Janis Fiedler
@fiejanis.bsky.social
PostDoc @KIT | wearable technology and mHealth Behavior Change | Exercise Physiology | enthusiastic R amateur | Views are my own
https://orcid.org/0000-0002-9291-2191
https://orcid.org/0000-0002-9291-2191
Pinned
Janis Fiedler
@fiejanis.bsky.social
· Nov 20
Introducing the #Wearable Landscape:
Issues pertaining to the validation of the measurement of 24-h physical activity, sedentary, and sleep behavior assessment.
doi.org/10.1016/j.js...
The 900+ validation studies are displayed on the accompanying website:
wearable-landscape.info/living-review
Issues pertaining to the validation of the measurement of 24-h physical activity, sedentary, and sleep behavior assessment.
doi.org/10.1016/j.js...
The 900+ validation studies are displayed on the accompanying website:
wearable-landscape.info/living-review
Reposted by Janis Fiedler
#MemberMonday
Insights from last week’s Wearable Landscape meeting: a big thanks to our core members and supporting students for weekly developing the initiative — and (of course) having some fun along the way :)
Let’s keep building our living network! 🌍💡
#Wearables #OpenScience #Collaboration
Insights from last week’s Wearable Landscape meeting: a big thanks to our core members and supporting students for weekly developing the initiative — and (of course) having some fun along the way :)
Let’s keep building our living network! 🌍💡
#Wearables #OpenScience #Collaboration
October 20, 2025 at 8:17 AM
#MemberMonday
Insights from last week’s Wearable Landscape meeting: a big thanks to our core members and supporting students for weekly developing the initiative — and (of course) having some fun along the way :)
Let’s keep building our living network! 🌍💡
#Wearables #OpenScience #Collaboration
Insights from last week’s Wearable Landscape meeting: a big thanks to our core members and supporting students for weekly developing the initiative — and (of course) having some fun along the way :)
Let’s keep building our living network! 🌍💡
#Wearables #OpenScience #Collaboration
Reposted by Janis Fiedler
Exciting new job in Landau 🤩 We’re searching for a Professor of Political
Psychology (W2). Very much looking forward to your applications – if you
have any questions, please reach out to me. jobs.rptu.de/jobposting/3...
Psychology (W2). Very much looking forward to your applications – if you
have any questions, please reach out to me. jobs.rptu.de/jobposting/3...
W 2-Professur für Politische Psychologie (m/w/d)
jobs.rptu.de
September 25, 2025 at 1:59 PM
Exciting new job in Landau 🤩 We’re searching for a Professor of Political
Psychology (W2). Very much looking forward to your applications – if you
have any questions, please reach out to me. jobs.rptu.de/jobposting/3...
Psychology (W2). Very much looking forward to your applications – if you
have any questions, please reach out to me. jobs.rptu.de/jobposting/3...
Can someone help me to find the full text of this?
doi.org/10.1080/1074...
I checked all my available ressources plus messaged the authors and need it for a systematic review.
@academic-chatter.bsky.social @healthpsychology.bsky.social #behSci #SportScience #AcademicSky 🧪
doi.org/10.1080/1074...
I checked all my available ressources plus messaged the authors and need it for a systematic review.
@academic-chatter.bsky.social @healthpsychology.bsky.social #behSci #SportScience #AcademicSky 🧪
Measurement properties of activity monitoring for a rehabilitation (AMoR) platform in post-stroke individuals in a simulated home environment
The aim of this study was to evaluate the measurement properties of activity monitoring for a rehabilitation (AMoR) platform for step counting, time spent in sedentary behavior, and postural change...
doi.org
September 26, 2025 at 7:41 AM
Can someone help me to find the full text of this?
doi.org/10.1080/1074...
I checked all my available ressources plus messaged the authors and need it for a systematic review.
@academic-chatter.bsky.social @healthpsychology.bsky.social #behSci #SportScience #AcademicSky 🧪
doi.org/10.1080/1074...
I checked all my available ressources plus messaged the authors and need it for a systematic review.
