Excessive contact force is believed to contribute to the development of medial compartment knee osteoarthritis. The external knee adduction moment (KAM) has been identified as a surrogate measure for medial contact force during gait, with an abnormally large peak value being linked to increased pain and rate of disease progression. This study used in vivo gait data collected from a subject with...

This study examined the effects of joint angle and passive movement direction on corticospinal excitability. The subjects were 14 healthy adults from whom consent could be obtained. We performed two experiments. In Experiment 1, we measured motor evoked potential (MEP) amplitude, F-wave and M-wave at 0° and 20° adduction during adduction or abduction movement, in the range of movement from 10° ...

Understanding joint kinetics during activities of daily living furthers our understanding of the factors involved in joint pathology and the effects of treatment. In this study, we examined hip and knee joint kinetics during stair climbing in 35 young healthy subjects using a subject-specific knee model to estimate bone-on-bone tibiofemoral and patello-femoral joint contact forces. The net knee...

Detailed knowledge about loading of the knee joint is essential for preclinical testing of implants, validation of musculoskeletal models and biomechanical understanding of the knee joint. The contact forces and moments acting on the tibial component were therefore measured in 5 subjects in vivo by an instrumented knee implant during various activities of daily living. Average peak resultant fo...

Osteoarthritis (OA) is a chronic disorder resulting in degenerative changes to the knee joint. Three-dimensional gait analysis provides a unique method of measuring knee dynamics during activities of daily living such as walking. The purpose of this study was to identify biomechanical features characterizing the gait of patients with mild-to-moderate knee OA and to determine if the biomechanica...

[Purpose] The purpose of this study was to provide data for decision making regarding the optimal and maximal hip adduction loads for clinical and fitness purposes, respectively. [Subjects] Forty-eight (24 males, 24 females) asymptomatic adults participated in this study. [Methods] Subjects performed optimal and maximal hip adduction loads. Regarding the gender, body weight and height variables...

[Purpose] The purpose of this study was to compare the changes in isolation ratios of the trunk muscles during hip adduction. [Subjects and Methods] In total, 15 males aged 27-35 years were recruited for the present study. Electromyography data of the external oblique, internal oblique, and erector spinae muscles were collected during hip adduction exercise. [Results] With respect to the intern...