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Sjoerd Bruijn

@smbruijn.bsky.social
240 followers 290 following 76 posts
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Sjoerd Bruijn @smbruijn.bsky.social · 15/05/2026
And another new preprint: Aging impairs control of center of mass during repeated visual perturbations in walking www.biorxiv.org/content/10.6... With @yaqili0130.bsky.social @jvandieen.bsky.social and Eugenie Lambrecht As always: feedback welcome!
biorxiv.org
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Sjoerd Bruijn @smbruijn.bsky.social · 08/05/2026
This one has been 5 years in the making; just because.. well, stuff happens. Anyway, enjoy our newest preprint; The limits of using angular momentum to control center of mass position sportrxiv.org/index.php/se... with @maartenafschrift.bsky.social Koen Lemaire and @jvandieen.bsky.social
sportrxiv.org
The limits of using angular momentum to control center of mass position | SportRxiv
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Matthieu Boisgontier @matthieuboisgontier.com · 30/04/2026
It’s time to submit your abstracts for this great conference www.posture.sk #posture @cybal.bsky.social @smbruijn.bsky.social @tobyellmers.bsky.social @elmarkal.bsky.social @eleagle.bsky.social @melvynroerdink.bsky.social @deepak-ravi.bsky.social @antoinelangeard.bsky.social @phterrier.bsky.social
@mark
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Sjoerd Bruijn @smbruijn.bsky.social · 19/01/2026
#biomechsky question. Is there a way to plot opensim models/kinematics/ whatever native from python? That is, without opening an opensim window, can I plot a vsiualisation of my results of the sim? If not, why not? And would you be interested in it?
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Sjoerd Bruijn @smbruijn.bsky.social · 09/12/2025
And another preprint. This time with Simone Berkelmans and @maartenafschrift.bsky.social Foot placement is not controlled based on angular momentum. Bold title; hope it stands up to your scrutiny! As always; feedback and comments more than welcome! www.biorxiv.org/content/10.6...
biorxiv.org
Foot placement is not controlled based on angular momentum
This study examined how mediolateral foot placement is controlled following mechanical perturbations that affected either whole-body linear or angular momentum. Predictive foot placement models based ...
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Sjoerd Bruijn @smbruijn.bsky.social · 28/11/2025
Just realised @gengyang.bsky.social is on Bsky as well…. Give her a follow if you like this work!
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Sjoerd Bruijn @smbruijn.bsky.social · 28/11/2025
New preprint; Shared feedback control principles across standing and walking. With Yang Geng and @jvandieen.bsky.social. Feedback welcome! www.biorxiv.org/content/10.1...
biorxiv.org
Shared feedback control principles across standing and walking
Feedback control is required to maintain stability in both walking and standing, whereas the control parameters may differ due to the inherently different characteristics of these tasks. How feedback ...
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Sjoerd Bruijn @smbruijn.bsky.social · 11/09/2025
You can still register for the International Motor Impairments Conference; motorimpairment.org. The program looks exciting so what are you waiting for?
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Sjoerd Bruijn @smbruijn.bsky.social · 08/07/2025
Any people going to #isb2025 on here? Thinking of going bouldering there one evening. Want to join? Let me know!
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ISPGR @ispgr.bsky.social · 03/07/2025
See you in Japan! #ISPGR2027
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Sjoerd Bruijn @smbruijn.bsky.social · 02/07/2025
If this were a normal @ispgr.bsky.social and I would be handling the official account as usual, this is the moment I would sign off. Not this year. Keynote tomorrow at 8:30. Party in full swing. Loving it! See you all tomorrow! #ispgr2025
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ISPGR @ispgr.bsky.social · 01/07/2025
Yes or no debates finally back. Who takes the prize? #ISPGR2025
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Sjoerd Bruijn @smbruijn.bsky.social · 01/07/2025
Have you met any of our JPND funded STEPuP project members yet? We cannot be missed! Ask us about this amazing project @ispgr.bsky.social #ispgr2025
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Deepak Ravi @deepak-ravi.bsky.social · 29/06/2025
The lead author will present this study at #ISPGR2025! 🧠 Session O.01 – Coordination of Posture & Gait in PD 📅 30th June | 🕒 15:30–17:30 📍 Auditorium 2
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Sjoerd Bruijn @smbruijn.bsky.social · 29/06/2025
Meeting friends old and new on #ispgr2025. Hope to connect online as well! @ispgr.bsky.social
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Sjoerd Bruijn @smbruijn.bsky.social · 29/06/2025
And another preprint, this one from our STEPUP consortium: "Foot placement coordination is impaired in people with Parkinson’s Disease". Too many authors to tag! www.biorxiv.org/content/10.1... feedback welcome!
