The relationships between lumbar curves, pelvic tilt and joint mobilities in different sitting postures in young adult males.

Akira Yasukouchi, T. Isayama

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The lumbar lordosis and pelvic tilt of twenty male subjects were measured in standing and in three different sitting postures with the trunk-thigh angles of 120 (sitting A), 90 (sitting B), and 60 (sitting C) degs and the knee angle was constant at 90 deg. Ten more male subjects participated in the supplemental study, in which additional condition of the knee angle was employed in postures of the trunk-thigh angles of 90 and 60 degs. Some joint mobilities were also measured to investigate the relations of the mobilities to lumbar lordosis and pelvic tilt. The lumbar curve decreased and the pelvis rotated rearward significantly as the trunk-thigh angle and the knee flexion decreased. The great alteration of the lumbar curve was observed between standing and sitting A, which was much different from the results of Keegan (1953) studied in the subjects of lateral recumbent position. There was a high correlation coefficient between the lumbar curve and the pelvic tilt (r = 0.909), so that the relations of the pelvic tilt to the joint mobilities were investigated. When the knee angle was constant, the pelvic tilt is related significantly to the hamstrings between standing and sitting A and to the gluteus maximus between sitting A and sitting C. However, at different sitting postures with the trunk-thigh angles of 90 and 60 degs involving different knee flexions, hamstrings added to gluteal muscles affected significantly lumbar curve and pelvic tilting.(ABSTRACT TRUNCATED AT 250 WORDS)

Original languageEnglish
Pages (from-to)15-21
Number of pages7
JournalApplied human science : journal of physiological anthropology
Volume14
Issue number1
DOIs
Publication statusPublished - Jan 1 1995

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Posture
young adult
Muscle
Young Adult
Knee
Thigh
Joints
Lordosis
Pelvis
Muscles

All Science Journal Classification (ASJC) codes

  • Medicine(all)

Cite this

The relationships between lumbar curves, pelvic tilt and joint mobilities in different sitting postures in young adult males. / Yasukouchi, Akira; Isayama, T.

In: Applied human science : journal of physiological anthropology, Vol. 14, No. 1, 01.01.1995, p. 15-21.

Research output: Contribution to journalArticle

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