Relationship between muscle echo intensity on ultrasound and isokinetic
strength of the three superficial quadriceps femoris muscles in healthy young
adults |
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| Authors: | Tomoyuki Yamauchi Takumi Yamada Yoshinao Satoh |
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| Affiliation: | 1) Department of Rehabilitation, Nihon University Hospital: 1-6 Kandasurugadai, Chiyoda-ku, Tokyo 101-8309, Japan;2) Department of Physical Therapy Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Japan;3) Department of Rehabilitation, Tokyo Metropolitan Rehabilitation Hospital, Japan |
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| Abstract: | [Purpose] The purpose of this study was to clarify the relationship between muscle echo intensity measured with ultrasound and the isokinetic strength of each of the three superficial quadriceps femoris muscles in healthy young adults. [Participants and Methods] We measured the echo intensity of the three superficial muscles of the quadriceps femoris in 25 healthy adults (10 males and 15 females; mean age, 22.3 years) using ultrasound. Moreover, we obtained the maximum force during isokinetic knee extension at 60°/s using an isokinetic dynamometer. [Results] In males and females, a significant negative correlation between echo intensity and muscle strength was found in the VM (r=−0.65 and r=−0.63, respectively). [Conclusion] In both males and females, only the muscle echo intensity of the vastus medialis was found to have a negative correlation with the maximum force during isokinetic knee extension at 60°/s. Our data lay the foundation for simplifying and rationally performing the measurement of muscle echo intensity of the quadriceps femoris. And it would therefore be sufficient to only measure the VM to clarify a relationship between EI and maximum isokinetic force in the quadriceps.Key words: Echo intensity, Isokinetic strength, Quadriceps femoris muscle |
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