Isokinetic-based comparison of hamstrings – quadriceps ratio between soccer players and sedentary subjects

Tourny-Chollet, Claire; Leroy, David; Delarue, Y.; Beuret-Blanquart, F.

doi:10.3233/ies-2003-0121

Cited by 4 publications

(4 citation statements)

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“…The studies identified only tested men and functional ratios ranged from 0.57-1.05 (2) and 0.8-0.88 (26). It is difficult to compare across studies because Aagaard et al (2) made no mention of test leg and Tourny-Chollet et al (26) combined dominant and nondominant legs, whereas in the present study legs were analyzed separately. The functional ratios measured in the present study are more similar to other studies than are the conventional ratios.…”

Section: Discussionmentioning

confidence: 76%

“…It was believed that the quadriceps would be more developed than the hamstrings due to the demands of running and kicking. This was based largely on Tourny-Chollet et al (26) who reported lower functional H:Q ratios in experienced male soccer players (0.8 at 60Њ·s Ϫ1 and 0.88 at 120Њ·s Ϫ1 ) than sedentary men (0.93 at 60Њ·s Ϫ1 and 1.03 at 120Њ·s Ϫ1 ). This was credited to the extremely strong quadriceps in soccer players.…”

Section: Discussionmentioning

confidence: 99%

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Effect of Hamstring-Emphasized Resistance Training on Hamstring

Holcomb

Rubley

LEE

et al. 2007

Journal of Strength and Conditioning Research

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Holcomb, W.R., M.D. Rubley, H.J. Lee, and M.A.Guadagnoli. Effect of hamstring-emphasized resistance training on hamstring:quadriceps strength ratios. J. Strength Cond. Res. 21(1):41-47. 2007.-A decreased hamstring:quadriceps (H:Q) ratio may put the hamstrings and anterior cruciate ligament (ACL) at increased risk of injury. Therefore, the purpose of this study was to evaluate H:Q ratios of 12 female National Collegiate Athletic Association soccer players, and to test the effects of a 6-week strength training program on these ratios. Each subject completed 2 practice sessions before a pretest. Subjects then completed 6 weeks of strength training that included the addition of 2 hamstring specific exercises, followed by a posttest. Peak torque during concentric and eccentric actions for both hamstrings and quadriceps was measured with an isokinetic dynamometer. Each muscle action was tested at 3 angular velocities in the following order: concentric 240, 180, and 60Њ·s Ϫ1 and eccentric 60, 180, and 240Њ·s Ϫ1 . The H:Q strength ratio was evaluated using concentric muscle actions (concentric hamstrings: concentric quadriceps). This method is commonly used and is thus called the conventional ratio. Because concentric actions do not occur simultaneously in opposing muscles, a more functional assessment compares eccentric hamstring actions to concentric quadriceps actions. This functional ratio was also analyzed. Mean conventional and functional H:Q ratio data were analyzed using separate analysis of variance procedures with repeated measures on all factors (2 [Test] ϫ 2 [Leg] ϫ 3 [Angular Velocity]). The results revealed a significant main effect for factor (F test) with the functional ratio (p Ͻ 0.05) but not for the conventional ratio. The mean functional ratio increased from 0.96 Ϯ 0.09 in pretest to 1.08 Ϯ 0.11 in posttest. These results suggest that 6 weeks of strength training that emphasizes hamstrings is sufficient to significantly increase the functional ratio. The functional ratio after training exceeded 1.0, which is specifically recommended for prevention of ACL injuries.

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Section: Discussionmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Effect of Hamstring-Emphasized Resistance Training on Hamstring

Holcomb

Rubley

LEE

et al. 2007

Journal of Strength and Conditioning Research

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“…The hamstring-to-quadriceps ratio (H/Q) is the result of the peak torque value of knee flexors/extensors equation in concentric/concentric mode [6][7][8]. Although some studies investigated the optimal weekly repetitions volume per muscle group [9] and several studies have assessed the relationship between agonist and antagonist muscles balance using the isokinetic dynamometer [6,[10][11][12][13][14], few studies have associated the weekly repetitions volume with the deficit of knee joint flexor and extensor muscle strength. The objective of this study is to test the hypothesis that there is a relationship between the volume of weekly repetitions of RT and the balance of the knee extensor and flexor muscles.…”

Section: Introductionmentioning

confidence: 99%

Treinamento de resistência de flexores e extensores de joelho: existe relação entre o número de repetições semanais e equilíbrio de agonistas antagonistas?

