A dynamical systems investigation of lower extremity coordination during running over obstacles

Nicholas Stergiou, Jody L. Jensen, Barry T. Bates, Shane D. Scholten, George Tzetzis

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Objective. To investigate intralimb coordination during running over a level surface and over obstacles of three different heights. Design. The phasing relationships between the foot and leg motions in the frontal plane, and the shank and thigh motions in the sagittal plane were used to compare patterns of coordination. Background. The coordinated actions of lower extremity segments are necessary to absorb the impact forces generated during running. The behavioral patterns of these segments can be studied under changing task demands using analysis techniques from the Dynamical Systems Theory. Methods. Ten subjects ran at their self-selected pace under four conditions: over a level surface and over obstacles of different heights (5%, 10%, 15% of their standing height). A force platform was used to record impact forces during landing after obstacle clearance, while kinematics were collected using a two-camera system. Results. The increases in obstacle height resulted in significant changes in impact forces (34% increase between the two extreme conditions) and more in-phase relationships between the segments during early stance. No changes were observed in the variability of the phasing relationships. Conclusions. The coordination changes observed might be compensatory strategies aimed to reduce forces and potential injury. However, since the impact forces still increased significantly, it is also possible that the observed changes might be at-risk movement patterns predisposing runners to injury. Relevance - Tools from the Dynamical Systems Theory, such as intralimb coordination, can be used as a way to evaluate running mechanics so that comparisons can be made to various patient populations in subsequent studies. This approach might be a viable alternative to examine questions in therapeutics.

Original languageEnglish (US)
Pages (from-to)213-221
Number of pages9
JournalClinical Biomechanics
Volume16
Issue number3
DOIs
StatePublished - Mar 10 2001

Fingerprint

Systems Theory
Lower Extremity
Wounds and Injuries
Thigh
Mechanics
Biomechanical Phenomena
Foot
Leg
Population
Therapeutics

Keywords

  • Coordination
  • Dynamical systems
  • Impact forces
  • Lower extremity
  • Obstacle
  • Running

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine

Cite this

A dynamical systems investigation of lower extremity coordination during running over obstacles. / Stergiou, Nicholas; Jensen, Jody L.; Bates, Barry T.; Scholten, Shane D.; Tzetzis, George.

In: Clinical Biomechanics, Vol. 16, No. 3, 10.03.2001, p. 213-221.

Research output: Contribution to journalArticle

Stergiou, Nicholas ; Jensen, Jody L. ; Bates, Barry T. ; Scholten, Shane D. ; Tzetzis, George. / A dynamical systems investigation of lower extremity coordination during running over obstacles. In: Clinical Biomechanics. 2001 ; Vol. 16, No. 3. pp. 213-221.
@article{0cab74a0f7434fe8951018f1d60e47d5,
title = "A dynamical systems investigation of lower extremity coordination during running over obstacles",
abstract = "Objective. To investigate intralimb coordination during running over a level surface and over obstacles of three different heights. Design. The phasing relationships between the foot and leg motions in the frontal plane, and the shank and thigh motions in the sagittal plane were used to compare patterns of coordination. Background. The coordinated actions of lower extremity segments are necessary to absorb the impact forces generated during running. The behavioral patterns of these segments can be studied under changing task demands using analysis techniques from the Dynamical Systems Theory. Methods. Ten subjects ran at their self-selected pace under four conditions: over a level surface and over obstacles of different heights (5{\%}, 10{\%}, 15{\%} of their standing height). A force platform was used to record impact forces during landing after obstacle clearance, while kinematics were collected using a two-camera system. Results. The increases in obstacle height resulted in significant changes in impact forces (34{\%} increase between the two extreme conditions) and more in-phase relationships between the segments during early stance. No changes were observed in the variability of the phasing relationships. Conclusions. The coordination changes observed might be compensatory strategies aimed to reduce forces and potential injury. However, since the impact forces still increased significantly, it is also possible that the observed changes might be at-risk movement patterns predisposing runners to injury. Relevance - Tools from the Dynamical Systems Theory, such as intralimb coordination, can be used as a way to evaluate running mechanics so that comparisons can be made to various patient populations in subsequent studies. This approach might be a viable alternative to examine questions in therapeutics.",
keywords = "Coordination, Dynamical systems, Impact forces, Lower extremity, Obstacle, Running",
author = "Nicholas Stergiou and Jensen, {Jody L.} and Bates, {Barry T.} and Scholten, {Shane D.} and George Tzetzis",
year = "2001",
month = "3",
day = "10",
doi = "10.1016/S0268-0033(00)00090-5",
language = "English (US)",
volume = "16",
pages = "213--221",
journal = "Clinical Biomechanics",
issn = "0268-0033",
publisher = "Elsevier Limited",
number = "3",