@academic-chatter.bsky.social @healthpsychology.bsky.social #behSci #SportScience #AcademicSky 🧪
Reposted by Janis Fiedler
🎓I'm thrilled to share that I've successfully defended my doctoral dissertation on July 25, 25. I want to extend my heartfelt gratitude to my esteemed supervisors, Dr. Marco Giurgiu & Prof. Markus Reichert & Prof. Uli Ebner-Priemer, for their invaluable guidance and support 🙏 @mhealthlab.bsky.social
August 2, 2025 at 5:29 AM
🎓I'm thrilled to share that I've successfully defended my doctoral dissertation on July 25, 25. I want to extend my heartfelt gratitude to my esteemed supervisors, Dr. Marco Giurgiu & Prof. Markus Reichert & Prof. Uli Ebner-Priemer, for their invaluable guidance and support 🙏 @mhealthlab.bsky.social
Reposted by Janis Fiedler
#OpenScience principles help students gain lots of useful skills that are an advantage on the job market in and beyond academia. Read our latest book chapter where we provide tips for educators to bolster employability through open science: doi.org/10.31219/osf...
July 3, 2025 at 5:15 AM
#OpenScience principles help students gain lots of useful skills that are an advantage on the job market in and beyond academia. Read our latest book chapter where we provide tips for educators to bolster employability through open science: doi.org/10.31219/osf...
📊 New Publication!
We analyzed 5000+ cycle ergometer tests (ages 14-64) to create reference standards of lactate thresholds for health studies and clinical practice.
Full text: doi.org/10.1080/0264...
#Exercise #SportsScience 🧪
We analyzed 5000+ cycle ergometer tests (ages 14-64) to create reference standards of lactate thresholds for health studies and clinical practice.
Full text: doi.org/10.1080/0264...
#Exercise #SportsScience 🧪
June 23, 2025 at 5:38 AM
📊 New Publication!
We analyzed 5000+ cycle ergometer tests (ages 14-64) to create reference standards of lactate thresholds for health studies and clinical practice.
Full text: doi.org/10.1080/0264...
#Exercise #SportsScience 🧪
We analyzed 5000+ cycle ergometer tests (ages 14-64) to create reference standards of lactate thresholds for health studies and clinical practice.
Full text: doi.org/10.1080/0264...
#Exercise #SportsScience 🧪
Reposted by Janis Fiedler
#MemberMonday Recap
The past seven weeks introduced each member of our Management Group. A huge thank you to Marco Giurgiu, @fiejanis.bsky.social, @irinatimm.bsky.social, Simon Woll, Til Becker, Doreen Wohlfahrt and @clendt.bsky.social for your contribution to Wearable Landscape!
#academicsky 🧪
The past seven weeks introduced each member of our Management Group. A huge thank you to Marco Giurgiu, @fiejanis.bsky.social, @irinatimm.bsky.social, Simon Woll, Til Becker, Doreen Wohlfahrt and @clendt.bsky.social for your contribution to Wearable Landscape!
#academicsky 🧪
June 2, 2025 at 11:48 AM
#MemberMonday Recap
The past seven weeks introduced each member of our Management Group. A huge thank you to Marco Giurgiu, @fiejanis.bsky.social, @irinatimm.bsky.social, Simon Woll, Til Becker, Doreen Wohlfahrt and @clendt.bsky.social for your contribution to Wearable Landscape!
#academicsky 🧪
The past seven weeks introduced each member of our Management Group. A huge thank you to Marco Giurgiu, @fiejanis.bsky.social, @irinatimm.bsky.social, Simon Woll, Til Becker, Doreen Wohlfahrt and @clendt.bsky.social for your contribution to Wearable Landscape!
#academicsky 🧪
Reposted by Janis Fiedler
Happy to be on board! Go check out @wearable-landscape.bsky.social if you haven’t already!
#MemberMonday
Claas Lendt ( @clendt.bsky.social ) is a research fellow at the University of Regensburg ( @uniregensburg.bsky.social ).
He is most interested in machine learning approaches to quantify free-living physical behaviour using #Wearables.
#OpenData #OpenScience 🔬
Claas Lendt ( @clendt.bsky.social ) is a research fellow at the University of Regensburg ( @uniregensburg.bsky.social ).
He is most interested in machine learning approaches to quantify free-living physical behaviour using #Wearables.
#OpenData #OpenScience 🔬
May 26, 2025 at 8:46 AM
Happy to be on board! Go check out @wearable-landscape.bsky.social if you haven’t already!
Manchmal ist es wirklich schwierig die Lehre zu füllen.
May 26, 2025 at 6:36 AM
Manchmal ist es wirklich schwierig die Lehre zu füllen.
Reposted by Janis Fiedler
#MemberMonday
Doreen Wohlfarth is a research assistant at @kit.edu . She is involved in various projects at the Sports Institute, with her current focus on the Wearable Landscape project. Here she supports our Living Review and other important publications.
