Combining isometric knee extension exercises with hip adduction or abduction does not increase quadriceps EMG activity

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Combining isometric knee extension exercises with hip adduction or abduction does not increase quadriceps EMG activity.

OBJECTIVE To determine if the combined isometric contractions of knee extension/hip adduction and knee extension/hip abduction will elicit a different quadriceps and gluteus medius electromyographic (EMG) pattern as compared to isometric contraction of a uniplanar knee extension exercise. METHODS Eight healthy young adult volunteers without history of knee or quadriceps injury participated. S...

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Hip-abduction, knee-extension orthosis.

T he Hip-Abduction, KneeExtension Orthosis (HA, KE) is designed to aid in preventing or correcting deformities in spastic hip abductor and hamstring muscles when stretching and exercise do not suffice. Spasticity in this group of muscles is not uncommon in paraplegia or in other selected diseases of the central nervous system-for example, in multiple sclerosis. The orthosis consists of bila ter...

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Greater Hip Extension but Not Hip Abduction Explosive Strength Is Associated With Lesser Hip Adduction and Knee Valgus Motion During a Single-Leg Jump-Cut.

BACKGROUND The relationships between hip abductor and extensor strength and frontal plane hip and knee motions that are associated with anterior cruciate ligament injury risk are equivocal. However, previous research on these relationships has evaluated relatively low-level movement tasks and peak torque rather than a time-critical strength measure such as the rate of torque development (RTD). ...

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Hip Muscle Activity during Isometric Contraction of Hip Abduction

[Purpose] This study aimed to determine the effect of varying hip flexion angle on hip muscle activity during isometric contraction in abduction. [Subjects] Twenty-seven healthy men (mean age=21.5 years, SD=1.2) participated in this study. [Methods] Surface electromyography (EMG) was recorded of the upper portion of the gluteus maximus (UGM), lower portion of the gluteus maximus (LGM), tensor f...

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Effects of isometric hip movements on electromyographic activities of the trunk muscles during plank exercises

[Purpose] The purpose of this study was to investigate the effect of isometric hip adduction and abduction on trunk muscle activity during plank exercises. [Subjects and Methods] Nineteen healthy male subjects were recruited for this study. All subjects performed the traditional plank exercise (TP), plank exercise with isometric hip adduction (PHAD), and plank exercise with isometric hip abduct...

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ژورنال

عنوان ژورنال: British Journal of Sports Medicine

سال: 2004

ISSN: 0306-3674

DOI: 10.1136/bjsm.2002.003277