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Isometric Strength Database for Muscle Maximal Voluntary Endurance Field Tests: Normative Data

  • Janik, Frédérick1, 2
  • Toulotte, Claire1
  • Seichepine, Anne Laure2
  • Masquelier, Bernadette2
  • Barbier, Fabienne2
  • Fabre, Claudine1
  • 1 ULR 7369 - URePSSS - Unité de Recherche Pluridisciplinaire Sport Santé Société, Lille, France , Lille (France)
  • 2 Centre de Réadaptation Fonctionnelle “Les Hautois” - Groupe AHNAC, Oignies, France , Oignies (France)
Published Article
Sports Medicine - Open
Springer International Publishing
Publication Date
Jul 12, 2021
DOI: 10.1186/s40798-021-00338-2
Springer Nature
  • Original Research Article


BackgroundDifferent field tests are used to evaluate muscle capacity, in particular maximal voluntary isometric endurance. However, although there are some normative values for a few muscle endurance tests, these do not consider the weight, height, gender, or age of individuals, which are well-known factors that influence muscle performance.Hypothesis/PurposeThe purpose of this study was to investigate the test–retest reproducibility of eight field tests and establish muscle endurance norms, in a healthy population, based on their anthropometric characteristics, which could allow the optimal evaluation of the entire muscle function in a quick manner.DesignCase series.MethodsThis study was conducted in two phases. The first phase was to check the reproducibility inter- and intra-assessor for eight isometric muscle field tests on 20 volunteer subjects aged 40.9 ± 11.6 years old (age range, 21–58 years). The second part was to establish muscle maximal voluntary isometric endurance norms according to these tests on a total of 400 healthy participants grouped by age (50 males and females in each of the age brackets, 20–29; 30–39; 40–49; 50–59 years old, for a total of 200 males and 200 females).ResultsThe intra- and inter-assessor reproducibility tests are good for all muscle measurements (the intraclass correlation coefficients varied between 0.915 and 0.996 and the coefficient of variation between 3.6 and 11.8%). The area under the receiver operating characteristic curves demonstrates a good sensibility with values greater than 0.7 for each test. Each muscle belt presents same ratio regardless of the age and gender group. The simultaneous multiple regression analyses highlight that the anthropometric characteristics of subjects influence significantly the performance of isometric tests.ConclusionThis study has permitted establishing prediction equations in a healthy population according to their anthropometric characteristics as well as agonist/antagonist ratios for eight muscle isometric field tests after demonstrating a good reproducibility of all tests.

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