Silva

Brugnerotto

Rodrigues

et al. 2021

Rev Bras Fisiol Exerc

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Introdução: O treinamento de volume semanal é um método de monitoramento e pode mostrar o equilíbrio dos músculos envolvidos nos movimentos articulares, como quadríceps e isquiotibiais até os movimentos de extensão e flexão do joelho. A relação isquiotibiais (I)/quadríceps (Q) no teste de torque isocinético é uma forma de analisar o risco de lesão no joelho. Métodos: Avaliar a relação entre o volume de repetições semanais e o equilíbrio muscular dos extensores e flexores do joelho em 21 sujeitos treinados em teste de torque isocinético em velocidades angulares de 60°/s e 300°/s. Resultados: A análise dos dados demonstrou que não houve diferença no volume semanal de repetições realizadas para Q e I, e apresentar ser pobre em I/Q, apesar de uma boa relação I/Q pobre em 300°/s. Conclusão: Esses dados contradizem a literatura atual, pois estudos mostram diferenças no treinamento de volume semanal entre quadríceps e isquiotibiais, bem como melhores valores da relação I/Q a 60°/s para pessoas sem lesão no joelho. Nossos dados contribuem para a discussão contínua sobre o equilíbrio muscular e a preservação da saúde do joelho.

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“…Soccer players' strength was previously studied with such tests as vertical jump and squats [7][8][9][10][11]. In contrast to these indirect methods, some authors have observed that the isokinetic dynamometry test for strength evaluation can be considered a modern technological method with a high predictive standard and great reliability [1,6,[12][13][14][15][16][17][18][19][20][21], utilized by distinguished soccer clubs and research centres. the actual soccer panorama indicates the importance of morphological, cardiovascular, and neuromuscular profiles of the players between their respective game positions [5].…”

Section: Introductionmentioning

confidence: 99%

Knee flexion and extension strength in young Brazilian soccer players: the effect of age and position

Herdy¹,

Galvão²,

Silva³

et al. 2018

Hum Mov.

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Purpose. to compare isokinetic knee flexors and extensors concentric muscle strength in young soccer players of different ages and playing positions. Methods. Seventy-seven young male soccer players were divided into 3 age categories: U-15, U-17, and U-20, with the consideration of 4 game positions: goalkeepers, defenders, midfielders, and forwards. the concentric tests of the hamstrings (Hcon) and quadriceps (Qcon) were performed at 30°/s, 60°/s, and 180°/s, and the ratio of 180°/30° was calculated. Results. the values of Qcon for the U-15 turned out significantly lower in comparison with the U-20 in 30°/s and 180°/s and in the 180°/30° ratio. the Hcon values for the U-15 were significantly lower than for the U-20 at 30°/s, 60°/s, 180°/s, as well as in the 180°/30° ratio. Strength levels were shown to be significantly different between the 3 analysed categories. the goalkeepers presented with Qcon and Hcon values significantly higher than the other playing positions, regardless of the angular velocity used. Conclusions. U-15, U-17, and U-20 athletes do not have the same level of strength. the goalkeepers demonstrated high strength values, suggesting the importance of specific training for each game position.

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Isokinetic-based comparison of hamstrings – quadriceps ratio between soccer players and sedentary subjects

Cited by 4 publications

References 1 publication

Effect of Hamstring-Emphasized Resistance Training on Hamstring

Effect of Hamstring-Emphasized Resistance Training on Hamstring

Treinamento de resistência de flexores e extensores de joelho: existe relação entre o número de repetições semanais e equilíbrio de agonistas antagonistas?

Knee flexion and extension strength in young Brazilian soccer players: the effect of age and position

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