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Does load position affect gait and subjective responses of females during load carriage?

Journal Article


Abstract


  • Recreational hikers carry heavy loads while often walking long distances over uneven terrain. Previous

    studies have suggested that not only the load mass but also the position of the load may influence load

    carriage. The purpose of this study was to determine the effect of vertical load position on gait and

    subjective responses of female recreational hikers. Fifteen experienced female hikers walked for 2 km

    over a simulated hiking trail carrying 30% BW in three vertical load positions (high, medium and low).

    Lower limb and trunk kinematic, electromyography (EMG) and ground reaction force (GRF) data were

    collected together with heart rate (HR), ratings of perceived exertion (RPE) and discomfort measures.

    Although HR, RPE and discomfort measures were not able to discern statistical differences between load

    positions, the high load position was the most preferred by participants. The high load position also

    resulted in a more upright posture (p < 0.001), decreased gastrocnemius integrated EMG compared to

    the medium (p ¼ 0.005) and low load positions (p ¼ 0.02) and a higher first peak deceleration vertical

    GRF compared to the low load position (p ¼ 0.011). However, the absolute differences were small and

    unlikely to be functionally relevant in load carriage studies. Based on the findings of this study, a high,

    medium or low load position cannot be preferentially recommended for healthy, experienced, female

    hikers carrying 30% BW.

Authors


  •   Simpson, Katrina (external author)
  •   Munro, Bridget J. (external author)
  •   Steele, Julie R.

Publication Date


  • 2012

Citation


  • Simpson, K. M., Munro, B. J. & Steele, J. R. (2012). Does load position affect gait and subjective responses of females during load carriage?. Applied Ergonomics: human factors in technology and society, 43 (3), 479-485.

Scopus Eid


  • 2-s2.0-84855903744

Ro Metadata Url


  • http://ro.uow.edu.au/hbspapers/2798

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 479

End Page


  • 485

Volume


  • 43

Issue


  • 3

Place Of Publication


  • United Kingdom

Abstract


  • Recreational hikers carry heavy loads while often walking long distances over uneven terrain. Previous

    studies have suggested that not only the load mass but also the position of the load may influence load

    carriage. The purpose of this study was to determine the effect of vertical load position on gait and

    subjective responses of female recreational hikers. Fifteen experienced female hikers walked for 2 km

    over a simulated hiking trail carrying 30% BW in three vertical load positions (high, medium and low).

    Lower limb and trunk kinematic, electromyography (EMG) and ground reaction force (GRF) data were

    collected together with heart rate (HR), ratings of perceived exertion (RPE) and discomfort measures.

    Although HR, RPE and discomfort measures were not able to discern statistical differences between load

    positions, the high load position was the most preferred by participants. The high load position also

    resulted in a more upright posture (p < 0.001), decreased gastrocnemius integrated EMG compared to

    the medium (p ¼ 0.005) and low load positions (p ¼ 0.02) and a higher first peak deceleration vertical

    GRF compared to the low load position (p ¼ 0.011). However, the absolute differences were small and

    unlikely to be functionally relevant in load carriage studies. Based on the findings of this study, a high,

    medium or low load position cannot be preferentially recommended for healthy, experienced, female

    hikers carrying 30% BW.

Authors


  •   Simpson, Katrina (external author)
  •   Munro, Bridget J. (external author)
  •   Steele, Julie R.

Publication Date


  • 2012

Citation


  • Simpson, K. M., Munro, B. J. & Steele, J. R. (2012). Does load position affect gait and subjective responses of females during load carriage?. Applied Ergonomics: human factors in technology and society, 43 (3), 479-485.

Scopus Eid


  • 2-s2.0-84855903744

Ro Metadata Url


  • http://ro.uow.edu.au/hbspapers/2798

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 479

End Page


  • 485

Volume


  • 43

Issue


  • 3

Place Of Publication


  • United Kingdom