Comparative study of two isokinetics dynamometers: CYBEX NORM vs CON-TREX MJ

Cotte, T.; Ferret, J. M.

doi:10.3233/ies-2003-0111

Cited by 19 publications

(6 citation statements)

References 9 publications

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“…The reliability and validity of the dynamometer have been confirmed in a previous study (Cotte and Ferret, 2003). Previous studies (Muramatsu et al, 2001;Maganaris et al, 2002) reported that large torque production induced inevitable rotation in the plantar flexion direction during isometric plantar flexion.…”

Section: Experimental Set-upmentioning

confidence: 59%

In vivo fascicle behavior of synergistic muscles in concentric and eccentric plantar flexions in humans

Chino

Oda

Kurihara

et al. 2008

Journal of Electromyography and Kinesiology

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Section: Experimental Set-upmentioning

confidence: 59%

In vivo fascicle behavior of synergistic muscles in concentric and eccentric plantar flexions in humans

Chino

Oda

Kurihara

et al. 2008

Journal of Electromyography and Kinesiology

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“…, 1996; Dauty & Rochcongar, 2001) and Cybex II (Gross et al. , 1991) or comparing the Cybex NORM with the Con‐Trex MJ (Cotte & Ferret, 2003; Bardis et al. , 2004).…”

Section: Discussionmentioning

confidence: 99%

Reliability of isokinetic strength imbalance ratios measured using the Cybex NORM dynamometer

Impellizzeri¹,

Bizzini²,

Rampinini³

et al. 2007

Clin Physio Funct Imaging

203

158

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The main aim of this study was to examine the absolute and relative reliability of some commonly used strength imbalance indices such as concentric hamstring-to-concentric quadriceps ratio, eccentric hamstring-to-concentric quadriceps ratio and bilateral concentric and eccentric strength ratios. An additional aim was to examine the reliability of the peak torque and work of the knee extensor and flexor muscles measured using the Cybex NORM dynamometer. Eighteen physically active healthy subjects (mean +/- standard deviation, age 23 +/- 3 years, height 176 +/- 5 cm, body mass 74 +/- 8 kg) were tested three times with 96 h between sessions. Peak torque, average work, unilateral and bilateral ratios were determined at 60, 120, 180 and -60 degrees s(-1). Low (0.34) to moderate (0.87) relative reliability (intraclass correlation coefficient, ICC) was found for strength imbalance ratios with eccentric hamstring-to-concentric quadriceps ratio showing the greater ICC (>0.80). High ICC values (0.90-0.98) were found for peak torque and average work. Absolute reliability (standard error of measurement) ranged from 3.2% to 8.7% for strength imbalance ratios and from 4.3% to 7.7% for peak torque and average work measurements. This study established the reliability of the most common strength imbalance ratios and of absolute isokinetic muscle strength assessed using the Cybex NORM.

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“…Isokinetic devices assess joint and muscle maximal concentric (CON), eccentric (ECC) and isometric (ISO) strength under constant velocities throughout the whole range of motion. Several studies have used isokinetic dynamometers to assess ISO and dynamic (CON and ECC) strength of the knee extensor and flexor muscles ( Bardis et al, 2004 ; Cotte and Ferret, 2003 ). Isokinetic devices are not only used in rehabilitation and sports medicine to assess risk factors such as low strength muscles but also in developing rehabilitation programmes for knee and hamstring injuries or imbalances ( Croisier, 2004 ; Dauty et al, 2003 ; Impellizzeri et al, 2008 ; Kannus, 1994 ).…”

Section: Introductionmentioning

confidence: 99%

Reliability of Concentric, Eccentric and Isometric Knee Extension and Flexion when using the REV9000 Isokinetic Dynamometer

Andrade

Caserotti

Carvalho

et al. 2013

Journal of Human Kinetics

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The aim of this study was to assess the reliability of isokinetic and ISO knee extensor and flexor muscle strength when using the REV9000 (Technogym) isokinetic dynamometer. Moreover, the reliability of several strength imbalance indices and bilateral ratios were also examined. Twenty-four physically active healthy subjects (age 23±3 years) underwent three testing sessions, two on the same day and a third, 7 days later. All sessions proceeded in the same order: five concentric contractions at 60ºs-1 followed by an isometric contraction (5 seconds) and five eccentric contractions (60ºs-1). The results of this study showed a high reproducibility in eccentric (0.95–0.97), concentric (0.95–0.96) and isometric (0.93–0.96), isokinetic strength for knee extensor and flexor muscles, thus indicating that the REV9000 isokinetic dynamometer can be used in future sports performance studies. A low-to-moderate reliability was found in the isokinetic strength bilateral ratios while the Hamstring:Quadricep concentric ratio showed moderate reliability. The highest reliability (>0.90) was observed in the dynamic control ratio (Hamstring eccentric:Quadricep concentric) which consequently confirms that it is a more valid indicator for imbalanced reciprocal parameters and can be used in rehabilitation and sports medicine.

show abstract

Comparative study of two isokinetics dynamometers: CYBEX NORM vs CON-TREX MJ

Cited by 19 publications

References 9 publications

In vivo fascicle behavior of synergistic muscles in concentric and eccentric plantar flexions in humans

In vivo fascicle behavior of synergistic muscles in concentric and eccentric plantar flexions in humans

Reliability of isokinetic strength imbalance ratios measured using the Cybex NORM dynamometer

Reliability of Concentric, Eccentric and Isometric Knee Extension and Flexion when using the REV9000 Isokinetic Dynamometer

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