Intra- and Inter-Rater Reliability of a Well-Used and a Less-Used IsoMed 2000 Dynamometer for Knee Flexion and Extension Peak Torque Measurements in a Concentric Test in Athletes

Tuğba Kocahan,Bihter Akınoğlu,Beat Knechtle,Thomas Rosemann,Ayfer Ezgi Yilmaz

doi:10.3390/app11114951

Abstract

This study aimed to evaluate the intra- and inter-rater reliability of a well-used and a less-used IsoMed-2000 dynamometer for knee flexion and extension peak torque (PT) measurements in a concentric test in athletes. Two IsoMed-2000 isokinetic dynamometers were used, an old one that was well-used and a new one that was less-used. Thirty-seven weight-lifting athletes (12 female, 25 male) were included in this study. Both legs of each athlete were tested twice on each isokinetic dynamometer at 60°/s and 180°/s. The Intraclass Correlation Coefficients (ICC), Standard Error Measurement (SEM), Smallest Detectable Change (SDC), SDC% and 95% limits of agreement were calculated to evaluate the intra- and inter-rater reliability of a well-used and a less-used IsoMed 2000 dynamometer for knee flexion and extension peak torque in athletes. Intra-rater reliability was moderate to excellent (ICCs: 0.516–0.928) for knee muscle strength parameters, and the highest SDC and SEM values were 0.76 N/kg and 0.28 N/kg, respectively. Inter-rater reliability was moderate to excellent (ICCs: 0.519–915) for knee muscle strength parameters, and the highest SDC and SEM values were 0.81 N/kg and 0.29 N/kg, respectively. At least 89.2% of the obtained values of parameters fell within the 95% limits of agreement. Our findings demonstrate the intra and inter-rater reliability of a Well-Used and a Less-Used IsoMed 2000 Dynamometer for Knee Flexion and Extension Peak Torque in Athletes.

Highlights

Introduction iationsMuscle strength in athletes is one of the important determinants of sports performance, where muscle strength loss has been related with an increased risk of injury [1,2]
As a result of our observations, we found that our athletes sometimes demonstrated higher knee flexion peak torque (PT) values on one dynamometer but higher knee extension PT values on the other
There are some differences in the measured parameters, the values of the parameters obtained from at least 89.2% of them fall within the 95% agreement limits considering the parameters mentioned above; our findings demonstrate the intra and inter-rater reliability of a well-used and a less-used IsoMed-2000 dynamometer for knee flexion and extension peak torque measurements in a concentric test in athletes

Summary

Introduction

Introduction iationsMuscle strength in athletes is one of the important determinants of sports performance, where muscle strength loss has been related with an increased risk of injury [1,2]. Knee joint muscle strength is associated with the strength of other muscles of the body and is important for both athletes, trainers and health professionals working in this field since it effects sports performance regardless of sector [5]. For this reason, the strength of the knee flexor and extensor muscles is frequently evaluated both for the preparation and regulation of training programs at the beginning of the season, in the middle of the season, and at the end of the season to determine the amount of training necessary to reach the desired goal [2,5].

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