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Surface EMG Analysis methods

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  • Surface EMG Analysis methods


    I am a research student undertaking a combined physiological and
    biomechanical study which I am currently writing up. The topic is an
    investigation into the effects of Hypoxic and Hyperoxic conditions on a
    variety of measures, including EMG. The study used 10 subjects who
    exercised on an arm-crank ergometer using an incremental step design to
    exhaustion. The workload was increased every 4 minutes and on average
    each subject completed 4 workloads. One of my reasons for doing this
    study is based on a paper by Kayser (1994) who used iEMG - therefore I
    have used the same measure. I collected EMG from the Biceps, Triceps and
    Anterior Deltoid muscles.

    I collected EMG continuously during the data collection from each
    subject and then used the following method to arrive at an iEMG value
    for each workload:

    -slice off the final 30s of EMG data (the rationale being the subject
    would be in physiological "steady state")

    -use the DC offset function to remove equipment noise.

    -RMS the filtered data.

    -Integrate the RMS data.

    I was wondering if Biomch-L subscribers could comment on my EMG signal
    analysis as to whether they think I have used the correct methodology or
    if there is a better method I may be able to use. I have all the EMG
    data saved and access to EMGWorks.

    Thanks very much,

    Graham Mytton

    University of Sunderland.