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Test–Retest Reliability of the Functional Electromechanical Dynamometer for Squat Exercise

Author

Listed:
  • Indya del-Cuerpo

    (Strength & Conditioning Laboratory, CTS-642 Research Group, Department of Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain)

  • Daniel Jerez-Mayorga

    (Strength & Conditioning Laboratory, CTS-642 Research Group, Department of Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain
    Exercise and Rehabilitation Sciences Institute, School of Physical Therapy, Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago 7591538, Chile)

  • Pedro Delgado-Floody

    (Strength & Conditioning Laboratory, CTS-642 Research Group, Department of Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain
    Department of Physical Education, Sport and Recreation, Universidad de La Frontera, Temuco 4811230, Chile)

  • María Dolores Morenas-Aguilar

    (Strength & Conditioning Laboratory, CTS-642 Research Group, Department of Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain)

  • Luis Javier Chirosa-Ríos

    (Strength & Conditioning Laboratory, CTS-642 Research Group, Department of Physical Education and Sports, Faculty of Sports Sciences, University of Granada, 18071 Granada, Spain)

Abstract

Background: the main objective of this study was to evaluate the test-retest reliability of two different functional electromechanical dynamometry (FEMD)-controlled squat training protocols. Methods: twenty-eight healthy young adults volunteered to participate in this study. They attended the laboratory on four different days and performed four sessions: two of three sets of 12 repetitions at 75% 1RM and two of three sets of 30 repetitions at 50% 1RM. The range of movement (ROM), mean dynamic strength (MDS), peak dynamic strength (PDS), mean velocity (MV), peak velocity (PV), mean potency (MP), peak potency (PP), work (W), and impulse (I) were recorded. To evaluate the reliability of FEMD, the intraclass correlation coefficient (ICC), standard error of measurement (SEM), and coefficient of variation (CV) were obtained. Results: reliability was very high for ROM (CV: 3.72%, ICC: 0.95), MDS (CV: 1.09%, ICC: 1.00), PDS (CV: 1.97%, ICC: 1.00), and W (CV: 4.69%, ICC: 1.00) conditions at 50% 1RM and for ROM (CV: 3.90%, ICC: 0.95), MDS (CV: 0.52, ICC: 1.00), PDS (CV: 1.49%, ICC: 0.98), and W (CV: 4.14%, ICC: 1.00) conditions at 75% 1RM and high for the rest of variables at 50 and 75% 1RM. Conclusions: this study demonstrates that FEMD is a reliable instrument to measure ROM, MDS, PDS, MV, PV, PV, MP, MP, W, and I during both squat protocols (50 and 75% 1RM) in healthy young adults.

Suggested Citation

  • Indya del-Cuerpo & Daniel Jerez-Mayorga & Pedro Delgado-Floody & María Dolores Morenas-Aguilar & Luis Javier Chirosa-Ríos, 2023. "Test–Retest Reliability of the Functional Electromechanical Dynamometer for Squat Exercise," IJERPH, MDPI, vol. 20(2), pages 1-13, January.
    • Handle: RePEc:gam:jijerp:v:20:y:2023:i:2:p:1289-:d:1031686
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    References listed on IDEAS

    as
    1. Alejandro Pérez-Castilla & Danica Janicijevic & Zeki Akyildiz & Deniz Senturk & Amador García-Ramos, 2021. "Assessment of Back-Squat Performance at Submaximal Loads: Is the Reliability Affected by the Variable, Exercise Technique, or Repetition Criterion?," IJERPH, MDPI, vol. 18(9), pages 1-14, April.
    2. Daniel Jerez-Mayorga & Álvaro Huerta-Ojeda & Luis Javier Chirosa-Ríos & Francisco Guede-Rojas & Iris Paola Guzmán-Guzmán & Leonardo Intelangelo & Claudia Miranda-Fuentes & Pedro Delgado-Floody, 2021. "Test–Retest Reliability of Functional Electromechanical Dynamometer on Five Sit-to-Stand Measures in Healthy Young Adults," IJERPH, MDPI, vol. 18(13), pages 1-12, June.
    3. Enrique Cerda Vega & Daniel Jerez-Mayorga & Ramón Machado Payer & Christian Campos Jara & Iris Guzman-Guzman & Alvaro Reyes Ponce & Luis Javier Chirosa, 2018. "Validity and reliability of evaluating hip abductor strength using different normalization methods in a functional electromechanical device," PLOS ONE, Public Library of Science, vol. 13(8), pages 1-12, August.
    4. Waleska Reyes-Ferrada & Ángela Rodríguez-Perea & Luis Chirosa-Ríos & Darío Martínez-García & Daniel Jerez-Mayorga, 2022. "Muscle Quality and Functional and Conventional Ratios of Trunk Strength in Young Healthy Subjects: A Pilot Study," IJERPH, MDPI, vol. 19(19), pages 1-9, October.
    5. S. Argaud & B. Pairot de Fontenay & Y. Blache & K. Monteil, 2020. "Does aging cause joint mechanics redistribution during squat jumping?," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 23(S1), pages 12-14, October.
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