}

TY - JOUR

T1 - A dynamical systems investigation of lower extremity coordination during running over obstacles

AU - Stergiou, Nicholas

AU - Jensen, Jody L.

AU - Bates, Barry T.

AU - Scholten, Shane D.

AU - Tzetzis, George

PY - 2001/3/10

Y1 - 2001/3/10

N2 - Objective. To investigate intralimb coordination during running over a level surface and over obstacles of three different heights. Design. The phasing relationships between the foot and leg motions in the frontal plane, and the shank and thigh motions in the sagittal plane were used to compare patterns of coordination. Background. The coordinated actions of lower extremity segments are necessary to absorb the impact forces generated during running. The behavioral patterns of these segments can be studied under changing task demands using analysis techniques from the Dynamical Systems Theory. Methods. Ten subjects ran at their self-selected pace under four conditions: over a level surface and over obstacles of different heights (5%, 10%, 15% of their standing height). A force platform was used to record impact forces during landing after obstacle clearance, while kinematics were collected using a two-camera system. Results. The increases in obstacle height resulted in significant changes in impact forces (34% increase between the two extreme conditions) and more in-phase relationships between the segments during early stance. No changes were observed in the variability of the phasing relationships. Conclusions. The coordination changes observed might be compensatory strategies aimed to reduce forces and potential injury. However, since the impact forces still increased significantly, it is also possible that the observed changes might be at-risk movement patterns predisposing runners to injury. Relevance - Tools from the Dynamical Systems Theory, such as intralimb coordination, can be used as a way to evaluate running mechanics so that comparisons can be made to various patient populations in subsequent studies. This approach might be a viable alternative to examine questions in therapeutics.

AB - Objective. To investigate intralimb coordination during running over a level surface and over obstacles of three different heights. Design. The phasing relationships between the foot and leg motions in the frontal plane, and the shank and thigh motions in the sagittal plane were used to compare patterns of coordination. Background. The coordinated actions of lower extremity segments are necessary to absorb the impact forces generated during running. The behavioral patterns of these segments can be studied under changing task demands using analysis techniques from the Dynamical Systems Theory. Methods. Ten subjects ran at their self-selected pace under four conditions: over a level surface and over obstacles of different heights (5%, 10%, 15% of their standing height). A force platform was used to record impact forces during landing after obstacle clearance, while kinematics were collected using a two-camera system. Results. The increases in obstacle height resulted in significant changes in impact forces (34% increase between the two extreme conditions) and more in-phase relationships between the segments during early stance. No changes were observed in the variability of the phasing relationships. Conclusions. The coordination changes observed might be compensatory strategies aimed to reduce forces and potential injury. However, since the impact forces still increased significantly, it is also possible that the observed changes might be at-risk movement patterns predisposing runners to injury. Relevance - Tools from the Dynamical Systems Theory, such as intralimb coordination, can be used as a way to evaluate running mechanics so that comparisons can be made to various patient populations in subsequent studies. This approach might be a viable alternative to examine questions in therapeutics.

KW - Coordination

KW - Dynamical systems

KW - Impact forces

KW - Lower extremity

KW - Obstacle

KW - Running

UR - http://www.scopus.com/inward/record.url?scp=0035116107&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035116107&partnerID=8YFLogxK

U2 - 10.1016/S0268-0033(00)00090-5

DO - 10.1016/S0268-0033(00)00090-5

M3 - Article

C2 - 11240056

AN - SCOPUS:0035116107

VL - 16

SP - 213

EP - 221

JO - Clinical Biomechanics

JF - Clinical Biomechanics

SN - 0268-0033

IS - 3

ER -