Effects of backpack load on critical changes of trunk muscle activation and lumbar spine loading during walking

Simon S. W. LI, Hung Kay Daniel CHOW

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This study investigated the effects of carrying a backpack while walking. Critical changes featuring the disproportionality of increases in trunk muscle activation and lumbar joint loading between light and heavy backpack carriage weight may reveal the load-bearing strategy of the lumbar spine. This was investigated using an integrated system equipped with a motion analysis, a force platform and a wireless surface electromyography (EMG) system to measure the trunk muscle EMG amplitudes and lumbar joint component forces. A predictive goal programming model was developed to determine the most critical changes in trunk muscle activation and lumbar joint loading. Results suggested that lightweight backpack carriage at approximately 3% of body weight (BW) might reduce the peak lumbosacral compression force by 3% during walking compared with no load condition. The most critical changes in both trunk muscle activation and lumbosacral joint loading were found at a backpack load of 10% of BW. Copyright © 2017 Informa UK Limited, trading as Taylor & Francis Group.
Original languageEnglish
Pages (from-to)553-565
JournalErgonomics
Volume61
Issue number4
Early online dateAug 2017
DOIs
Publication statusPublished - 2018

Fingerprint

activation
Walking
Muscle
Spine
Joints
Chemical activation
body weight
Electromyography
Muscles
Bearings (structural)
integrated system
Body Weight
Weight-Bearing
programming
Light
Weights and Measures
Group

Citation

Li, S. S. W., & Chow, D. H. K. (2018). Effects of backpack load on critical changes of trunk muscle activation and lumbar spine loading during walking. Ergonomics, 61(4), 553-565. doi: 10.1080/00140139.2017.1365950

Keywords

  • Trunk muscle activation
  • Lumbar joint loading
  • Backpack carriage
  • Goal programming
  • Load-bearing strategy