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. 2021 Oct 4;11(1):19676.
doi: 10.1038/s41598-021-99232-w.

Changes in external ischial tuberosity width at varying trunk-thigh angles between sexes using two measurement methods

Yi-Lang Chen  1
Affiliations

Changes in external ischial tuberosity width at varying trunk-thigh angles between sexes using two measurement methods

Yi-Lang Chen. Sci Rep. .

Abstract

This study examined the influence of two methods and various trunk-thigh (TT) angles on external ischial tuberosity width (EITW) for 45 men and 45 women. In the experiment, the impress and seat pressure methods were applied at TT angles of 60°, 75°, 90°, and 105°. When the impress method was used, EITW remained highly consistent across the four measured TT angles with differences of 2.8 and 2.1 mm for men and women, respectively. Conversely, in the seated pressure method, EITW increased with TT angle such that differences in EITW across a full TT angle range were 11.5 and 11.7 mm for men and women, respectively. Irrespective of method, differences in EITW between genders measured approximately 12.6-13.7 mm across all TT angles. Correlation analyses revealed that hip circumference was positively related to EITW in all cases, whereas the relationship of hip width and depth with EITW varied by method and gender. Because of inherent differences in EITW between genders, these findings suggest that gender variability should be considered in seat cushion design.

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Conflict of interest statement

The author declares no competing interests.

Figures

Figure 1
Figure 1
Schematic of the external ischial tuberosity width (EITW).
Figure 2
Figure 2
External ischial tuberosity width (EITW) estimation in the seated pressure method (a) and the complete EITW imprint in clay in the impress method (b).
Figure 3
Figure 3
Four varying trunk–thigh angles adopted in the study.
Figure 4
Figure 4
Comparisons of external ischial tuberosity width values under different testing conditions.
See this image and copyright information in PMC

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References

    1. Bontrup C, et al. Low back pain and its relationship with sitting behaviour among sedentary office workers. Appl. Ergonom. 2019;81:102894. doi: 10.1016/j.apergo.2019.102894. - DOI - PubMed
    1. Hanna F, Daas RN, El-Shareif TJ, Al-Marridi HH, Al-Rojoub ZM, Adegboye OA. The relationship between sedentary behavior, back pain, and psychosocial correlates among university employees. Front. Public Health. 2019;7:80. doi: 10.3389/fpubh.2019.00080. - DOI - PMC - PubMed
    1. Castellucci HI, Viviani C, Arezes P, Molenbroek JF, Martínez M, Aparici V. Application of mismatch equations in dynamic seating designs. Appl. Ergonom. 2012;90:103273. doi: 10.1016/j.apergo.2020.103273. - DOI - PubMed
    1. Kuster RP, Bauer CM, Baumgartner D. Is active sitting on a dynamic office chair controlled by the trunk muscles? PLOS ONE. 2020;15(11):e0242854. doi: 10.1371/journal.pone.0242854. - DOI - PMC - PubMed
    1. Rincón O, Bernal ML, Salazar JJ, Zea CR. Relationship between seat surface shape and pressure distribution in school seat models. Work. 2020;66:161–171. doi: 10.3233/WOR-203160. - DOI - PubMed

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