biorxiv.org
Foot placement coordination is impaired in people with Parkinson’s Disease
Background Gait instability is a common and disabling symptom of Parkinson’s disease (PD), contributing to frequent falls and reduced quality of life. While clinical balance tests and spatiotemporal g...
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Sjoerd Bruijn @smbruijn.bsky.social · 29/06/2025
New preprint by Yiyuan Li, with @jvandieen.bsky.social and others; The contribution of vestibular and proprioceptive signals to trunk stabilization varies between postural tasks and between walking speeds. www.biorxiv.org/content/10.1... feedback welcome!
biorxiv.org
The contribution of vestibular and proprioceptive signals to trunk stabilization varies between postural tasks and between walking speeds
Stabilizing the upright posture of the trunk relies on vestibular and proprioceptive afference. Previous studies found that the feedback responses to sensory afference vary between postures and tasks....
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Sjoerd Bruijn @smbruijn.bsky.social · 29/06/2025
On my way to Maastricht for @ispgr.bsky.social! See you there!
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Sjoerd Bruijn @smbruijn.bsky.social · 20/06/2025
Bump. Who will join for bouldering? probably tuesday after conference.
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Sjoerd Bruijn @smbruijn.bsky.social · 08/05/2025
New preprint with Yaqi Li, Eugenie Lambrecht and @jvandieen.bsky.social; www.biorxiv.org/cgi/content/... Suggestions and feedback welcome! #BiomechSky
biorxiv.org
The Impact of Visual Perturbations on Balance Control during Walking
Visual perturbations may lead to a perception of self-motion and affect balance control. We studied effects of different visual perturbations in 16 healthy young participants walking on a treadmill, b...
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Sjoerd Bruijn @smbruijn.bsky.social · 24/04/2025
Vote for @leeuwenmoira.bsky.social and Mohammadreza! www.formdesk.com/vuamsterdam/...
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Sjoerd Bruijn @smbruijn.bsky.social · 19/04/2025
Want to do this. Shall I do this?
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Sjoerd Bruijn @smbruijn.bsky.social · 18/04/2025
Also, (ssssht, tell this to your students!) I've heard that despite the deadline, the registration for the mentorship programme is still open..... What are you(re students) waiting for? ispgr.org/mentor-progr... #biomechsky
ispgr.org
Mentor Program - ISPGR
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Sjoerd Bruijn @smbruijn.bsky.social · 18/04/2025
So who on here is going to ISPGR this year? Anyone up for a night of bouldering? There's a great gym in Maastricht... #Biomechsky
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Sjoerd Bruijn @smbruijn.bsky.social · 14/03/2025
That time of the year again…. Waiting for an old geezer on the other side of the pond to light a cigarette, so the refreshing of my feed can begin… #bm100
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Sjoerd Bruijn @smbruijn.bsky.social · 04/03/2025
Ok, sky help me out here. If doing inverse kinematics using IMUs, is really only the orientation of the sensors used? It would seem that if you have a reasonable estimate of pos of sensor on segment, given kinematic chain, you would also know acc, and hence, could use that info for better fit. 1/2
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Sjoerd Bruijn @smbruijn.bsky.social · 13/02/2025
Come to Amsterdam this fall (Oct 8-10) for the International Motor Impairment Conference!
