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Peer-reviewedCC BY 4.0PeerJ

Reliability of a functional electromechanical dynamometer for a bilateral standing press exercise at intensities of 30% and 60% of isometric peak force in trained women

  • Claudio Cifuentes-Zapata1,2
  • Oscar Andrades-Ramírez3
  • Luis Romero-Vera4
  • David Ulloa-Díaz5
  • Ángela Rodríguez-Perea1,6
  • Claudio Carvajal-Parodi7
  • Álvaro Huerta Ojeda2
  • Sergio Araya-Sierralta8
  • Luis Javier Chirosa-Ríos1
8 affiliations
  1. 1Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
  2. 2Núcleo de Investigación en Salud, Actividad Física y Deportes ISAFYD, Escuela de Ciencias de la Actividad Física, Universidad de las Américas, Santiago, Chile
  3. 3Facultad de Educación y Ciencias Sociales, Universidad Andres Bello, Entrenador Deportivo, Concepción, Chile
  4. 4Facultad de Salud y Ciencias Sociales, Escuela de Ciencias de la Actividad Física, Universidad de las Américas, Concepción, Chile
  5. 5Department of Sports Sciences and Physical Conditioning, Universidad Católica de la Santísima Concepción, Concepción, Chile
  6. 6Department of Physical Education and Sport, Faculty of Physical Activity and Sports Sciences, Universidad de León, León, Spain
  7. 7Facultad de Ciencias de la Rehabilitación y Calidad de Vida, Escuela de Kinesiología, Universidad San Sebastián, Concepción, Chile
  8. 8Facultad de Humanidades y Educación, Universidad de Atacama, Copiapó, Chile
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Abstract

Background: Determining the reliability of exercise instruments and protocols in the fields of health and sports performance is of great interest due to their close relationship with monitoring and decision-making in athletes. Studies in trained women are limited, and more evidence is needed on performance variables and the reliability of exercise protocols.

Objective: This study aimed to evaluate the reliability of an exercise protocol for determining mean muscle strength, mean velocity, and mean power during the bilateral standing press (BSP) in trained women.

Methods: Sixteen trained women (age = 20.0 ± 2.30 years; body mass = 67.63 ± 6.68 kg; height = 1.65 ± 0.06 m) participated in this repeated-measures study. Absolute reliability was assessed using the coefficient of variation (CV), and relative reliability was assessed using the intraclass correlation coefficient (ICC) for a bilateral standing press (BSP) exercise protocol performed at intensities of 30% and 60% of isometric peak force (IPF).

Results: Mean muscle strength showed acceptable absolute reliability and extremely high relative reliability at both 30% IPF (CV = 6.51%; ICC = 0.94) and 60% IPF (CV = 5.03%; ICC = 0.97). Mean velocity showed extremely high relative reliability at 60% IPF (ICC = 0.92), but its absolute reliability was not acceptable at either 30% IPF (CV = 10.10%; ICC = 0.75) or 60% IPF (CV = 14.16%; ICC = 0.92). Mean power also exceeded the predefined CV threshold at 30% IPF (CV = 11.16%; ICC = 0.85) and at 60% IPF (CV = 14.35%; ICC = 0.89).

Conclusions: These findings suggest that the BSP protocol using functional electromechanical dynamometry is reliable for assessing mean muscle strength in trained women. However, mean velocity and mean power should be interpreted with caution, as their absolute reliability did not reach the predefined threshold of acceptable reliability.

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Cite

BibTeXRIS
BibTeX
@article{cifuenteszapata2026reliability,
  title = {{Reliability of a functional electromechanical dynamometer for a bilateral standing press exercise at intensities of 30% and 60% of isometric peak force in trained women}},
  author = {Claudio Cifuentes-Zapata and Oscar Andrades-Ramírez and Luis Romero-Vera and David Ulloa-Díaz and Ángela Rodríguez-Perea and Claudio Carvajal-Parodi and Álvaro Huerta Ojeda and Sergio Araya-Sierralta and Luis Javier Chirosa-Ríos},
  journal = {PeerJ},
  year = {2026},
  month = oct,
  doi = {10.7717/peerj.21777},
  url = {https://peerj.com/articles/21777},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Reliability of a functional electromechanical dynamometer for a bilateral standing press exercise at intensities of 30% and 60% of isometric peak force in trained women
AU  - Claudio Cifuentes-Zapata
AU  - Oscar Andrades-Ramírez
AU  - Luis Romero-Vera
AU  - David Ulloa-Díaz
AU  - Ángela Rodríguez-Perea
AU  - Claudio Carvajal-Parodi
AU  - Álvaro Huerta Ojeda
AU  - Sergio Araya-Sierralta
AU  - Luis Javier Chirosa-Ríos
PY  - 2026
DA  - 2026/10/15
JO  - PeerJ
DO  - 10.7717/peerj.21777
UR  - https://peerj.com/articles/21777
AB  - Background: Determining the reliability of exercise instruments and protocols in the fields of health and sports performance is of great interest due to their close relationship with monitoring and decision-making in athletes. Studies in trained women are limited, and more evidence is needed on performance variables and the reliability of exercise protocols.  Objective: This study aimed to evaluate the reliability of an exercise protocol for determining mean muscle strength, mean velocity, and mean power during the bilateral standing press (BSP) in trained women.  Methods: Sixteen trained women (age = 20.0 ± 2.30 years; body mass = 67.63 ± 6.68 kg; height = 1.65 ± 0.06 m) participated in this repeated-measures study. Absolute reliability was assessed using the coefficient of variation (CV), and relative reliability was assessed using the intraclass correlation coefficient (ICC) for a bilateral standing press (BSP) exercise protocol performed at intensities of 30% and 60% of isometric peak force (IPF).  Results: Mean muscle strength showed acceptable absolute reliability and extremely high relative reliability at both 30% IPF (CV = 6.51%; ICC = 0.94) and 60% IPF (CV = 5.03%; ICC = 0.97). Mean velocity showed extremely high relative reliability at 60% IPF (ICC = 0.92), but its absolute reliability was not acceptable at either 30% IPF (CV = 10.10%; ICC = 0.75) or 60% IPF (CV = 14.16%; ICC = 0.92). Mean power also exceeded the predefined CV threshold at 30% IPF (CV = 11.16%; ICC = 0.85) and at 60% IPF (CV = 14.35%; ICC = 0.89).  Conclusions: These findings suggest that the BSP protocol using functional electromechanical dynamometry is reliable for assessing mean muscle strength in trained women. However, mean velocity and mean power should be interpreted with caution, as their absolute reliability did not reach the predefined threshold of acceptable reliability.
SN  - 2167-8359
ER  -