Test-retest reliability of a functional electromechanical dynamometer on swing eccentric hamstring exercise measures in soccer players

Antonio Jesús Sánchez-Sánchez; Luis Javier Chirosa-Ríos; Ignacio Jesús Chirosa-Ríos; Agustín José García-Vega; Daniel Jerez-Mayorga

doi:10.7717/peerj.11743

Test-retest reliability of a functional electromechanical dynamometer on swing eccentric hamstring exercise measures in soccer players

PeerJ. 2021 Jul 14:9:e11743. doi: 10.7717/peerj.11743. eCollection 2021.

Authors

Antonio Jesús Sánchez-Sánchez^#¹, Luis Javier Chirosa-Ríos¹, Ignacio Jesús Chirosa-Ríos¹, Agustín José García-Vega¹, Daniel Jerez-Mayorga^#²

Affiliations

¹ Department Physical Education and Sports. Faculty of Sport Sciences, Universidad de Granada, Granada, Spain.
² Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago, Chile.

^# Contributed equally.

Abstract

Background: The use of a functional electromechanical dynamometer (FEMD) has been proposed as a valid and effective tool to evaluate specific movement patterns. The aim of this study was to determine the reliability of FEMD on swing eccentric hamstring exercise (SEHE) measures in soccer players.

Methods: Nineteen federated male soccer players (20.74 ± 4.04 years) performed the SEHE at three different isokinetic velocities (20-40-60 cm/s). These evaluations were conducted in four sessions, two for familiarization and two for registration. The average and maximum load (N) of the three isokinetic velocities was calculated from the values obtained from the FEMD (Dynasystem^®, Bangalore).

Results: The main results of this research showed that the reliability was high for the average load in the condition of 40 cm/s, presenting the highest ICC value (0.94). For maximum load, reliability was high in the condition of 20 cm/s. The manifestation of the most reliable load was the maximum load (ICC = 0.91-0.87).

Conclusions: FEMD (Dynasystem^®, Bangalore) is a reliable device to evaluate the eccentric strength of the hamstring muscles in soccer players.

Keywords: Dynamometer; Eccentric; Hamstring; Isokinetic; Lower extremity; Soccer players.

Grants and funding

This study was supported by FEDER/ Ministry of Science, Innovation and Universities—State Research Agency (Dossier number: RTI2018-099723-B-I00). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.