Estimation of 1RM for knee extension based on the maximal isometric muscle strength and body composition

Yoshikiyo Kanada, Hiroaki Sakurai, Yoshito Sugiura, Tomoaki Arai, Soichiro Koyama, Shigeo Tanabe

Research output: Contribution to journalArticle

Abstract

[Purpose] To create a regression formula in order to estimate 1RM for knee extensors, based on the maximal isometric muscle strength measured using a hand-held dynamometer and data regarding the body composition. [Subjects and Methods] Measurement was performed in 21 healthy males in their twenties to thirties. Single regression analysis was performed, with measurement values representing 1RM and the maximal isometric muscle strength as dependent and independent variables, respectively. Furthermore, multiple regression analysis was performed, with data regarding the body composition incorporated as another independent variable, in addition to the maximal isometric muscle strength. [Results] Through single regression analysis with the maximal isometric muscle strength as an independent variable, the following regression formula was created: 1RM (kg)=0.714 + 0.783 × maximal isometric muscle strength (kgf). On multiple regression analysis, only the total muscle mass was extracted. [Conclusion] A highly accurate regression formula to estimate 1RM was created based on both the maximal isometric muscle strength and body composition. Using a hand-held dynamometer and body composition analyzer, it was possible to measure these items in a short time, and obtain clinically useful results.

Original languageEnglish
Pages (from-to)2013-2017
Number of pages5
JournalJournal of Physical Therapy Science
Volume29
Issue number11
DOIs
Publication statusPublished - 01-01-2017

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Muscle Strength
Body Composition
Knee
Regression Analysis
Hand
Muscles

All Science Journal Classification (ASJC) codes

  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

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title = "Estimation of 1RM for knee extension based on the maximal isometric muscle strength and body composition",
abstract = "[Purpose] To create a regression formula in order to estimate 1RM for knee extensors, based on the maximal isometric muscle strength measured using a hand-held dynamometer and data regarding the body composition. [Subjects and Methods] Measurement was performed in 21 healthy males in their twenties to thirties. Single regression analysis was performed, with measurement values representing 1RM and the maximal isometric muscle strength as dependent and independent variables, respectively. Furthermore, multiple regression analysis was performed, with data regarding the body composition incorporated as another independent variable, in addition to the maximal isometric muscle strength. [Results] Through single regression analysis with the maximal isometric muscle strength as an independent variable, the following regression formula was created: 1RM (kg)=0.714 + 0.783 × maximal isometric muscle strength (kgf). On multiple regression analysis, only the total muscle mass was extracted. [Conclusion] A highly accurate regression formula to estimate 1RM was created based on both the maximal isometric muscle strength and body composition. Using a hand-held dynamometer and body composition analyzer, it was possible to measure these items in a short time, and obtain clinically useful results.",
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Estimation of 1RM for knee extension based on the maximal isometric muscle strength and body composition. / Kanada, Yoshikiyo; Sakurai, Hiroaki; Sugiura, Yoshito; Arai, Tomoaki; Koyama, Soichiro; Tanabe, Shigeo.

In: Journal of Physical Therapy Science, Vol. 29, No. 11, 01.01.2017, p. 2013-2017.

Research output: Contribution to journalArticle

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AU - Tanabe, Shigeo

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