787 Impact of Book Bags on Gait Cycle and Posture

Pascoe, Donna E.; Shin, Dong Min; Kim, C. K.; Wang, Y. T.; Pascoe, David D.

doi:10.1249/00005768-199405001-00789

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“…In addition, overall comfort was significantly greater with the difference in load distribution. Previous studies have found that postural deviations in addition to LCS weight may contribute to soreness, back pain, numbness and shoulder pain (Pascoe et al 1994(Pascoe et al , 1997. While it was not the purview of this study to investigate postural changes, the reduced discomfort experienced while wearing the experimental packs may have reflected the claim by the manufacturer that the load distribution of the experimental LCSs can contribute to greater comfort in selected anatomical areas.…”

Section: Discussionmentioning

confidence: 97%

“…Book-bag type LCSs promote significant forward body lean (Pascoe et al 1997) in both the trunk and craniovertebral locations (Grimmer et al 1999). Such postural deviations in addition to LCS weight contribute to symptoms such as soreness 67.3%, back pain 50.8%, numbness 24.5% and shoulder pain 14.7% (Pascoe et al 1994(Pascoe et al , 1997. Symptoms most often appear either when loads are excessive or when the LCS inadequately distributes the weight (Daube 1969, Bessen et al 1987, Troussier et al 1994, Negrini et al 1998).…”

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confidence: 99%

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Comparison of perceived comfort differences between standard and experimental load carriage systems

et al. 2003

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The current popularity of backpack-type load carriage systems (LCS) by students has precipitated a prevalence of postural abnormalities and pain. This study compared subjective perceptual comfort in standard and vertically loaded LCSs. Sixteen females ages 18-23 years rated their personal LCSs for perceived shoulder, neck, and lower back comfort and for overall comfort, each day for two weeks using 100 mm visual analogue scales (VAS). Each scale contained polar extremities of 'very comfortable' to 'very uncomfortable' and a vertical mark placed on the 100 mm line by the participants indicated their perception of comfort. Following two weeks, participants were given LCSs that distributed the weight vertically and were asked to rate the system in the same way for an additional two-week period. Statistical analysis revealed significant differences in shoulder (p=0.015), neck (p=0.005), and lower back (p=0.036) comfort and overall comfort (p=0.001) between the participants' personal LCSs and the experimental LCS. In conclusion, vertical load placement may redistribute the load in a manner that reduces symptoms of selected anatomical discomfort.

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Section: Discussionmentioning

confidence: 97%