Quantitative Intramuscular Myoelectric Activity of Lumbar Portions of Psoas and the Abdominal Wall during Cycling

  title={Quantitative Intramuscular Myoelectric Activity of Lumbar Portions of Psoas and the Abdominal Wall during Cycling},
  author={D Juker and Stuart M. McGill and P Andrea Kropf},
  journal={Journal of Applied Biomechanics},
The purpose of this study was to quantify activation using intramuscular EMG from lumbar psoas and the three layers of the abdominal wall during several styles of cycling: normal posture (slightly flexed), upright posture, racing in flexed posture, standing up from the saddle, and standing during maximal sprint effort. Lumbar erector spinae and rectus femoris were also monitored with surface electrodes. Results demonstrated that the activity patterns were influenced by the style of cycling… 

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