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  • Equipment for Biomechanics teaching

    Dear Readers,

    We are about to launch the first of two new programmes here at HKIEd (one focussed on Sports Science in 2011-12 and the other in Health and Sport Studies in 2012-13), which will mean our undergraduate population here will increase significantly. Both programmes will include courses in biomechanics and exercise physiology (among other areas) and we are now preparing for the increased teaching usage of our Human Performance Laboratory. We will be offering courses at Introductory and Advanced levels.

    Our laboratory is already quite well-equipped for research purposes (e.g., 3D motion capture - both with markers and markerless, EMG, force platforms, etc.), but often this equipment can be quite time-consuming to use and generally involves only one subject, which means that for many students, the lab becomes more of a demonstration. As well, it is quite expensive and we try to limit the number of people actually controlling the equipment to those properly trained.

    We want to try to offer students more hands-on experiences which may mean we need multiples of somewhat simpler equipment for simultaneous use. We would like to have equipment that students could also use easily for self-study and/or revision. Also, our classes are a maximum of 3hrs and so set-up time should be minimal.

    We would like to seek members' input on what sort of teaching equipment they are using primarily for teaching in biomechanics. It would seem to us that teaching equipment may be different from research equipment and that some factors to consider include:
    • Robustness
    • Cost of purchase/maintenance
    • Ease of setup/operation
    • Minimal post-collection data processing

    Of course, this may not be an exhaustive list of considerations.

    We would appreciate any sharing of ideas and experiences in this topic area.

  • #2
    Re: Equipment for Biomechanics teaching

    Hi Drew!
    We have made some good experience in teaching the absolute basics of 2D motion analysis using the freeware Kinovea.


    The software offers possibility to synch and overlay videos (+ some features similar to dartfish) and has some simple tracking features (pattern matching, that does not work too stable under not so perfect conditions, but user intervention for correction is possible). Trajectories are stored as pixel coordinates or real-world coordinates, an origin can be set (otherwise trajectories are only relative, starting at 0/0 for each). It is possible to calibrate the system with objects/points of known length. Output frequency = input frequency so there is no deinterlacing and interpolating of missing lines as we know it from commercial optical motion analysis software, there is a "Deinterlace" function that reduces the comb-effect though. The software accepts a huge number of video formats so conversion is not often required (we tend to record the videos with the windows software and then open the avi-Files in Kinovea).

    As only trajectories are exported, our students have to
    - calculate real world coordinates from pixels
    - calculate velocity and acceleration of at least one marker-point
    - calculate an angle

    For these undergraduate courses we use very simple movement tasks (e.g. gait analysis (3 leg markers)).
    As this is freeware and according to the ECTS for the lab some hours of self-reliant work is required, the basics are shown and discussed during the lab session, the final work (tracking of all videos + data analysis in matlab) has to be done by the students themselves + they have to submit a short lab-paper with statistics etc.

    In case you need any further information, don't hesitate to contact me.
    Regards
    Stefan
    --
    DI(FH) Stefan Litzenberger
    University of Applied Sciences Technikum Wien
    Deputy Head of Department of Sports Engineering & Biomechanics
    Hoechstaedtplatz 5
    A-1200 Vienna
    Austria
    Tel: ++43 1 3334077 - 377
    Fax: ++43 1 3334077 - 369
    mailto:litzenberger@technikum-wien.at
    Technik studieren in Wien: Entdecken Sie die Bachelor-, Master- und Weiterbildungsangebote der FH Technikum Wien - praxisorientiert & innovativ!
    Last edited by Stefan Litzenberger; March 21, 2011, 10:20 AM. Reason: typos

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    • #3
      Re: Equipment for Biomechanics teaching

      "-Robustness
      -Cost of purchase/maintenance
      -Ease of setup/operation
      -Minimal post-collection data processing"
      Electromagnetic 3D Motion Trackers pass on all 4 parameters. In addition, they are 6DOF, no lighting conditions constraints and have minimum latency figures and are great for teaching purposes, and even for research, if metals can be avoided in the environment.

