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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Knee Rotation in Relation to Laterality, Sex, Applied Torque, and Knee Angle
Author(s)
Seiya Masegi1, Hitoshi Shiraki2 and Shumpei Miyakawa2
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DOI:10.17265/2332-7839/2018.03.011
Affiliation(s)
1. Department of Health and Sports, Faculty of Health Sciences, Niigata University of Health and Welfare, Niigata 950-3198, Japan
2. Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
ABSTRACT
Rotational knee laxity is known as an intrinsic risk factor for anterior
cruciate ligament injury. However, there was no convenient way to measure
rotational range of motion. To this end, we developed the RotorMeter, a
non-invasive external device intended to measure rotational range of motion of
the knee. The purpose of this study is to use the
RotorMeter to clarify the characteristics pertaining to the rotational range of
motion of knee in healthy participants under varying conditions. A total of 23
healthy participants participated in the study. Torques of 2.5, 5.0, and 7.5 Nm
were applied at 90°, 60°, and 30° angles of knee flexion to measure the
rotational range of motion of knee using the RoterMeter. Female participants
showed larger rotational range of motion than the males, and no laterality was
observed at any flexion angle and applied torque. When different torques were
applied at the same flexion angle, rotational range of motion significantly
increased at all flexion angles with increased torque. When the same torque was
applied at different flexion angles, no significant difference in rotational
range of motion was observed at any of the flexion angles.
KEYWORDS
Knee, rotation, RotorMeter.
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