title: Validity and reliability of isometric muscle strength measurements of hip abduction and abduction with external hip rotation in a bent-hip position using a handheld dynamometer with a belt.
abstract: [Purpose] This study aimed to investigate the relatedness, reliability, and validity of isometric muscle strength measurements of hip abduction and abduction with an external hip rotation in a bent-hip position using a handheld dynamometer with a belt. [Subjects and Methods] Twenty healthy young adults, with a mean age of 21.5 ± 0.6 years were included. Isometric hip muscle strength in the subjects' right legs was measured under two posture positions using two devices: a handheld dynamometer with a belt and an isokinetic dynamometer. Reliability was evaluated using an intra-class correlation coefficient (ICC); relatedness and validity were evaluated using Pearson's product moment correlation coefficient. Differences in measurements of devices were assessed by two-way ANOVA. [Results] ICC (1, 1) was ≥0.9; significant positive correlations in measurements were found between the two devices under both conditions. No main effect was found between the measurement values. [Conclusion] Our findings revealed that there was relatedness, reliability, and validity of this method for isometric muscle strength measurements using a handheld dynamometer with a belt.
authors: Department of Physical Therapy, Faculty of Health Sciences, Ryotokuji University, Japan.
authors: Hidefumi
authors: H
authors: Aramaki
authors: Department of Physical Therapy, Faculty of Health Sciences, Ryotokuji University, Japan.
authors: Munenori
authors: M
authors: Katoh
authors: Department of Physical Therapy, Faculty of Health Sciences, Ryotokuji University, Japan.
authors: Yukinobu
authors: Y
authors: Hiiragi
authors: Department of Physical Therapy, Faculty of Health Sciences, Ryotokuji University, Japan.
authors: Tsubasa
authors: T
authors: Kawasaki
authors: Department of Rehabilitation, Nippon Koukan Hospital, Japan.
authors: Tomohisa
authors: T
authors: Kurihara
authors: Department of Rehabilitation, Nippon Koukan Hospital, Japan.
authors: Yorikatsu
authors: Y
authors: Ohmi
keywords: Handheld dynamometer with a belt; Isometric muscle strength measurements; Validity and reliability