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I How to measure muscle strain

  1. May 15, 2018 #1
    I am trying to figure out if there is a way to measure muscle strain.

    If I apply a force F to compress a hand grip to the maximum distance x
    The work done to compress the hand grip is F*x

    Work done = Fx

    Since work done = energy used, I can change the equation to:

    Energy used = Fx

    When our muscles use energy to perform work, we get muscle strain. I can change the wording to:

    Muscle strain = Fx

    If I continue to hold on to the hand grip so that it would not spring back, I need to maintain the energy used. As time passes, more energy is used (no work is done) because I can feel that the muscle strain becomes muscle pain.

    If I hold on to the hand grip for 10 s. Can I define the muscle strain to be:

    Muscle strain = Fx * 10s (and the scientific unit is Nms)

    I don't have to go into the cellular level to explain the various chemical reactions that take place to maintain the hand grip in compressed position. I just have to know the external force acting on my hand muscles.

    I can't find any literature to scientifically measure muscle strain. Can I define muscle strain as such since no one has done it?
  2. jcsd
  3. May 15, 2018 #2


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    Science Advisor

    In fact, work done is not equal to energy used. Energy can be used to perform useful work or can be used and wasted. Chemical energy used by a hand straining without moving is wasted.
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