Gender-based differences in postural responses to seated exposures

Dunk, Nadine M.; Callaghan, Jack P.

doi:10.1016/j.clinbiomech.2005.07.004

Cited by 158 publications

(109 citation statements)

References 29 publications

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“…It has been reported that there are gender differences in loading patterns and pain generating pathways when considering the mechanical mechanisms of reducing the risk of injury as well [31]. Therefore, gender-dependent strategies should be considered to reduce the risk of injury or aggravation of an existing injury [32].…”

Section: Discussionmentioning

confidence: 99%

Factors affecting shoulder–pelvic integration during axial trunk rotation in subjects with recurrent low back pain

et al. 2012

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Introduction Shoulder-pelvic integration could play a central role in the control of dynamic posture and movement. However, kinematic coordination during axial trunk rotation has not been carefully investigated in subjects with recurrent low back pain (LBP). The purpose of this study was to compare the maximum rotational angles of the shoulders and pelvis in the transverse plane between subjects with and without recurrent LBP. Materials and methods A total of 38 age-matched subjects (19 control subjects: 69.00 ± 5.75 years old and 19 subjects with LBP: 68.79 ± 5.40 years old) participated in the study. The axial trunk rotation test was conducted in the upright position with bilateral hips and knees fully extended and both feet shoulder width apart. Results The results of this study indicated that there was a difference in pelvic girdle rotation between groups (100.79 ± 26.46 in the control group, 82.12 ± 23.16 in the LBP group; t = 2.31, p = 0.02); however, there was no difference for the shoulder girdle (177.63 ± 36.98 in the control group, 156.42 ± 30.09 in the LBP group; t = 1.91, p = 0.06). There were interactions with age (F = 9.27, p = 0.004) and BMI (F = 7.50, p = 0.01) with the rotational angles of the shoulder and pelvis. Conclusion These results indicated a different pattern of trunk rotation movement with the age and BMI serving as important factors to consider for recurrent LBP. The results of our study also indicated a different pattern of shoulder and pelvic coordination with age and gender. Clinicians need to consider the consequences of limited shoulderpelvic rotational angles, especially limited rotational angle on the pelvis during trunk axial rotation. Further studies are required to determine the causes of the underlying problems for clinical decision-making and altered shoulderpelvic rotation in subjects with recurrent LBP.

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Section: Discussionmentioning

confidence: 99%

Factors affecting shoulder–pelvic integration during axial trunk rotation in subjects with recurrent low back pain

et al. 2012

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“…Previous studies have found that males and females adopt different postures during seated computer work (Dunk & Callaghan, 2005;Straker et al, 2009b). It is expected that postural differences will also exist when using a laptop away from a desk, and in the experiment it was hypothesized that females are more likely than males to adopt risky postures while using a laptop in each of the three configurations when lying or sitting on a bed.…”

Section: Current Directionmentioning

confidence: 93%

“…However, Bernard et al (1994) cautioned that this might be due to gender differences in the tasks performed by participants in their sample. Despite this qualification, males and females tend to adopt slightly different postures when performing seated computer work, which may affect their degree of comfort or discomfort (Dunk & Callaghan, 2005;Straker et al, 2009b). Regardless of the chair used or task performed, males tend to exhibit greater trunk and lumber flexion, as well as greater posterior pelvic rotation than their female counterparts, who actually tend to show anterior pelvic rotation.…”

Section: Current Directionmentioning

confidence: 99%

Postural Risks Associated with Laptop Use on a Bed

Bubric

2014

Proceedings of the Human Factors and Ergonomics Society Annual

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This study consists of a survey and experiment to identify the postural risks associated with laptop use in non-traditional work settings. The survey gauged the prevalence of musculoskeletal discomfort among 186 college students, and also identified the configurations in which male and female students most frequently use laptop computers. Previous work suggests that females report a higher prevalence of musculoskeletal discomfort associated with laptop use than males, and the results of the survey confirmed this, but only for neck and shoulder discomfort. Differences in how males and females reported working were also revealed, with females more likely to use a laptop positioned on the lap and also while sitting with their legs crossed. Males, on the other hand, were more likely to report using a laptop while sitting in positions that required large trunk deviations, such as bending over a coffee table or to the side.The experiment, which was based on the survey findings, explored the reasons why females reported experiencing more frequent neck and shoulder discomfort when using a laptop than did males. It was hypothesized that this was because females use laptop computers more frequently in deviated postures. Three configurations that females reported working in more frequently than males in the survey were selected for testing, each within the context of a bed/mattress. Postural analysis and discomfort data was collected for 36 participants (18 males, 18 females) performing a 25-minute typing task in each of the three conditions to determine whether these configurations placed the participants in highly deviated postures. Gender comparisons of postural deviation and self-reported discomfort ratings after completion of a typing task in each position were made.Both male and female participants reported very low levels of discomfort in each of the three conditions, and there was no significant gender difference. Participants displayed highly deviated postures, particularly in the neck, shoulders, and wrists, in all three conditions and there were few gender differences. Any gender differences that were discovered were not consistently in favor of one gender. Males had a slight tendency to work in more deviated postures than females, however both genders were in undesirable postures for much of the experiment.It is most likely that any increased prevalence of musculoskeletal discomfort in females compared to males is due to their choice of working configuration, rather than inherent differences in posture. However, there are a number of other factors that may account for any gender differences in musculoskeletal discomfort, including the finding that females report spending more hours per week using a computer. Further study to identify the contribution of each factor, both in males and females, would be valuable in order to understand the impact that working configuration has on musculoskeletal discomfort and injury i BIOGRAPHICAL SKETCH Katherine Bubric was born in Calgary, Alberta, where she received a ...

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“…In-car activities are further divisible into driving and nondriving activities. Onset of low back pain or discomfort has previously been identified for occupational driving activities in general [2,13], as well as for the flexed lumbar postures associated with such activities [14,15]. The level of this discomfort is directly related to the amount of occupational driving exposure [13].…”

Section: Discussionmentioning

confidence: 99%