#SportScience #BehSci #AcademicSky 🧪
Doreen Wohlfarth is a research assistant at @kit.edu . She is involved in various projects at the Sports Institute, with her current focus on the Wearable Landscape project. Here she supports our Living Review and other important publications.
#SportScience #BehSci #AcademicSky 🧪
May 19, 2025 at 7:05 AM
#MemberMonday
Doreen Wohlfarth is a research assistant at @kit.edu . She is involved in various projects at the Sports Institute, with her current focus on the Wearable Landscape project. Here she supports our Living Review and other important publications.
#SportScience #BehSci #AcademicSky 🧪
Doreen Wohlfarth is a research assistant at @kit.edu . She is involved in various projects at the Sports Institute, with her current focus on the Wearable Landscape project. Here she supports our Living Review and other important publications.
#SportScience #BehSci #AcademicSky 🧪
I need help. My day only has 1 meeting, and all emails are done. How does this research thing work again?
🧪 #AcademicSky
🧪 #AcademicSky
May 16, 2025 at 6:11 AM
I need help. My day only has 1 meeting, and all emails are done. How does this research thing work again?
🧪 #AcademicSky
🧪 #AcademicSky
Reposted by Janis Fiedler
Thanks to everybody who chimed in!
I arrived at the conclusion that (1) there's a lot of interesting stuff about interactions and (2) the figure I was looking for does not exist.
So, I made it myself! Here's a simple illustration of how to control for confounding in interactions:>
I arrived at the conclusion that (1) there's a lot of interesting stuff about interactions and (2) the figure I was looking for does not exist.
So, I made it myself! Here's a simple illustration of how to control for confounding in interactions:>
May 11, 2025 at 5:34 AM
Thanks to everybody who chimed in!
I arrived at the conclusion that (1) there's a lot of interesting stuff about interactions and (2) the figure I was looking for does not exist.
So, I made it myself! Here's a simple illustration of how to control for confounding in interactions:>
I arrived at the conclusion that (1) there's a lot of interesting stuff about interactions and (2) the figure I was looking for does not exist.
So, I made it myself! Here's a simple illustration of how to control for confounding in interactions:>
Reposted by Janis Fiedler
#MemberMonday
Til Becker is a student assistant researcher at the Karlsruhe Institute of Technology ( @kit.edu ) during his master's degree. He sees the Wearable Landscape as great opportunity to improve his own competences and the field of wearables.
#SportScience #BehSci #AcademicSky 🧪
Til Becker is a student assistant researcher at the Karlsruhe Institute of Technology ( @kit.edu ) during his master's degree. He sees the Wearable Landscape as great opportunity to improve his own competences and the field of wearables.
#SportScience #BehSci #AcademicSky 🧪
May 12, 2025 at 7:30 AM
#MemberMonday
Til Becker is a student assistant researcher at the Karlsruhe Institute of Technology ( @kit.edu ) during his master's degree. He sees the Wearable Landscape as great opportunity to improve his own competences and the field of wearables.
#SportScience #BehSci #AcademicSky 🧪
Til Becker is a student assistant researcher at the Karlsruhe Institute of Technology ( @kit.edu ) during his master's degree. He sees the Wearable Landscape as great opportunity to improve his own competences and the field of wearables.
#SportScience #BehSci #AcademicSky 🧪
Reposted by Janis Fiedler
🌱 This project is 100% non-commercial & driven by passion.
We believe science should be accessible, connected & efficient.
If you're working on, or interested in, wearable validation—follow along & join us!
We believe science should be accessible, connected & efficient.
If you're working on, or interested in, wearable validation—follow along & join us!
May 7, 2025 at 9:25 AM
🌱 This project is 100% non-commercial & driven by passion.
We believe science should be accessible, connected & efficient.
If you're working on, or interested in, wearable validation—follow along & join us!
We believe science should be accessible, connected & efficient.
If you're working on, or interested in, wearable validation—follow along & join us!
Reposted by Janis Fiedler
💡 There is even more:
We’re building a collaborative space for the scientific community to...
...share validation protocols
...coordinate studies
...pool equipment
...analyze data together
Let’s reduce redundancy & work smarter. #ResearchNetwork #OpenScience
We’re building a collaborative space for the scientific community to...
...share validation protocols
...coordinate studies
...pool equipment
...analyze data together
Let’s reduce redundancy & work smarter. #ResearchNetwork #OpenScience
May 7, 2025 at 9:25 AM
💡 There is even more:
We’re building a collaborative space for the scientific community to...
