Christian Magelssen

Exploratory research in sport and exercise science: Perceptions, challenges, and recommendations Quantitative exploratory research implies a flexible examination of a dataset with the purpose of finding patterns, associations, and interactions between variables to help formulate a hypothesis, ...

The latest from myself, @crist14n.bsky.social, Grant Abt, and @lakens.bsky.social on exploratory research in sport/exercise science.
doi.org/10.1080/0264...
We outline the differences between exploratory & confirmatory studies and best practice for conducting/reporting an exploratory study.

The trend of sport and exercise scientists, a field of largely statistically illiterate researchers (not all, but most), eschewing hypothesis testing (mostly NHST) for estimation approaches (i.e., confidence intervals) has seemingly licenced most to just interpret the sign of their effect estimate.

Here's a draft of the second chapter I have been writing on research activities including theory building, testing, and applied/technological research:

bit.ly/research_act...

A 🧵 on why I am sharing this now...

I have never taken LA or Calculus, which I regret. I hated math until a took a course in computational neuroscience and learned the importance of math. And my research field is becoming more math oriented. Therefore, if I stay in academia, I will take them next semester.

Thanks for tips 👍

🙏 - What is your favorite book on the topic?

What do you think of linear algebra and matrix analysis…?

How can we train skills effectively? 🧠

That was the topic when I joined Olympiatoppen’s podcast yesterday, where I discussed this with Caper Ruud’s technical coach, Øivind Sørvald. #tennis #sport #motorlearning #skillearning

We grumbled while presiding over a rotten system. Now the grumbling has been weaponised to ruin the system completely. I think this goes beyond science.

What do you have in mind, specifically? Is it that it only illustrates the subject-specific models?

30. principles of sensorimotor control

up to now, we've mostly talked about how brains construct internal representations of the world. now let's talk about how we use those representations to act on the world, through motor output.

movement feels natural to us, but our brains are doing a lot.

We have a great program lined up for NCM 2025 in Panama! Poster submissions are open until Feb 17th. #NCMPan25

Reposting this for the weekday crowd

A new YouTube video on one of the new functions in my gratia 📦 for #RStats

Are Existing Monocular Computer Vision-Based 3D Motion Capture Approaches Ready for Deployment? A Methodological Study on the Example of Alpine Skiing In this study, we compared a monocular computer vision (MCV)-based approach with the golden standard for collecting kinematic data on ski tracks (i.e., video-based stereophotogrammetry) and assessed i...

Awesome! I hope I get there… I started looking into pose estimation in 2019, but gave up that direction. But it seems that much have happened since that time 😅

www.mdpi.com/1424-8220/19...

Thank you, Konrad! I will have a look. Are there other good resources that might be helpful in getting started?

I tag some people that I hope can help: @paulgribble.bsky.social @kordinglab.bsky.social @adrianhaith.bsky.social @jamessteeleii.bsky.social

Here's my thesis:
hdl.handle.net/11250/3170329

And here's a paper together with my supervisor Romy Frömer:
www.biorxiv.org/content/10.1...

(5/5)

The second thing I want to improve is (computational) modeling athletes’ learning. Are there any great research groups to follow or key articles I should read? I’m grateful for any tips you can share. Thank you! (4/5)

To achieve this, I’m considering using pose estimation to capture skiers’ movements during learning experiments. I’m new to this and wonder: what tools would you recommend? OpenSim, DeepLabCut, or something else? And how would you suggest learning it? (3/5)

I want to study how different types of instructions and feedback influence habits—both productive and limiting—for learning expertise. (2/5)

Hello! My name is Christian Magelssen, and I hold a PhD focused on (motor) skill learning in elite alpine skiers. I’m looking to take the next step and would love to get some advice from people I admire and think might have answers to my questions. (1/5)

How do people shoot pucks at targets for money?

In this new preprint based on work led by @fatatai.bsky.social together with @c-rothkopf.bsky.social, we show that they take an internal physics model and their individual sensorimotor variability into account.

I’ve built a simple website for anyone interested in following my projects! 🎉

cmagelssen.github.io/portfolio/

I’m planning to create tutorials on skill learning and/or stats with React & D3.js in the future.

I’d love to hear your thoughts, discuss ideas, or get feedback. Thanks! 🙏

Unfortunately, this is also the trend in sports science: ‘validating’ technology that few clubs can afford and that shouldn’t be high on anyone’s priority list anyway 🙄

I have a preprint of a study I’m not proud of and honestly don’t have the energy to submit to a journal. Still, I hope it reaches those considering using the same technology to study alpine skiin. In this case, the technology overshadowed the research question—and that’s always a recipe for failure.

It's tool and website maintenance day! I am aiming to:

1. finally get faux resubmitted to CRAN
2. update the @psyteachr.bsky.social site
3. automate a few things for recognition.ukrn-openresearch.ac.uk
4. update my intro to #rstats packages workshop psyteachr.github.io/intro-r-pkgs/

Typo but I think you got it! 😅

And Shadmehr as well as your name as well, @kordinglab.bsky.social

Overleaf is great! I don’t think cell journals accept latex

Disputas: Undervisnings- og bevegelsesstrategier for å lære og forbedre ferdigheter hos alpinister - Norges idrettshøgskole Utøvere som lærer valg av strategier gjennom prøving og feiling, lærer og presterer sammenlignet med tradisjonell instruksjonsbasert læring, viser forskning gjort på 98 alpinister.

I will defend my PhD on December 19th! The title of my thesis is "Improving teaching and movement strategies for skill learning and performance in skilled and elite alpine ski racers" The defence is open to everyone and can be followed live. More info here: www.nih.no/om/aktuelt/h...

🥰

Am I wrong?

#motorlearning #decisionmaking #motorcontrol #neuroscience