Test-Retest reliability of the internal shoulder rotator muscles' stretch reflex in healthy men

Lars Heinke*, Axel Knicker, Kirsten Albracht

*Korrespondierende*r Autor*in für diese Arbeit

Publikation: Beitrag in FachzeitschriftZeitschriftenaufsätzeForschungBegutachtung


Until now the reproducibility of the short latency stretch reflex of the internal rotator muscles of the glenohumeral joint has not been identified. Twenty-three healthy male participants performed three sets of external shoulder rotation stretches with various pre-activation levels on two different dates of measurement to assess test–retest reliability. All stretches were applied with a dynamometer acceleration of 104°/s2 and a velocity of 150°/s. Electromyographical response was measured via surface EMG. Reflex latencies showed a pre-activation effect (ƞ2 = 0,355). ICC ranged from 0,735 to 0,909 indicating an overall “good” relative reliability. SRD 95% lay between ±7,0 to ±12,3 ms. The reflex gain showed overall poor test–retest reproducibility. The chosen methodological approach presented a suitable test protocol for shoulder muscles stretch reflex latency evaluation. A proof-of-concept study to validate the presented methodical approach in shoulder involvement including subjects with clinically relevant conditions is recommended.
ZeitschriftJournal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology
PublikationsstatusVeröffentlicht - 02.2022

Fachgebiete und Schlagwörter

  • Intraclass correlation coefficient
  • Shoulder
  • Standard error of measurement
  • Stretch reflex
  • Test–retest reliability


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