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Sjoerd Bruijn @smbruijn.bsky.social · 10/02/2025
Have free living lower back IMU data, and want to identify gait? Check out new preprint by Yuge Zhang; "An open-source, externally validated neural network algorithm to recognize daily-life gait of older adults based on a lower-back sensor". www.biorxiv.org/content/10.1.... Feedback welcome!
biorxiv.org
An open-source, externally validated neural network algorithm to recognize daily-life gait of older adults based on the lower-back sensor
Background Accurate gait recognition from daily physical activities is a critical first step for further fall risk assessment and rehabilitation monitoring based on inertial sensors. However, most ope...
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Jaap van Dieen @jvandieen.bsky.social · 03/02/2025
Attention Motor Impairment Researchers and Clinicians! Registration and abstract submission for the International Motor Impairment Conference 2025 are now open. Visit our website and find our confirmed speakers, Abstract Submission & Early bird registration: motorimpairment.org
motorimpairment.org
International Motor Impairment Conference – Next conference: 8-10 October 2025, Amsterdam
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Sjoerd Bruijn @smbruijn.bsky.social · 02/02/2025
Out of office! :-)
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Sjoerd Bruijn @smbruijn.bsky.social · 31/01/2025
Preprint alert! With amazing Msc student Raven (looking for a job!) and @jendavies.bsky.social, we studied involvement of the motor cortex in stabilizing gait with TMS. www.biorxiv.org/content/10.1... Feedback welcome! This was a really fun collab, made possible thanks to @royalsociety.org grant!
biorxiv.org
| bioRxiv
bioRxiv - the preprint server for biology, operated by Cold Spring Harbor Laboratory, a research and educational institution
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Felipe Carpes @felipecarpes.bsky.social · 27/01/2025
Important Announcement! The deadline for abstract submissions to the ISB Congress 2025 has been extended to February 14th, 2025! Spread the word—and let’s get those abstracts submitted! www.isb2025.com
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Jaap van Dieen @jvandieen.bsky.social · 14/01/2025
We have just published this pre-print. doi: doi.org/10.1101/2025.... We show that linear and angular momentum are both controlled during bipedal walking. This study resulted from discussions we had on the use of foot placement to stabilise gait. Comments and suggestions are welcome.
doi.org
Simultaneous stabilizing feedback control of linear and angular momentum in human walking
Stabilizing bipedal gait is mechanically challenging. Previous studies have used the assumption that the linear momentum of the body center of mass (CoM) is controlled to analyze how gait is stabilize...
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Luca Modenese @modenaxe.bsky.social · 19/12/2024
Finishing the year in style with a job alert! 📢 I am seeking for a talented postdoctoral researcher/researcher to join my Neuromechanics group at UNSW. This is a 2-year full-time position focusing on predictive musculoskeletal simulations (1/3) 👇
external-careers.jobs.unsw.edu.au
Research Associate/Senior Research Associate
Conduct research in the field of predictive musculoskeletal simulations, independently and as part of a team.
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Nadia Dominici @nad-dom.bsky.social · 18/12/2024
We are looking for a postdoctoral researcher to join the META MUSEUM project: Emotion and Biomarkers. This interdisciplinary project focuses on understanding emotion-induced bodily and neurophysiological biomarkers through experimental interventions. werkenbij.vu.nl/vacatures/po...
werkenbij.vu.nl
Vacature — post-doc on META MUSEUM: Emotion and Biomarkers
Are you fascinated by the intersection of emotions, neuroscience, and human experiences? Join our innovative research team as a postdoc and contribute to cutting-edge investigations into emotion-induc...
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Sjoerd Bruijn @smbruijn.bsky.social · 21/12/2024
Just in time for your Christmas reading list: new preprint with Yang Geng and @jvandieen.bsky.social: “ Upright stance is controlled close to critical stability across different postures” (www.biorxiv.org/content/10.1...) feedback welcome!
biorxiv.org
Upright stance is controlled close to critical stability across different postures
Feedback stabilization of upright standing postures should be reflected by a time-lagged relationship between the ground reaction force (GRF) and the center of mass (COM) state. In this study, we prop...
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Communications in Kinesiology (CiK) @cik.bsky.social · 07/12/2024
Diamond open access, free for authors and readers, that’s us.