      Comment


      • #4
        Re: Equipment for Biomechanics teaching

        Hi Drew,
        as a lecture in sports science I have made some good experience with the software skillspector (http://video4coach.com/) for teaching 2D motion analysis based on video files. I have used it to determine joint angles and the trajectory of the center of mass. The determined values (position, angles) and their derivatives can be displayed in a diagram but can also be exported as normal text. In addition the software offers to define own models, what I have used to compare the results of different anthropometric models (e.g. Dempster, Clauser). As this is a freeware the students can do a lot work by their selves. The software also provides 3D motion analysis and a capture tool (skillcapture) but I have no tested it so far.

        Best regards

        Kirsten Albracht, PhD
        Institut of Biomechanics and Orthopaedics
        German Sport University Cologne

        E-Mail: albracht@dshs-koeln.de

        Comment


        • #5
          Re: Equipment for Biomechanics teaching

          Hi Drew,

          I'm a big fan of the Vernier products (http://www.vernier.com/probes/index.html). They have a range of sensors and systems. They are designed for K-12 students, but I have used them with my undergraduate biomechanics students (as well as with 3rd-8th graders). The software/projects can easily scale up or down depending on the level of the student. I've found the equipment to be virtually indestructible, and it's quite inexpensive. The forceplates (only measure in the vertical direction) are around $225 USD. The data can be analyzed using the Vernier software or can be exported out to Excel if you want the students to practice using Excel and to calculate the different parameters - again it's all dependent on how much you want the student to do / not do and what the emphasis of the lesson(s) is/are. They also have video capabilities and a basic sports science module. It's designed for a K-12 classroom, but I think it adequately challenged the UG students.

          Also, I've only used tech support once, they seemed really helpful, which is always a plus with new software/equipment.

          Feel free to email if you have questions, best, jody

          ---
          Jody Riskowski, PhD, CSCS
          Assistant Professor of Kinesiology
          Director, Stanley E. Fulton Biomehanics and Motor Behavior Laboratory
          University of Texas at El Paso
          1101 N. Campbell St.
          El Paso TX 79902
          Email: jlriskowski2@utep.edu

          ** Currently on leave from UTEP at the Institute for Aging Research in Boston (email: JodyRiskowski@hsl.harvard.edu)

          Comment


          • #6
            Re: Equipment for Biomechanics teaching

            Hi Drew,
            We use an instructional CD from Novel USA (www.novelusa.com) related to pressure distribution measurements. The material can be used for lecture, self study or laboratory activities. This material has been useful in my courses.

            Also, for simple analysis of still digital photos you can use Image J (available from the NIH) or CorelDraw. For an introduction to EMG, we use 2 channel clinical EMG units (http://www.theprogrp.com/index.php?o...d=38&Itemid=71). Data can be viewed on PC (connected to unit via serial port) and saved as ASCII for further manipulation in excel.

            Good luck.

            Tom
            --------------------------------------------
            Tom Kernozek, PhD, FACSM
            University of Wisconsin-La Crosse
            Department of Health Professions
            1300 Badger Street
            La Crosse, WI 54601

            Comment


            • #7
              Re: Equipment for Biomechanics teaching

              Great post Drew. I agree with several of the replies that suggest very resonable and durable equipement that can be used as labs/demonstrations with students.

              PASCO 2D portable force plate $400 and hand-held Explorer GLX data logger $300
              Video4coach qualitative video replay software or IMovie--no cost

              Other items I have had good experience and are also very inexpensive:
              SR300 Radar guns ($200-300)
              Stopwatches
              Goniometers and inclinometers
              Bathroom scales and spring scales
              4 wheeled scooters used in physical education
              High-speed video cameras (e.g. Casio EX-FH20 $400)

              Duane Knudson

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