...share validation protocols
...coordinate studies
...pool equipment
...analyze data together
Let’s reduce redundancy & work smarter. #ResearchNetwork #OpenScience
We’re building a collaborative space for the scientific community to...
...share validation protocols
...coordinate studies
...pool equipment
...analyze data together
Let’s reduce redundancy & work smarter. #ResearchNetwork #OpenScience
Reposted by Janis Fiedler
🔍 What is Wearable Landscape?
An open-science project aiming to foster collaboration in the field of #Wearables. We want to bring experts together, to ultimately advance the validation and application in wearables that track 24-hour physical behavior (sleep, sedentary time, activity) #OpenScience
An open-science project aiming to foster collaboration in the field of #Wearables. We want to bring experts together, to ultimately advance the validation and application in wearables that track 24-hour physical behavior (sleep, sedentary time, activity) #OpenScience
Wearable Landscape - Wearable Landscape
wearable-landscape.info
May 7, 2025 at 9:25 AM
🔍 What is Wearable Landscape?
An open-science project aiming to foster collaboration in the field of #Wearables. We want to bring experts together, to ultimately advance the validation and application in wearables that track 24-hour physical behavior (sleep, sedentary time, activity) #OpenScience
An open-science project aiming to foster collaboration in the field of #Wearables. We want to bring experts together, to ultimately advance the validation and application in wearables that track 24-hour physical behavior (sleep, sedentary time, activity) #OpenScience
My first last-authorship publication is now online!
We combined 2 nationwide data sets and found physical exercise and non-smoking to be the most important correlates of aerobic fitness in 14-64.
Led by the great Maximiliane Thron
#AcademicSky #SportScience #BehSci 🧪
dx.doi.org/10.1002/ejsc...
We combined 2 nationwide data sets and found physical exercise and non-smoking to be the most important correlates of aerobic fitness in 14-64.
Led by the great Maximiliane Thron
#AcademicSky #SportScience #BehSci 🧪
dx.doi.org/10.1002/ejsc...
Correlates of Aerobic Performance in Adolescents and Adults
Cardiorespiratory fitness (CRF) is considered as a main indicator of cardiovascular health and is associated with a reduced risk of noncommunicable diseases. The objective is to explore the potential...
dx.doi.org
April 29, 2025 at 7:27 AM
My first last-authorship publication is now online!
We combined 2 nationwide data sets and found physical exercise and non-smoking to be the most important correlates of aerobic fitness in 14-64.
Led by the great Maximiliane Thron
#AcademicSky #SportScience #BehSci 🧪
dx.doi.org/10.1002/ejsc...
We combined 2 nationwide data sets and found physical exercise and non-smoking to be the most important correlates of aerobic fitness in 14-64.
Led by the great Maximiliane Thron
#AcademicSky #SportScience #BehSci 🧪
dx.doi.org/10.1002/ejsc...
Reposted by Janis Fiedler
In der Promotion fand ich Schreiben oft quälend, hab mit jeder Formulierung gekämpft & gehadert. Das hat sich inzwischen zum Glück verändert — v.a. durch Schreibkollaborationen, die das Zutrauen in mein Schreiben gestärkt haben, & durch Routine. Was ich daraus gelernt hab: Heute in #ArbeitInDerWiss!
Weiter im Text: Vom Schreiben inner- und außerhalb der Wissenschaft
Der beste Text ist einer, der gut genug ist, um fertig zu sein.
arbeitinderwissenschaft.substack.com
April 22, 2025 at 7:13 AM
In der Promotion fand ich Schreiben oft quälend, hab mit jeder Formulierung gekämpft & gehadert. Das hat sich inzwischen zum Glück verändert — v.a. durch Schreibkollaborationen, die das Zutrauen in mein Schreiben gestärkt haben, & durch Routine. Was ich daraus gelernt hab: Heute in #ArbeitInDerWiss!
The joy of post-holiday email dschungle.
Do you start with the newest or the oldest ones?
🧪 #AcademicSky
Do you start with the newest or the oldest ones?
🧪 #AcademicSky
April 22, 2025 at 7:17 AM
The joy of post-holiday email dschungle.
Do you start with the newest or the oldest ones?
🧪 #AcademicSky
Do you start with the newest or the oldest ones?
