the mNIRS.org website. The go to page for all those interested in scientific activities/conferences/workshops in muscle Near Infrared Spectroscopy (mNIRS) Take a look at www.mnirs.org Join our community by signing up to the mailing list for infrequent but interesting posts!

The main challenge is: Simply telling the athlete "don't buy it" is not enough. You have to explain that the marketing is deceiving and why it doesn't add benefit to their training. And with the blink of an eye half an hour of my time is gone 🤷‍♂️

Philip Skotzke@philipskotzke.bsky.social · 3w ago

An athlete sent me the link to this company. Both the name and the landing page suggest it measures lactate. You have to click a few links to learn it's NIRS! I don't know anything about the device, but the marketing is maximally deceiving. I wouldn't trust a company with this strategy! ❌

An athlete sent me the link to this company. Both the name and the landing page suggest it measures lactate. You have to click a few links to learn it's NIRS! I don't know anything about the device, but the marketing is maximally deceiving. I wouldn't trust a company with this strategy! ❌

Now the repository has a DOI: doi.org/10.17605/OSF...

Philip Skotzke@philipskotzke.bsky.social · last mo.

New study out on muscle oxygen saturation (SmO₂) breakpoints using NIRS 🎉 First authored by @igfjarillo.bsky.social - I contributed via the statistical analyses. While we present the findings elsewhere, here I focus on what’s new about our approach and why it matters ⬇️🧵 1/8

New study out on muscle oxygen saturation (SmO₂) breakpoints using NIRS 🎉 First authored by @igfjarillo.bsky.social - I contributed via the statistical analyses. While we present the findings elsewhere, here I focus on what’s new about our approach and why it matters ⬇️🧵 1/8

Muscle oxidative capacity analysis with #mnirs is monoexponential by consensus. But are there secondary drift kinetics hiding in the data and biasing results?🤔 No idea, but could 'slow-component' drift be related to hyperaemia + metabolic rate adjustments as seen here? Thoughts? #rstats

New study out on muscle oxygen saturation (SmO₂) breakpoints using NIRS 🎉 First authored by @igfjarillo.bsky.social - I contributed via the statistical analyses. While we present the findings elsewhere, here I focus on what’s new about our approach and why it matters ⬇️🧵 1/8

To all academics

Another call for input! 📢 CLINICIANS, COACHES, and ATHLETES managing recovery from surgery for flow limitations in the iliac artery FLIA / endofibrosis We'd love to hear your experiences to help improve care for athletes. Please contact email below 👇 #cycling #sportsmedicine #sportmedicine

My old institutional email is dead. If you read one of my papers and tried contacting me at the corresponding author address, it won't reach me. My master's ended last October. Now my email account has been deleted. If you want to reach me, there are still plenty of options (e.g. this platform)

HIIT vs. Zone 2: The never ending debate that needs to end as it's just strawman against strawman A new review is making the rounds. I break it all down and show why we're basically screaming at clouds. The mistake and what actually works: stevemagness.substack.com/p/stop-argui...

Stop Arguing About Zone 2

The Argument of Intensity or Volume is Dumb. Let's Stop

stevemagness.substack.com

New preprint: There is only one correct analysis. osf.io/preprints/ps... with @sajedehra.bsky.social and @mntunc.bsky.social We take a critical look at recent proposals for multiverse or many analyst procedures, and strongly argue that epistemic uncertainty should be reduced, not “embraced”. >

We launched our beta version 0.0.1 of Metacheck today! After our second year of work on the tool, we now have validated modules, hugely expanded functionality, optional (or local) LLM use, checks inside code files, and much more! Try it out in R now: www.scienceverse.org/metacheck/

New paper in EJAP: In trained cyclists, vLaₚₑₐₖ had stronger associations with metabolic thresholds than sprint power — suggesting that the glycolytic signature of the sprint matters for endurance profiling. @billysperlich.bsky.social @peter-leo.bsky.social https://doi.org/10.1007/s00421-026-06270-1

Maximal glycolytic flux modulates metabolic thresholds independent of maximal oxygen uptake - European Journal of Applied Physiology

Purpose This study examined how maximal glycolytic flux, indexed by the peak lactate accumulation rate (vLapeak) from a 15-s sprint, relates to lactate- and gas-exchange derived endurance thresholds a...

link.springer.com

Generally, I am an AI sceptic. But I'm totally impressed by Claude Code. Within a few days I vibe-coded my own fully functional app to control the Lode Cycling Ergometer. 😮 Including a Golden Cheetah like programming language to build step and ramps in hyperbolic and linear mode!

Generally, I am an AI sceptic. But I'm totally impressed by Claude Code. Within a few days I vibe-coded my own fully functional app to control the Lode Cycling Ergometer. 😮 Including a Golden Cheetah like programming language to build step and ramps in hyperbolic and linear mode!

