Economy, Movement Dynamics, and Muscle Activity of Human Walking at Different Speeds

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Standard

Economy, Movement Dynamics, and Muscle Activity of Human Walking at Different Speeds. / Raffalt, P C; Guul, M K; Nielsen, Andreas Nexmann; Puthusserypady, S; Alkjær, T.

I: Scientific Reports, Bind 7, 43986, 2017.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Raffalt, PC, Guul, MK, Nielsen, AN, Puthusserypady, S & Alkjær, T 2017, 'Economy, Movement Dynamics, and Muscle Activity of Human Walking at Different Speeds', Scientific Reports, bind 7, 43986. https://doi.org/10.1038/srep43986

APA

Raffalt, P. C., Guul, M. K., Nielsen, A. N., Puthusserypady, S., & Alkjær, T. (2017). Economy, Movement Dynamics, and Muscle Activity of Human Walking at Different Speeds. Scientific Reports, 7, [43986]. https://doi.org/10.1038/srep43986

Vancouver

Raffalt PC, Guul MK, Nielsen AN, Puthusserypady S, Alkjær T. Economy, Movement Dynamics, and Muscle Activity of Human Walking at Different Speeds. Scientific Reports. 2017;7. 43986. https://doi.org/10.1038/srep43986

Author

Raffalt, P C ; Guul, M K ; Nielsen, Andreas Nexmann ; Puthusserypady, S ; Alkjær, T. / Economy, Movement Dynamics, and Muscle Activity of Human Walking at Different Speeds. I: Scientific Reports. 2017 ; Bind 7.

Bibtex

@article{a6c869b44a654e5a9ae2b28261a1f53a,
title = "Economy, Movement Dynamics, and Muscle Activity of Human Walking at Different Speeds",
abstract = "The complex behaviour of human walking with respect to movement variability, economy and muscle activity is speed dependent. It is well known that a U-shaped relationship between walking speed and economy exists. However, it is an open question if the movement dynamics of joint angles and centre of mass and muscle activation strategy also exhibit a U-shaped relationship with walking speed. We investigated the dynamics of joint angle trajectories and the centre of mass accelerations at five different speeds ranging from 20 to 180% of the predicted preferred speed (based on Froude speed) in twelve healthy males. The muscle activation strategy and walking economy were also assessed. The movement dynamics was investigated using a combination of the largest Lyapunov exponent and correlation dimension. We observed an intermediate stage of the movement dynamics of the knee joint angle and the anterior-posterior and mediolateral centre of mass accelerations which coincided with the most energy-efficient walking speed. Furthermore, the dynamics of the joint angle trajectories and the muscle activation strategy was closely linked to the functional role and biomechanical constraints of the joints.",
author = "Raffalt, {P C} and Guul, {M K} and Nielsen, {Andreas Nexmann} and S Puthusserypady and T Alkj{\ae}r",
year = "2017",
doi = "10.1038/srep43986",
language = "English",
volume = "7",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "nature publishing group",

}

RIS

TY - JOUR

T1 - Economy, Movement Dynamics, and Muscle Activity of Human Walking at Different Speeds

AU - Raffalt, P C

AU - Guul, M K

AU - Nielsen, Andreas Nexmann

AU - Puthusserypady, S

AU - Alkjær, T

PY - 2017

Y1 - 2017

N2 - The complex behaviour of human walking with respect to movement variability, economy and muscle activity is speed dependent. It is well known that a U-shaped relationship between walking speed and economy exists. However, it is an open question if the movement dynamics of joint angles and centre of mass and muscle activation strategy also exhibit a U-shaped relationship with walking speed. We investigated the dynamics of joint angle trajectories and the centre of mass accelerations at five different speeds ranging from 20 to 180% of the predicted preferred speed (based on Froude speed) in twelve healthy males. The muscle activation strategy and walking economy were also assessed. The movement dynamics was investigated using a combination of the largest Lyapunov exponent and correlation dimension. We observed an intermediate stage of the movement dynamics of the knee joint angle and the anterior-posterior and mediolateral centre of mass accelerations which coincided with the most energy-efficient walking speed. Furthermore, the dynamics of the joint angle trajectories and the muscle activation strategy was closely linked to the functional role and biomechanical constraints of the joints.

AB - The complex behaviour of human walking with respect to movement variability, economy and muscle activity is speed dependent. It is well known that a U-shaped relationship between walking speed and economy exists. However, it is an open question if the movement dynamics of joint angles and centre of mass and muscle activation strategy also exhibit a U-shaped relationship with walking speed. We investigated the dynamics of joint angle trajectories and the centre of mass accelerations at five different speeds ranging from 20 to 180% of the predicted preferred speed (based on Froude speed) in twelve healthy males. The muscle activation strategy and walking economy were also assessed. The movement dynamics was investigated using a combination of the largest Lyapunov exponent and correlation dimension. We observed an intermediate stage of the movement dynamics of the knee joint angle and the anterior-posterior and mediolateral centre of mass accelerations which coincided with the most energy-efficient walking speed. Furthermore, the dynamics of the joint angle trajectories and the muscle activation strategy was closely linked to the functional role and biomechanical constraints of the joints.

U2 - 10.1038/srep43986

DO - 10.1038/srep43986

M3 - Journal article

C2 - 28272484

VL - 7

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

M1 - 43986

ER -

ID: 174347823