The effects of different carrying methods on locomotion stability, gait spatio-temporal parameters and spinal stresses

Mohammed Alamoudi, Francesco Travascio, Arzu Onar-Thomas, Moataz Mohamed Eltoukhy, Shihab S Asfour

Research output: Contribution to journalArticle

Abstract

Manual material handling (MMH) contributes to a large percentage of musculoskeletal disorders. One of its fundamental activities is load carrying that can be accomplished in several strategies, with each one imposing different types of stresses on the musculoskeletal system. Therefore, the first goal of this study was to determine the effect of different carrying methods on walking stability using motion capture analysis. Second, to analyze gait adaptations to stresses associated with load carrying in order to prevent falling. Third, to investigate the effect of these stresses coupled with human body adjustment on the forces at the L5/S1 disc. Thirty participants carried 10 and 30 lbs loads via frontal, lateral, bilateral, and posterior carriages. Frontal and lateral methods generated the most unstable conditions compared to the others. The unstable locomotion forced the gait parameters to be significantly altered in order to maintain stability. Additionally, the postures maintained in these conditions resulted in significantly high compression and shear forces acting at the L5/S1 disc when compared to the other carrying methods. Moreover, heavier weights exacerbated the effect on the dependent variables. Notably, bilateral and posterior carrying methods provided results comparable to the unloaded walking baseline. In conclusion, to reduce the potential risks associated with load carrying, the recommendation to split the load between both hands using bilateral carrying method or carrying it posteriorly should be taken into account while designing MMH activities.

Original languageEnglish (US)
Pages (from-to)81-88
Number of pages8
JournalInternational Journal of Industrial Ergonomics
Volume67
DOIs
StatePublished - Sep 1 2018

Fingerprint

Locomotion
Gait
Materials handling
Musculoskeletal system
Walking
Loads (forces)
Musculoskeletal System
Posture
Human Body
Hand
Weights and Measures

Keywords

  • Gait biomechanics
  • Load carrying
  • Locomotion stability
  • Spinal stress

ASJC Scopus subject areas

  • Human Factors and Ergonomics
  • Public Health, Environmental and Occupational Health

Cite this

@article{42673952000e476580b2175ad75cf820,
title = "The effects of different carrying methods on locomotion stability, gait spatio-temporal parameters and spinal stresses",
abstract = "Manual material handling (MMH) contributes to a large percentage of musculoskeletal disorders. One of its fundamental activities is load carrying that can be accomplished in several strategies, with each one imposing different types of stresses on the musculoskeletal system. Therefore, the first goal of this study was to determine the effect of different carrying methods on walking stability using motion capture analysis. Second, to analyze gait adaptations to stresses associated with load carrying in order to prevent falling. Third, to investigate the effect of these stresses coupled with human body adjustment on the forces at the L5/S1 disc. Thirty participants carried 10 and 30 lbs loads via frontal, lateral, bilateral, and posterior carriages. Frontal and lateral methods generated the most unstable conditions compared to the others. The unstable locomotion forced the gait parameters to be significantly altered in order to maintain stability. Additionally, the postures maintained in these conditions resulted in significantly high compression and shear forces acting at the L5/S1 disc when compared to the other carrying methods. Moreover, heavier weights exacerbated the effect on the dependent variables. Notably, bilateral and posterior carrying methods provided results comparable to the unloaded walking baseline. In conclusion, to reduce the potential risks associated with load carrying, the recommendation to split the load between both hands using bilateral carrying method or carrying it posteriorly should be taken into account while designing MMH activities.",
keywords = "Gait biomechanics, Load carrying, Locomotion stability, Spinal stress",
author = "Mohammed Alamoudi and Francesco Travascio and Arzu Onar-Thomas and Eltoukhy, {Moataz Mohamed} and Asfour, {Shihab S}",
year = "2018",
month = "9",
day = "1",
doi = "10.1016/j.ergon.2018.04.012",
language = "English (US)",
volume = "67",
pages = "81--88",
journal = "International Journal of Industrial Ergonomics",
issn = "0169-8141",
publisher = "Elsevier",

}

TY - JOUR

T1 - The effects of different carrying methods on locomotion stability, gait spatio-temporal parameters and spinal stresses

AU - Alamoudi, Mohammed

AU - Travascio, Francesco

AU - Onar-Thomas, Arzu

AU - Eltoukhy, Moataz Mohamed

AU - Asfour, Shihab S

PY - 2018/9/1

Y1 - 2018/9/1

N2 - Manual material handling (MMH) contributes to a large percentage of musculoskeletal disorders. One of its fundamental activities is load carrying that can be accomplished in several strategies, with each one imposing different types of stresses on the musculoskeletal system. Therefore, the first goal of this study was to determine the effect of different carrying methods on walking stability using motion capture analysis. Second, to analyze gait adaptations to stresses associated with load carrying in order to prevent falling. Third, to investigate the effect of these stresses coupled with human body adjustment on the forces at the L5/S1 disc. Thirty participants carried 10 and 30 lbs loads via frontal, lateral, bilateral, and posterior carriages. Frontal and lateral methods generated the most unstable conditions compared to the others. The unstable locomotion forced the gait parameters to be significantly altered in order to maintain stability. Additionally, the postures maintained in these conditions resulted in significantly high compression and shear forces acting at the L5/S1 disc when compared to the other carrying methods. Moreover, heavier weights exacerbated the effect on the dependent variables. Notably, bilateral and posterior carrying methods provided results comparable to the unloaded walking baseline. In conclusion, to reduce the potential risks associated with load carrying, the recommendation to split the load between both hands using bilateral carrying method or carrying it posteriorly should be taken into account while designing MMH activities.

AB - Manual material handling (MMH) contributes to a large percentage of musculoskeletal disorders. One of its fundamental activities is load carrying that can be accomplished in several strategies, with each one imposing different types of stresses on the musculoskeletal system. Therefore, the first goal of this study was to determine the effect of different carrying methods on walking stability using motion capture analysis. Second, to analyze gait adaptations to stresses associated with load carrying in order to prevent falling. Third, to investigate the effect of these stresses coupled with human body adjustment on the forces at the L5/S1 disc. Thirty participants carried 10 and 30 lbs loads via frontal, lateral, bilateral, and posterior carriages. Frontal and lateral methods generated the most unstable conditions compared to the others. The unstable locomotion forced the gait parameters to be significantly altered in order to maintain stability. Additionally, the postures maintained in these conditions resulted in significantly high compression and shear forces acting at the L5/S1 disc when compared to the other carrying methods. Moreover, heavier weights exacerbated the effect on the dependent variables. Notably, bilateral and posterior carrying methods provided results comparable to the unloaded walking baseline. In conclusion, to reduce the potential risks associated with load carrying, the recommendation to split the load between both hands using bilateral carrying method or carrying it posteriorly should be taken into account while designing MMH activities.

KW - Gait biomechanics

KW - Load carrying

KW - Locomotion stability

KW - Spinal stress

UR - http://www.scopus.com/inward/record.url?scp=85047078468&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85047078468&partnerID=8YFLogxK

U2 - 10.1016/j.ergon.2018.04.012

DO - 10.1016/j.ergon.2018.04.012

M3 - Article

AN - SCOPUS:85047078468

VL - 67

SP - 81

EP - 88

JO - International Journal of Industrial Ergonomics

JF - International Journal of Industrial Ergonomics

SN - 0169-8141

ER -