Identification of previous hamstring muscle injury by isokinetic concentric and eccentric torque measurement in elite soccer player

Dauty, Marc; Potiron-Josse, M; Rochcongar, P.

doi:10.3233/ies-2003-0140

Cited by 70 publications

(100 citation statements)

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“…This is important because FHQ is almost certainly increased by velocity of the test [7,10,16] . Our study used 60 ° /s − 1 as it has been proposed to more accurately assess strength than higher velocities [6,26] and was used by Orchard and colleagues [23] in their prospective study of hamstring injury. Inferences of muscle balance are particularly interesting for injury prevention since a key fi nding of our study was that the U18 age group demonstrated a signifi cant move away from FHQ equality (1.0) when compared to the U13 age group (P < 0.05) and also the U12 age group on the dominant limb (P < 0.03).…”

Section: Concentric and Functional H: Q Ratiosmentioning

confidence: 99%

Isokinetic Thigh Muscle Ratios in Youth Football: Effect of Age and Dominance

et al. 2009

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This study aimed to analyse the effect of age on muscle peak torque (PT), and Hamstring (H): Quadricep (Q) ratio in elite youth footballers. To date, no study has considered age-group playing level and pubertal development in this population. One hundred and fifty-seven elite youth footballers in the age groups U12 to U18 volunteered to participate in this study, 133 of these were further grouped for pubertal development. Prior to testing subjects completed separate familiarisation, a three minute cycle ergometer warm up (resistance 50-60W), and two sub-maximal repetitions. Concentric and eccentric isokinetic PT measures for reps 2-4 of H and Q muscle action were taken at 60 degrees s (-1). From this, conventional and functional H: Q ratio was calculated along with dominant: non dominant ratio for the concentric Q and H, and eccentric H conditions. Significant main effects were observed for the age/pubertal development group and PT in all muscles and conditions (P<0.05). Of particular interest was a significant main effect for age and Functional H: Q (P<0.05), which suggested a move away from equality at U18. Our study provides normative data for coaches, trainers and clinicians working with youth footballers and may also have connotations for injury prevention and performance.

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Section: Concentric and Functional H: Q Ratiosmentioning

confidence: 99%

Isokinetic Thigh Muscle Ratios in Youth Football: Effect of Age and Dominance

et al. 2009

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“…Testing was performed at low and moderately high angular velocities: 60°s -1 and 180°s -1 . These angular velocities have been used by many investigators in order to evaluate knee muscular strength of soccer players [13,15,16]. A 30-s rest was allowed between tests for all subjects (between the two angular velocities).…”

Section: Isokinetic Testmentioning

confidence: 99%

Isokinetic strength training program for muscular imbalances in professional soccer players

et al. 2008

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The aim of the study was to investigate the effect of a muscular training program on soccer players' performance of which initially appeared imbalances or deficits. The study was conducte on 68 professional soccer players (age, 24.1±5.7 years; weight, 76.8±5.7 kg; height, 1.82±7 cm) participating in the championship of the first Greek national division over 2 years. During the preparation period, all the players performed an isokinetic test of knee flexors and extensors (60°s -1 and 180°s -1 ). These initial measurements detected muscular imbalances or deficits in 27 players (40%). The 27 players followed a specific isokinetic training program for 2 months, 3 times per week. After completion of the isokinetic training program, the 68 players repeated the isokinetic test. The analysis revealed significant differences between the pre-and post-training measures at both angular velocities in peak torque values, in differences from one limb to the other, and in peak torque ratios for flexors and extensors. Consequently, the application of this specific isokinetic training program can restore imbalances in knee muscle strength efficiently.

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“…When associated with electromyography, this technique can be used to quantify muscular strength, balance, power, and recruitment, and has been successfully applied in other biomechanical studies [5,6,9,14,23,27].…”

Section: Introductionmentioning

confidence: 99%

Biomechanical analysis of the muscular power of martial arts athletes

Machado

Osório

Silva

et al. 2010

Med Biol Eng Comput

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This study analyzes the performance of knee extension and flexion of Taekwondo and Kickboxing athletes. The power values were extracted through electromyography obtained by an isokinetic dynamometer at 60 degrees per second. These values are resulted from the square of the electromyography signal. The analysis of kick power was made using a modified wavelet algorithm considering values with 95% significance. Both groups presented equivalent power and torque capacity with different training times and experience, on the other hand, the wavelet analysis showed better results in muscular recruitment performance in athletes with more experience, in other words, power is not only performance but also power plus recruitment produces better results. This study uniquely showed that muscular enhancement capacity is not only related to the power capacity of contraction but also to motor coordination.

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Identification of previous hamstring muscle injury by isokinetic concentric and eccentric torque measurement in elite soccer player

Cited by 70 publications

References 0 publications

Isokinetic Thigh Muscle Ratios in Youth Football: Effect of Age and Dominance

Isokinetic Thigh Muscle Ratios in Youth Football: Effect of Age and Dominance

Isokinetic strength training program for muscular imbalances in professional soccer players

Biomechanical analysis of the muscular power of martial arts athletes

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