Movement variability response to change in the rate of hopping

• Autorzy: Fietzer Abbigail L. , Koyama Yumiko , Kulig Kornelia

Identyfikatory

DOI

10.5277/ABB-01414-2019-03

• Języki publikacji: EN

Abstrakty

EN

Movement variability is often considered undesirable, but growing evidence demonstrates positive aspects of variability. During unipedal hopping, control of limb stiffness and limb length are paramount. Purpose: The purpose of this study was to compare two methods of measuring movement variability that provide information at the task level, and their capacities to illuminate the neuromotor control system’s response to change in hopping rate. Methods: The typical task-level movement variability measure of the standard deviation of vertical limb length was compared to uncontrolled manifold analysis. We examined the relationship between change scores in deviation from spring-mass model-type behavior and these two variability measures for the shift from typical (2.3 Hz) to slow (1.7 Hz) hopping. Results: The change scores for deviation from spring-mass model-type behavior and vertical limb length standard deviation demonstrated no correlation ( p = 0.784, R = 0.051). In contrast, the change scores for deviation from spring-mass model-type behavior and the uncontrolled manifold analysis measure demonstrated a moderate correlation ( p = 0.004, R = 0.502). Conclusions: Uncontrolled manifold analysis considers not just variability in the sense of error, but illustrates how the neuromotor control system distributes movement variability into performance-irrelevant and performance-destabilizing subspaces. As such, this type of analysis may be more effective at illuminating global control aspects of movement variability than the typical variability measure of limb length standard deviation.

Słowa kluczowe

EN

uncontrolled manifold; spring mass model; segmental coordination

PL

kolektor; model; koordynacja segmentowa

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2019
• Tom: Vol. 21, no. 4
• Strony: 37--45
• Opis fizyczny: Bibliogr. 24 poz., tab., wykr.

Twórcy

autor

Fietzer Abbigail L.

• Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA
• Department of Physical Therapy, Mount Saint Mary’s University, Los Angeles, CA, USA

autor

Koyama Yumiko

• Department of Human Health Sciences, Kyoto University, Kyoto, Japan
• Department of Tokyo Physical Therapy, Faculty of Medical Sciences, Teikyo University of Science, Tokyo, Japan

autor

Kulig Kornelia

• Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).