title: Ipsilateral patterns of the rotational range of motion of the hip in healthy Japanese adults.
abstract: [Purpose] This study aimed to categorize the internal and external rotation range of motion (ROM) of ipsilateral hip joints into specific patterns based on the differences between them, and clarify the distribution of these patterns. [Subjects and Methods] A total of 222 healthy Japanese medical students (162 males, 60 females) with a mean age of 21.2 ± 4.0 years were enrolled. The ROM of internal and external rotation at the hip were randomly measured with the subjects in the prone position. Thereafter, the difference between internal and external rotations was assessed. Hip ROM patterns were classified into 3 types based on the differences in the rotation ROM on each side. A total of 9 overall patterns were then determined based on the combination of patterns on both sides. [Results] Although all the subjects were healthy, an asymmetrical ROM between internal and external rotation in ipsilateral hip joints could be detected via pattern classification. Moreover, the distribution of each hip ROM pattern was clarified. [Conclusion] Pattern classification based on differences in internal and external rotation ROM could serve as a useful evaluation method for clinical manipulative therapy.
authors: Department of Physical Therapy, School of Health Sciences, International University of Health and Welfare, Japan.
authors: Heonoo
authors: H
authors: Han
authors: Department of Physical Therapy, School of Health Sciences, International University of Health and Welfare, Japan.
authors: Akira
authors: A
authors: Kubo
authors: Department of Physical Therapy, School of Health Sciences at Odawara, International University of Health and Welfare, Japan.
authors: Kazuo
authors: K
authors: Kurosawa
authors: Self-employed Physical Therapist, Japan.
authors: Shizuka
authors: S
authors: Maruichi
authors: Department of Physical Therapy, School of Health Sciences, International University of Health and Welfare, Japan.
authors: Masahiro
authors: M
authors: Ishizaka
authors: Department of Physical Therapy, School of Health Sciences, International University of Health and Welfare, Japan.
authors: Kaori
authors: K
authors: Sadakiyo
authors: Department of Physical Therapy, School of Health Sciences, International University of Health and Welfare, Japan.
authors: Takahiro
authors: T
authors: Nomura
authors: Department of Physical Therapy, School of Health Sciences, International University of Health and Welfare, Japan.
authors: Kaoru
authors: K
authors: Honzawa
keywords: Hip rotation; Pattern; ROM