🧪 #AcademicSky
Reposted by Janis Fiedler
New week, new #MemberMonday
Dr. Janis Fiedler ( @fiejanis.bsky.social ) is a post-doctoral researcher @kit.edu . His main research interests include #mhealth interventions, and #ExercisePhysiology. He is dedicated to foster an open science culture for the validation of wearables.
Dr. Janis Fiedler ( @fiejanis.bsky.social ) is a post-doctoral researcher @kit.edu . His main research interests include #mhealth interventions, and #ExercisePhysiology. He is dedicated to foster an open science culture for the validation of wearables.
April 21, 2025 at 7:11 AM
New week, new #MemberMonday
Dr. Janis Fiedler ( @fiejanis.bsky.social ) is a post-doctoral researcher @kit.edu . His main research interests include #mhealth interventions, and #ExercisePhysiology. He is dedicated to foster an open science culture for the validation of wearables.
Dr. Janis Fiedler ( @fiejanis.bsky.social ) is a post-doctoral researcher @kit.edu . His main research interests include #mhealth interventions, and #ExercisePhysiology. He is dedicated to foster an open science culture for the validation of wearables.
Reposted by Janis Fiedler
Welcome Marco to our first #MemberMonday introducing our team:
Dr. Marco Giurgiu is a postdoc @kit.edu and focuses his research on the relationship between 24-h #PhysicalBehavior and #Health. He initated and leads our initiative with the vision of a global network to address challenges together.
Dr. Marco Giurgiu is a postdoc @kit.edu and focuses his research on the relationship between 24-h #PhysicalBehavior and #Health. He initated and leads our initiative with the vision of a global network to address challenges together.
April 14, 2025 at 5:36 AM
Welcome Marco to our first #MemberMonday introducing our team:
Dr. Marco Giurgiu is a postdoc @kit.edu and focuses his research on the relationship between 24-h #PhysicalBehavior and #Health. He initated and leads our initiative with the vision of a global network to address challenges together.
Dr. Marco Giurgiu is a postdoc @kit.edu and focuses his research on the relationship between 24-h #PhysicalBehavior and #Health. He initated and leads our initiative with the vision of a global network to address challenges together.
Reposted by Janis Fiedler
Missed the #ISBNPA Systems Science SIG #Webinar "An introduction to systems approaches in public health – where are we up to and how are they being used?"
Now’s your chance to catch up!
🎬 Watch the recording here: isbnpa.org/sig/march-24...
Now’s your chance to catch up!
🎬 Watch the recording here: isbnpa.org/sig/march-24...
March 28, 2025 at 9:52 AM
Missed the #ISBNPA Systems Science SIG #Webinar "An introduction to systems approaches in public health – where are we up to and how are they being used?"
Now’s your chance to catch up!
🎬 Watch the recording here: isbnpa.org/sig/march-24...
Now’s your chance to catch up!
🎬 Watch the recording here: isbnpa.org/sig/march-24...
Reposted by Janis Fiedler
The problem with working on big high-risk projects is they don't always end in the glorious impactful work. If they're truly 'high risk', they often just end in failure. Or else requiring huge effort to save.
I'm painfully learning this lesson after seeing a few of my 'flagship' projects crash.
🧵
I'm painfully learning this lesson after seeing a few of my 'flagship' projects crash.
🧵
March 26, 2025 at 12:11 PM
The problem with working on big high-risk projects is they don't always end in the glorious impactful work. If they're truly 'high risk', they often just end in failure. Or else requiring huge effort to save.
I'm painfully learning this lesson after seeing a few of my 'flagship' projects crash.
🧵
I'm painfully learning this lesson after seeing a few of my 'flagship' projects crash.
🧵
Do you use wearables or plan to implement them in your research? Then check out the @wearemntn.bsky.social !
#digitalhealth 🧪 #Wearables #SportScience
#digitalhealth 🧪 #Wearables #SportScience
Stay connected and get the latest updates on #wearables!
Sign up for our mailing list 📨✨
Sign up for our mailing list 📨✨
Contact - Wearable Landscape
wearable-landscape.info
March 26, 2025 at 10:36 AM
Do you use wearables or plan to implement them in your research? Then check out the @wearemntn.bsky.social !
#digitalhealth 🧪 #Wearables #SportScience
#digitalhealth 🧪 #Wearables #SportScience
Reposted by Janis Fiedler
🗺️Discover more details on our website and have a look at our #LivingReview.
Wearable Landscape - Wearable Landscape
wearable-landscape.info
March 7, 2025 at 12:58 PM
🗺️Discover more details on our website and have a look at our #LivingReview.