Isokinetic assessment of knee flexors and extensors in professional soccer players

Croisier, Jean-Louis; Réveillon, Vincent; Ferret, J. M.; Cotte, T.; Genty, M.; Popović, Nebojša; Mohty, F.; Faryniuk, J. E.; Ganteaume, S.; Crielaard, Jean-Michel

doi:10.3233/ies-2003-0124

Cited by 41 publications

(35 citation statements)

References 2 publications

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“…Except one study,15 published data in the literature (including the current study) have showed that strength imbalances (ie, the hamstring : quadriceps ratio) to be a risk factor for hamstring injuries1819212829 It is uncertain why the findings from Bennell et al 15 differ from other studies, despite the fact that their study was well designed and executed. Also, the possibility of publication bias against small studies with negative results cannot be ruled out.…”

Section: Discussionmentioning

confidence: 65%

“…A study on intercollegiate football players suggested a conventional hamstring : quadriceps of greater than 0.55 at 60°/s was a safe cut-off for returning to sports after injury 7. Comparatively, another study29 in professional football players determined a cut-off point to be 0.47 at 60°/s. The finding of differences in hamstring : quadriceps ratios among athletes in different sports30 (elite volleyball players and soccer players in this particular study) supports the notion that sports with different demands should not use the same hamstring : quadriceps ratio criteria.…”

Section: Discussionmentioning

confidence: 99%

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A prospective cohort study of hamstring injuries in competitive sprinters: preseason muscle imbalance as a possible risk factor

2009

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Section: Discussionmentioning

confidence: 65%

Section: Discussionmentioning

confidence: 99%

A prospective cohort study of hamstring injuries in competitive sprinters: preseason muscle imbalance as a possible risk factor

2009

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“…Fitness coaches and doctors suppose that greater muscle asymmetry between the limbs increases the risk of injury. More attention should be paid to boys whose difference between the limbs is >15 % [33, 38, 39]. Veligekas and Bogdanis [40] present in pre-pubertal boys (10–12 years old) bilateral deficit of 9.0±1.6 % (CMJ FA ).…”

Section: Discussionmentioning

confidence: 99%

The bilateral strength and power asymmetries in untrained boys

et al. 2015

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The aim of the study was to identify the level of isokinetic strength and power of lower limbs in 13-year-old untrained boys (n=22, height: 158.5±8.0 cm, mass: 49.1±12.6 kg), to determine bilateral deficit between the limbs in the tests and examine their mutual relationship. Maximum peak muscle torque of knee extensors (PTQ) and flexors (PTH) on dominant (DL) and non-dominant leg (NL) were measured by isokinetic dynamometer. Three types of a vertical jump: countermovement jump with (CMJFA) and without arms (CMJ) and squat jump (SJ) were performed on two force platforms.We found the significant effect (p<.01) of independent variables (knee extensors, flexors, AV) and their interaction on PT. AV did not indicate any significant effect on bilateral ratio of knee extensors (F4,84=.74, p>.05, ηp2=0.03), however a significant effect of AV was found in knee flexors (F4,84=2.70, p<.05, ηp2=.114). The type of jump had no effect on the difference between force exerted by DL and NL (F1,21=.102, p>.05, ηp2=.01). Bilateral deficit (Q:Q, H:H) did not significantly correlate with bilateral deficit in jumps (p>.05).Despite the possibility of identifying muscle asymmetries in the sense of strength imbalances, their mutual relationship with results in isokinetic dynamometry and power jump tests is still unclear.

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“…Several studies have investigated the relationship between isokinetic strength ratios and hamstring injury. Croisier et al [10] demonstrated that there was a risk factor for hamstring injuries of 15% for players that had isokinetic strength imbalances. Conversely, the risk factor was only 3% for players that had no isokinetic strength imbalances.…”

Section: Introductionmentioning

confidence: 99%

“…However both studies targeted ACL injuries, for which the utility of this ratio is physiologically reasonable. In trying to extend the application of the DCR, Dauty et al [11] and Croisier et al [7,8,10] who employed different concentric and eccentric velocities were able to demonstrate that this ratio could also detect previous hamstring muscle injury.…”

Section: Introductionmentioning

confidence: 99%

Validity of isokinetic testing for previous hamstring injury detection in soccer players

Houweling

Head

Hamzeh

2009

IES

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The purpose of this study was to determine the most accurate isokinetic testing method, either concentric/concentric or concentric/eccentric, for the detection of previous hamstring injury. Twenty-one male semi-professional soccer players were recruited from premier divisions of the Sunday football league and the Isthmian league division one in England and examined on a Cybex Norm isokinetic dynamometer. Eleven players had suffered previous hamstring injury whilst ten players that had never suffered hamstring injury formed the control group. For each group the following ratios were determined: unilaterally: concentric hamstring/concentric quadriceps, eccentric hamstring/concentric quadriceps; bilaterally: concentric hamstring, eccentric hamstring and concentric quadriceps at both 60 • /s and 120 • /s. The Area Under the Curve (AUC) of Receiver Operating Characteristics (ROC) provided a summary measure of the validity of each test. Significant differences between injury and non-injury groups were found for the bilateral concentric hamstring ratio measured with a concentric/concentric testing method at 60 • /s (AUC = 0.773, P < 0.05). All other ratios rendered non-significant AUC values. In addition, non-significant AUC were recorded for all ratios measured at 120 • /s. Therefore, these observations suggested that the concentric/concentric testing method may be suitable for detecting previous hamstring injury. In addition, these findings suggested that a lower speed (60 • /s) should be utilized for the muscular strength analysis of soccer players suffering from hamstring injury.

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Isokinetic assessment of knee flexors and extensors in professional soccer players

Cited by 41 publications

References 2 publications

A prospective cohort study of hamstring injuries in competitive sprinters: preseason muscle imbalance as a possible risk factor

A prospective cohort study of hamstring injuries in competitive sprinters: preseason muscle imbalance as a possible risk factor

The bilateral strength and power asymmetries in untrained boys

Validity of isokinetic testing for previous hamstring injury detection in soccer players

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