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Peter Fino @pcfino.bsky.social · 02/12/2024
We're hiring a postdoc to work on several projects related to balance control and concussion! Please spread the word! tinyurl.com/bdz9tnat
tinyurl.com
Jobs | University of Utah
Founded in 1850, The University of Utah is the flagship institution of higher learning in Utah, and offers over 100 undergraduate and more than 90 graduate degree programs to over 30,000 students. Uni...
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Sjoerd Bruijn @smbruijn.bsky.social · 02/12/2024
Just updated my code to stream (acc, gyr, mag, etc) data from your phone to Matlab, so that it also works with newer versions of Android. Want to do some fun measurements with your phone, check it out! github.com/SjoerdBruijn...
github.com
GitHub - SjoerdBruijn/StreamPhoneData: Some matlab scripts to stream sensor data from Android and Iphone to Matlab
Some matlab scripts to stream sensor data from Android and Iphone to Matlab - SjoerdBruijn/StreamPhoneData
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Toby Ellmers @tobyellmers.bsky.social · 28/11/2024
First 'proper' post here (and a lazy quote repost at that :D). New paper published in J Neuroscience. Here we explore the neural mechanisms underpinning the paradoxical decreases in stability that occur when people try to consciously control balance. www.jneurosci.org/content/44/4...
jneurosci.org
A “Conscious” Loss of Balance: Directing Attention to Movement Can Impair the Cortical Response to Postural Perturbations
“Trying too hard” can interfere with skilled movement, such as sports and music playing. Postural control can similarly suffer when conscious attention is directed toward it (“conscious movement proce...
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Sjoerd Bruijn @smbruijn.bsky.social · 25/11/2024
New paper alert: "Balance training in older adults enhances feedback control after perturbations." with @jvandieen.bsky.social and other co-authors not yet in the sky! peerj.com/articles/185...
peerj.com
Balance training in older adults enhances feedback control after perturbations
Background As we age, avoiding falls becomes increasingly challenging. While balance training can mitigate such challenges, the specific mechanisms through which balance control improves remains uncle...
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Peer Community in Health & Movement Sciences @pci-hms.bsky.social · 25/11/2024
If you want a more affordable publishing system, you should prioritize the review of preprints with us 🙂
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Communications in Kinesiology (CiK) @cik.bsky.social · 25/11/2024
If you want a more affordable publishing system, you should prioritize review requests from non-profit Diamond Open Access journals like us 🙂
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Peer Community in Health & Movement Sciences @pci-hms.bsky.social · 24/11/2024
Once your preprint is peer-reviewed & recommended by us, if you decide to submit to a journal that is not @peercomjournal.bsky.social, please be sure to cite the @peercommunityin.bsky.social recommendation with its DOI to acknowledge our contribution & to make readers aware of the PCI initiative.
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Casper Albers 🟥 @casperalbers.nl · 23/11/2024
Het zijn vreemde tijden, ik ben het volmondig eens met Joost Eerdmans. Goed dat de oppositie zo breed mogelijk met een alternatief op de eppocalyps komt. Protesteren werkt! Wie kan: ga morgen naar het Malieveld 🟥 www.volkskrant.nl/politiek/opp...
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Sjoerd Bruijn @smbruijn.bsky.social · 21/11/2024
-no -no ;-)
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Sjoerd Bruijn @smbruijn.bsky.social · 20/11/2024
ISPGR is asking for yes/no debates. Who's in for one on topics like; - Is the XCoM a useful metric? - can we use perturbations to predict falls?
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Sjoerd Bruijn @smbruijn.bsky.social · 18/11/2024
Oh wow. Took me some time to really see this is indeed so…. Wow!
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Jeroen Smeets @jbjsmeets.bsky.social · 18/11/2024
When I was on Twitter, I asked how scientists determine the age of their human participants. As about two-thirds of the respondents (and 2/3 of authors) ask for rounded-down age, the average ages reported in the literature may be biased by half a year. Open access at doi.org/10.1016/j.ac...
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