Prof. Dr.-Ing. Bert Arnrich

Human Motion Analysis

The Human Motion Analysis research group, part of the connected healthcare chair, is a hub of innovation and exploration in healthcare technology. We focus on developing and applying advanced motion analysis techniques, such as real-time pose estimation and analysis of point cloud data, to enhance healthcare applications. We utilize cutting-edge tools, including Inertial Measurement Units (IMUs), 3D cameras, and machine learning algorithms. The scope of our research extends to mental health, exploring the complexities of disorders like Obsessive-Compulsive Disorder (OCD) and bipolar by employing biofeedback methods and human activity recognition. Our group is also involved in creating realistic synthetic data simulations in gaming engines such as Unity, understanding sensor placement optimization, and combining different sensor inputs into a multimodal classification approach. We value collaboration and knowledge-sharing and welcome students and researchers eager to contribute to and learn from our diverse projects.


Current Research Topics

  • Activity Recognition for the Detection of OCD
  • Activity Recognition for Nursing Activities
  • Gait Analysis
  • Movement Analysis in Sports


Justin Albert

Phone: +49-(0)331 5509-4853

Room: G-2.1.20

Email: justin.albert(at)hpi.de

Orhan Konak

Phone: +49-(0)331 5509-4826

Room: G-2.1.13

Email: orhan.konak(at)hpi.de


Kristina Kirsten

Phone: +49-(0)331 5509-4854

Room: G-2.1.13

Email: kristina.kirsten(at)hpi.de­


Lin Zhou

Phone: +49-(0)331 5509-4852

Room: G-2.1.12

Email: lin.zhou(at)hpi.de



  • A computer vision approach to continuously monitor fatigue during resistance training. Albert, Justin Amadeus; Arnrich, Bert in Biomedical Signal Processing and Control (2024). 89 105701.
  • Analyzing population-leve... - Download
    Analyzing population-level trials as N-of-1 trials: An application to gait. Zhou, Lin; Schneider, Juliana; Arnrich, Bert; Konigorski, Stefan in Contemporary Clinical Trials Communications (2024). 101282.


  • Federated Learning for Activity Recognition: A System Level Perspective. Kalabakov, Stefan; Jovanovski, Borche; Denkovski, Daniel; Rakovic, Valentin; Pfitzner, Bjarne; Konak, Orhan; Arnrich, Bert; Gjoreski, Hristijan in IEEE Access (2023). 11 64442–64457.
  • HARE: Unifying the Human Activity Recognition Engineering Workflow. Konak, Orhan; van de Water, Robin; Döring, Valentin; Fiedler, Tobias; Liebe, Lucas; Masopust, Leander; Postnov, Kirill; Sauerwald, Franz; Treykorn, Felix; Wischmann, Alexander; Gjoreski, Hristijan; Luštrek, Mitja; Arnrich, Bert in Sensors (2023). 23(23)
  • Overcoming Data Scarcity in Human Activity Recognition. Konak, Orhan; Liebe, Lucas; Postnov, Kirill; Sauerwald, Franz; Gjoreski, Hristijan; Luštrek, Mitja; Arnrich, Bert in IEEE EMBC 2023 (2023).
  • A Real-time Human Pose Estimation Approach for Optimal Sensor Placement in Sensor-based Human Activity Recognition. Konak, Orhan; Wischmann, Alexander; van De Water, Robin; Arnrich, Bert (2023). 1–6.
  • SONAR, a nursing activity dataset with inertial sensors. Konak, Orhan; Döring, Valentin; Fiedler, Tobias; Liebe, Lucas; Masopust, Leander; Postnov, Kirill; Sauerwald, Franz; Treykorn, Felix; Wischmann, Alexander; Kalabakov, Stefan; others in Scientific Data (2023). 10(1) 727.
  • DUO-GAIT: A gait dataset ... - Download
    DUO-GAIT: A gait dataset for walking under dual-task and fatigue conditions with inertial measurement units. Zhou, Lin; Fischer, Eric; Brahms, Clemens Markus; Granacher, Urs; Arnrich, Bert (2023).
  • Protocol for a Randomized... - Download
    Protocol for a Randomized Crossover Trial to Evaluate the Effect of Soft Brace and Rigid Orthosis on Performance and Readiness to Return to Sport Six Months Post-ACL-Reconstruction. Jahnke, Sonja; Cruysen, Caren; Prill, Robert; Kittmann, Fabian; Pflug, Nicola; Albert, Justin Amadeus; de Camargo, Tibor; Arnrich, Bert; Królikowska, Aleksandra; Kołcz, Anna; Reichert, Paweł; Oleksy, Łukasz; Michel, Sven; Kopf, Sebastian; Wagner, Michael; Scheffler, Sven; Becker, Roland in Healthcare (2023). 11(4)