I made a #Shiny app about post hoc power and effect-size uncertainty. If you accept an observed effect, you also need to accept its uncertainty. The app shows how power wobbles when you consider the CI, not just the estimate. Embrace the #wobble #samplesize open.substack.com/pub/mzlotean...

Power is wobbly, and 80% might be more like 5%

A Shiny app for showing that power analysis based on an empirical effect-size estimate is only as stable as the estimate itself.

open.substack.com

Turns out, AI is not useful at all for this. I gave Claude a rather neutral explanation of the problem. The first response was opposite to what I would've done. By simply asking a few questions, Claude switched positions and now recommends exactly what I would've done.

Philip Skotzke@philipskotzke.bsky.social · 4mo ago

Dear stats people, I'm looking for textbooks or other resources on test design and analysis to establish validity & reliability. Any recommendations & repost appreciated. PS: we have to respond to a reviewer and I want to make sure we're doing the right thing. #rstats #stats #science #AcademicSky

Dear stats people, I'm looking for textbooks or other resources on test design and analysis to establish validity & reliability. Any recommendations & repost appreciated. PS: we have to respond to a reviewer and I want to make sure we're doing the right thing. #rstats #stats #science #AcademicSky

Garmin & Whoop are betting on muscle oxygen monitoring. Before you trust a muscle battery score: SmO₂ varies ~6% day to day. That's more noise than you'd want. Check out the first post of my new blog series "Science Translated"👇

Science Translated: How reliable is your muscle oxygen saturation monitor? – PS²

Measuring muscle oxygen saturation is coming to Garmin and Whoop. Before you trust them, here’s what the reliability data says.

perfsci2.com

Garmin & Whoop are betting on muscle oxygen monitoring. Before you trust a muscle battery score: SmO₂ varies ~6% day to day. That's more noise than you'd want. Check out the first post of my new blog series "Science Translated"👇

Science Translated: How reliable is your muscle oxygen saturation monitor? – PS²

Measuring muscle oxygen saturation is coming to Garmin and Whoop. Before you trust them, here’s what the reliability data says.

perfsci2.com

Podcasts with Olav Bu can be a mixed bag. However, here he provides a lot of detail and insight into the lab testing of Kristian Blummenfelt and other athletes. Worth a listen!

Olav - Kristian’s VO2Max Testing 

Spotify video

open.spotify.com

🚨New paper in Sports Medicine “35 Years of Joyner’s Endurance Performance Model” Led by @loismougin.bsky.social (co-first author) 📄Open access 🔗https://link.springer.com/article/10.1007/s40279-026-02439-y 1/13

@mnirs.bsky.social Abstract submissions now open for mNIRS 2026 in Pavia (Sept 17-19). Abstract deadline June 15 www.mnirs2026.org

mNIRS 2026

mnirs2026.org

Our NEW study in @BMJ_Open is an audit of 𝐡𝐞𝐚𝐥𝐭𝐡 𝐦𝐢𝐬𝐢𝐧𝐟𝐨𝐫𝐦𝐚𝐭𝐢𝐨𝐧 spread by popular AI chatbots. Learn more🧵1/7 Thx to amazing team: @CaulfieldTim @srmarcon at @UAlbertaLaw & @Jeukendrup @marco_zenone 🔗https://bmjopen.bmj.com/content/16/4/e112695 #health #misinformation #AI

“Scientific training” is everywhere in endurance sports. But what does it actually mean? In my first blog post, I argue that training cannot be scientific and the term often is used for marketing. Curious what you think: 🔗 perfsci2.com/posts/scient...

Scientific training: Concept, Misconception or Marketing? – PS²

Some coaches and athletes claim to follow “scientific training”. What does that actually mean and does it really exist? A critical perspective.

perfsci2.com

“Scientific training” is everywhere in endurance sports. But what does it actually mean? In my first blog post, I argue that training cannot be scientific and the term often is used for marketing. Curious what you think: 🔗 perfsci2.com/posts/scient...

Scientific training: Concept, Misconception or Marketing? – PS²

Some coaches and athletes claim to follow “scientific training”. What does that actually mean and does it really exist? A critical perspective.

perfsci2.com

Waking up to see my normally rather quiet BlueSky feed to be flooded with posts about the just published SCORE project. I like it Time to start reading 🤓

I just launched my own website 🌐 🔗 perfsci2.com On Performance Science² (PS²) I combine endurance coaching, sport science, and writing about training and research. I’ll use the blog to share insights from both coaching and science. 📝

I just launched my own website 🌐 🔗 perfsci2.com On Performance Science² (PS²) I combine endurance coaching, sport science, and writing about training and research. I’ll use the blog to share insights from both coaching and science. 📝