Reliability of surface EMG during sustained contractions of the quadriceps.

  title={Reliability of surface EMG during sustained contractions of the quadriceps.},
  author={Sunita Mathur and Janice J. Eng and Donna L Macintyre},
  journal={Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology},
  volume={15 1},
The purpose of this study was to determine test-retest reliability for median frequency (MDF) and amplitude of surface EMG during sustained fatiguing contractions of the quadriceps. Twenty-two healthy subjects (11 males and 11 females) were tested on two days held one week apart. Surface EMG was recorded from rectus femoris (RF), vastus lateralis (VL) and vastus medialis (VM) during sustained isometric contractions at 80% and 20% of maximal voluntary contraction (MVC) held to exhaustion… CONTINUE READING
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