  • Unsupervised Activity Rec... - Download
    Unsupervised Activity Recognition Using Trajectory Heatmaps from Inertial Measurement Unit Data. Konak., Orhan; Wegner., Pit; Albert., Justin; Arnrich., Bert (2022). 304–312.
  • SensorHub: Multimodal Sen... - Download
    SensorHub: Multimodal Sensing in Real-Life Enables Home-Based Studies. Chromik, Jonas; Kirsten, Kristina; Herdick, Arne; Kappattanavar, Arpita Mallikarjuna; Arnrich, Bert in Sensors (2022). 22(1)
  • Hand Gesture Recognition ... - Download
    Hand Gesture Recognition in Daily Life as an Additional Tool for Unobtrusive Data Labeling in Medical Studies. Joch, Julia; Kirsten, Kristina; Arnrich, Bert (2022).
  • Elements of a System for ... - Download
    Elements of a System for Automatic Monitoring of Specific Mental Health Characteristics at Home. Kirsten, Kristina; Arnrich, Bert (2022).
  • PERSIST: A Multimodal Dataset for the Prediction of Perceived Exertion during Resistance Training. Albert, Justin Amadeus; Herdick, Arne; Brahms, Clemens Markus; Granacher, Urs; Arnrich, Bert in Data (2022). 8(1)


  • Optimal Sensor Placement ... - Download
    Optimal Sensor Placement for Human Activity Recognition with a Minimal Smartphone–IMU Setup. Rahn, Vincent Xeno; Zhou, Lin; Klieme, Eric; Arnrich, Bert (2021). (Vol. 10) 37–48.
  • Sensor-Based Obsessive-Co... - Download
    Sensor-Based Obsessive-Compulsive Disorder Detection With Personalised Federated Learning. Kirsten, Kristina; Pfitzner, Bjarne; Löper, Lando; Arnrich, Bert (2021). 333–339.
  • Using Machine Learning to... - Download
    Using Machine Learning to Predict Perceived Exertion During Resistance Training With Wearable Heart Rate and Movement Sensors. Albert, Justin; Herdick, Arne; Brahms, Clemens Markus; Granacher, Urs; Arnrich, Bert (2021).
  • TRIPOD—A Treadmill Walk... - Download
    TRIPOD—A Treadmill Walking Dataset with IMU, Pressure-Distribution and Photoelectric Data for Gait Analysis. Trautmann, Justin; Zhou, Lin; Brahms, Clemens Markus; Tunca, Can; Ersoy, Cem; Granacher, Urs; Arnrich, Bert in Data (2021). 6(9) 95.
  • Data Augmentation of Kine... - Download
    Data Augmentation of Kinematic Time-Series From Rehabilitation Exercises Using GANs. Albert, Justin; Glöckner, Pawel; Pfitzner, Bjarne; Arnrich, Bert (2021). 1–6.


  • Validation of an IMU Gait... - Download
    Validation of an IMU Gait Analysis Algorithm for Gait Monitoring in Daily Life Situations. Zhou, Lin; Tunca, Can; Fischer, Eric; Brahms, Clemens Markus; Ersoy, Cem; Granacher, Urs; Arnrich, Bert (2020).
  • How We Found Our IMU: Gui... - Download
    How We Found Our IMU: Guidelines to IMU Selection and a Comparison of Seven IMUs for Pervasive Healthcare Applications. Zhou, Lin; Fischer, Eric; Tunca, Can; Brahms, Clemens Markus; Ersoy, Cem; Granacher, Urs; Arnrich, Bert in Sensors (2020).
  • Will You Be My Quarantine... - Download
    Will You Be My Quarantine: A Computer Vision and Inertial Sensor Based Home Exercise System. Albert, Justin; Zhou, Lin; Gloeckner, Pawel; Trautmann, Justin; Ihde, Lisa; Eilers, Justus; Kamal, Mohammed; Arnrich, Bert (2020). (Vol. 14)
  • Evaluation of the Pose Tr... - Download
    Evaluation of the Pose Tracking Performance of the Azure Kinect and Kinect v2 for Gait Analysis in Comparison with a Gold Standard: A Pilot Study. Albert, Justin; Owolabi, Victor; Gebel, Arnd; Brahms, Markus Clemens; Granacher, Urs; Arnrich, Bert in MDPI Sensors (2020). 20(18)
  • IMU-Based Movement Trajec... - Download
    IMU-Based Movement Trajectory Heatmaps for Human Activity Recognition. Konak, Orhan; Wegner, Pit; Arnrich, Bert in Sensors (Switzerland) (2020). 20(24) 1–15.


  • Unobtrusive Measurement o... - Download
    Unobtrusive Measurement of Blood Pressure During Lifestyle Interventions. Morassi Sasso, Ariane; Datta, Suparno; Pfitzner, Bjarne; Zhou, Lin; Steckhan, Nico; Boettinger, Erwin; Arnrich, Bert (2019).
  • MORPHER – A Platform to Support Modeling of Outcome and Risk Prediction in Health Research. Freitas da Cruz, Harry; Bergner, Benjamin; Konak, Orhan; Schneider, Frederic; Bode, Philipp; Lempert, Conrad; Schapranow, Matthieu-P. (2019).
  • An Information and Communication Platform Supporting Analytics for Elderly Care. Konak, Orhan; Freitas Da Cruz, Harry; Thiele, Marvin; Golla, David; Schapranow, Matthieu-P. (2019).


  • Geometric Algebra Computi... - Download
    Geometric Algebra Computing for Heterogeneous Systems. Hildenbrand, D.; Albert, Justin; Charrier, P.; Steinmetz, C. in Advances in Applied Clifford Algebras (2017). 27 599–620.