The effect of back muscle fatigue on EMG and kinematics based estimation of low-back loads and active moments during manual lifting tasks
Copyright © 2023 The Author(s). Published by Elsevier Ltd.. All rights reserved..
This study investigated the effects of back muscle fatigue on the estimation of low-back loads and active low-back moments during lifting, using an EMG and kinematics based model calibrated with data from an unfatigued state. Fourteen participants performed lifting tasks in unfatigued and fatigued states. Fatigue was induced through semi-static forward bending. EMG, kinematics, and ground reaction forces were measured, and low-back loads were estimated using inverse dynamics and EMG-driven muscle model. A regression model was developed using data from a set of calibration lifts, and its accuracy was evaluated for unfatigued and fatigued lifts. During the fatigue-inducing task, the EMG amplitude increased by 2.8 %MVC, representing a 38% increase relative to the initial value. However, during the fatigued lifts, the peak EMG amplitude was found to be 1.6 %MVC higher than that observed during the unfatigued lifts, representing a mere 4% increase relative to the baseline unfatigued peak EMG amplitude. Kinematics and low-back load estimates remained unaffected. Regression model estimation errors remained unaffected for 5 kg lifts, but increased by no more than 5% of the peak active low-back moment for 15 kg lifts. We conclude that the regression-based estimation quality of active low-back moments can be maintained during periods of muscle fatigue, although errors may slightly increase for heavier loads.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:73 |
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| Enthalten in: |
Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology - 73(2023) vom: 12. Dez., Seite 102815 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Tabasi, A [VerfasserIn] |
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| Links: |
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| Themen: |
Back muscle fatigue |
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| Anmerkungen: |
Date Completed 11.12.2023 Date Revised 11.12.2023 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.jelekin.2023.102815 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM361863373 |
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| 500 | |a Date Revised 11.12.2023 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2023 The Author(s). Published by Elsevier Ltd.. All rights reserved. | ||
| 520 | |a This study investigated the effects of back muscle fatigue on the estimation of low-back loads and active low-back moments during lifting, using an EMG and kinematics based model calibrated with data from an unfatigued state. Fourteen participants performed lifting tasks in unfatigued and fatigued states. Fatigue was induced through semi-static forward bending. EMG, kinematics, and ground reaction forces were measured, and low-back loads were estimated using inverse dynamics and EMG-driven muscle model. A regression model was developed using data from a set of calibration lifts, and its accuracy was evaluated for unfatigued and fatigued lifts. During the fatigue-inducing task, the EMG amplitude increased by 2.8 %MVC, representing a 38% increase relative to the initial value. However, during the fatigued lifts, the peak EMG amplitude was found to be 1.6 %MVC higher than that observed during the unfatigued lifts, representing a mere 4% increase relative to the baseline unfatigued peak EMG amplitude. Kinematics and low-back load estimates remained unaffected. Regression model estimation errors remained unaffected for 5 kg lifts, but increased by no more than 5% of the peak active low-back moment for 15 kg lifts. We conclude that the regression-based estimation quality of active low-back moments can be maintained during periods of muscle fatigue, although errors may slightly increase for heavier loads | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Back muscle fatigue | |
| 650 | 4 | |a Exoskeleton control | |
| 650 | 4 | |a Low-back load estimation | |
| 700 | 1 | |a Brouwer, N P |e verfasserin |4 aut | |
| 700 | 1 | |a Kingma, I |e verfasserin |4 aut | |
| 700 | 1 | |a van Dijk, W |e verfasserin |4 aut | |
| 700 | 1 | |a de Looze, M P |e verfasserin |4 aut | |
| 700 | 1 | |a Moya-Esteban, A |e verfasserin |4 aut | |
| 700 | 1 | |a Kooij, H V D |e verfasserin |4 aut | |
| 700 | 1 | |a van Dieën, J H |e verfasserin |4 aut | |
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