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Effects of leg fatigue due to exhaustive stair climbing on gait biomechanics while walking up a 10˚ incline – implications for evacuation and work safety

Halder, Amitava LU ; Nordin, Axel LU ; Miller, Michael LU ; Kuklane, Kalev LU ; Nirme, Jens LU and Gao, Chuansi LU (2021) In Fire Safety Journal
Abstract
This biomechanics study explored stride length (SL), duration (SDN), and gait ground reaction forces (GRFspeak), required coefficient of friction (RCOFpeak), joint angle (anglepeak, anglemin), angular velocities (angvelx peak), angular accelerations (angaccx peak), muscle electromyography (EMG) during the dominant leg stance phase (SP) following an exhaustive stair ascent for evacuation. Data were collected by a three-dimensional motion capture system synchronized with EMG and force plate when walking upwards on a 10° inclined walkway.The significantly (p≤0.05) decreased EMG median frequencies of tibialis anterior during early (ES) and late stance (LS) phases, and vastus lateralis muscles during LS are the evidence of leg local muscle... (More)
This biomechanics study explored stride length (SL), duration (SDN), and gait ground reaction forces (GRFspeak), required coefficient of friction (RCOFpeak), joint angle (anglepeak, anglemin), angular velocities (angvelx peak), angular accelerations (angaccx peak), muscle electromyography (EMG) during the dominant leg stance phase (SP) following an exhaustive stair ascent for evacuation. Data were collected by a three-dimensional motion capture system synchronized with EMG and force plate when walking upwards on a 10° inclined walkway.The significantly (p≤0.05) decreased EMG median frequencies of tibialis anterior during early (ES) and late stance (LS) phases, and vastus lateralis muscles during LS are the evidence of leg local muscle fatigue (LMF). The perpendicular and longitudinal shear GRFspeaks were significantly reduced during ES (p≤0.05) and LS (p≤0.01), respectively. The post-fatigue SP, SL, and SDN were significantly (p<0.05) shorter. Specially, the foot anglemins, ankle anglepeaks, and relevant angvelx peaks, and angaccx peaks significantly (p≤0.05) decreased in post-fatigue trials. The post-fatigue RCOFpeaks were found significantly (p≤0.01) lower during LS phase. Thus, whole body exhaustion and leg LMF constrained the gait kinetics and kinematics when walking upwards indicating a cautious gait associated with the risks of falls, accidents, which can hinder the process of evacuation and work safety on slopes. (Less)
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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Whole body exhaustion, Localized muscle fatigue, Human locomotion, Accidents and injuries, Incline walking gait biomechanics, Required coefficient of friction, Kinetics, Kinematics, Ground Reaction force, Electromyography
in
Fire Safety Journal
publisher
Elsevier
external identifiers
  • scopus:85105787672
ISSN
0379-7112
DOI
10.1016/j.firesaf.2021.103342
project
Physical work capacity and biomechanical aspects as limiting factors in challenging environments
language
English
LU publication?
yes
id
b1bc1b25-74b5-4df1-b253-132f1e418732
date added to LUP
2021-04-17 19:33:14
date last changed
2023-09-12 18:26:14
@article{b1bc1b25-74b5-4df1-b253-132f1e418732,
  abstract     = {{This biomechanics study explored stride length (SL), duration (SDN), and gait ground reaction forces (GRFspeak), required coefficient of friction (RCOFpeak), joint angle (anglepeak, anglemin), angular velocities (angvelx peak), angular accelerations (angaccx peak), muscle electromyography (EMG) during the dominant leg stance phase (SP) following an exhaustive stair ascent for evacuation. Data were collected by a three-dimensional motion capture system synchronized with EMG and force plate when walking upwards on a 10° inclined walkway.The significantly (p≤0.05) decreased EMG median frequencies of tibialis anterior during early (ES) and late stance (LS) phases, and vastus lateralis muscles during LS are the evidence of leg local muscle fatigue (LMF). The perpendicular and longitudinal shear GRFspeaks were significantly reduced during ES (p≤0.05) and LS (p≤0.01), respectively. The post-fatigue SP, SL, and SDN were significantly (p&lt;0.05) shorter. Specially, the foot anglemins, ankle anglepeaks, and relevant angvelx peaks, and angaccx peaks significantly (p≤0.05) decreased in post-fatigue trials. The post-fatigue RCOFpeaks were found significantly (p≤0.01) lower during LS phase. Thus, whole body exhaustion and leg LMF constrained the gait kinetics and kinematics when walking upwards indicating a cautious gait associated with the risks of falls, accidents, which can hinder the process of evacuation and work safety on slopes.}},
  author       = {{Halder, Amitava and Nordin, Axel and Miller, Michael and Kuklane, Kalev and Nirme, Jens and Gao, Chuansi}},
  issn         = {{0379-7112}},
  keywords     = {{Whole body exhaustion; Localized muscle fatigue; Human locomotion; Accidents and injuries; Incline walking gait biomechanics; Required coefficient of friction; Kinetics; Kinematics; Ground Reaction force; Electromyography}},
  language     = {{eng}},
  month        = {{04}},
  publisher    = {{Elsevier}},
  series       = {{Fire Safety Journal}},
  title        = {{Effects of leg fatigue due to exhaustive stair climbing on gait biomechanics while walking up a 10˚ incline – implications for evacuation and work safety}},
  url          = {{http://dx.doi.org/10.1016/j.firesaf.2021.103342}},
  doi          = {{10.1016/j.firesaf.2021.103342}},
  year         = {{2021}},
}