Team Leader Sports & Exercise Nutrition (@HANsportnutr) at HAN University of Applied Sciences (@HANnl) | Bridging research and practice | 🇳🇱
Groesbeek, Nederland
Joined August 2020
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Jan-Willem van Dijk retweeted
1/15
New creatine paper in JISSN claims 10 g/d helps middle-aged and older adults keep muscle, strength and cognitive function, with or without exercise. I read all 33 pages. The data don't support those conclusions. A 🧵
This new creatine study is insane.
People who never trained took 10g of creatine a day and gained more lean tissue (2.43 lbs) than people who were lifting 3x a week with no creatine (0.31 lbs).
Here's the breakdown: (1/18)
Readers added context they thought people might want to know
The lean tissue gains in the no-exercise creatine group were measured by DXA body scans which creatine affects by increasing intracellular water that registers as lean mass. The decision to exercise or not was self-selected by participants not randomized.
pmc.ncbi.nlm.nih.gov/articles/PMC13…
medicalnewstoday.com/articles/creat…
Jan-Willem van Dijk retweeted
It was a pleasure to contribute a couple of chapters to this handbook with fantastic international collaborators @CameronMGee 🇨🇦 and @JanWvanDijk 🇳🇱
Thanks to @KatyGriggs and Joëlle Flück for the invitation😊
@UBSportExR @unibirmingham @ICORD_SCI 2/2
Jan-Willem van Dijk retweeted
Great to receive a copy of this textbook in the post tinyurl.com/4vw25nkw @routledgebooks
Thank you to the Editors for their hard work pulling together this comprehensive resource, which covers current and emerging topics in disability sport science 1/2
Jan-Willem van Dijk retweeted
Is human energy expenditure constrained?
I recently debated Herman Pontzer on this topic at RACMEM. My slides can be viewed here: linkedin.com/posts/javier-go…
Jan-Willem van Dijk retweeted
My NYT editor: Wanna write something about sports/workout supplements?
Me: Basically nothing works, IMO, other than a VERY short list the IOC drew up.
Her: Okay, write that.
So (after calling a few people) I did:
nytimes.com/2025/09/15/well/…
Jan-Willem van Dijk retweeted
In our recent meta-analysis with trained athletes, did the athletes who improved their VO2max more also improve their endurance performance more?🤔
No! 😮
In this dataset, +1% change in VO2max was associated with only +0.04% change in TT performance. But why? 1/15🧵
ALT A one-stage linear mixed effects model meta-analysis based on our individual participant dataset (but not peer reviewed) showing individual athlete percentage change scores for both VO2max (maximal oxygen uptake) and time-trial (TT) performance, for 236 trained athletes in 6 studies. The relationship (correlation) between change in VO2max and change in performance was not significant and not meaningful. The overall change in VO2max only explained around 25% of the total variance in the change in endurance performance, across athletes.
Jan-Willem van Dijk retweeted
INDUSTRY BIAS IN NUTRITION RESEARCH?
One type of bias is publication bias (aka desk draw bias)
Not publishing some studies due to the direction or strength of their findings
eg. if findings do not conform to a hypothesis
Is there evidence of this bias in nutrition research?
🚴♀️🏆 Exciting news! Our article, "Jumping Exercise Combined With Collagen Supplementation Preserves Bone Mineral Density in Elite Cyclists", is nominated for Publication of the Year by IJSNEM! 🎉
🧵 What makes this research unique?
journals.humankinetics.com/v…
6/ Team effort: Led by @luukhil , with contributions from Nick van Schijndel, @VeraWeijer, @decroixlieselot, Judith Bons & Luc van Loon. Plus, key support from the cycling community! 👏
We’re proud of this nomination. If you like our work, you can help us win by voting for our research here:
🔗 docs.google.com/forms/d/e/1F…
Thank you for supporting research that bridges science & practice! 🙌
Lessons Learned from Continuous Glucose Monitoring (CGM) in Para Cyclists
1/ CGM is increasingly explored as a tool to optimize dietary counseling in athletes. What can we learn from its application in Para athletes? Our new study investigated this: onlinelibrary.wiley.com/doi/… 🧵
13/ 📝 Yes, this is a small study with limitations. Still, we believe the findings add valuable insights into the potential uses and limitations of CGM in (Para) athletes. Want to explore more? Link to full paper is in first message, it is available #openaccess in @EurJSportSci.
14/end 🌟 Many thanks to the athletes who participated in this study and to the research team led by @veraweijer. This work was made possible with funding from @RegieorgaanSIA and @Eat2Move.
@Jeukendrup @m3researchgroup @Robvanderwerf @HANsportnutr