Selected isokinetic tests in knee injury prevention

Grygorowicz, Monika; Kubacki, J; Pilis, Wiesław; Gieremek, Krzysztof; Rzepka, Remigiusz

doi:10.5604/20831862.907793

Cited by 41 publications

(48 citation statements)

References 11 publications

(11 reference statements)

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“…For muscular capacity, 11 studies have looked into its association with sustaining a non-contact ACL injury (Ahmad, et al, 2006;Bee-Oh, et al, 2009;Bowerman, Smith, Carlson, & King, 2006;Grygorowicz, Kubacki, Pilis, Gieremek, & Rzepka, 2010;Hiemstra, Webber, MacDonald, & Kriellaars, 2007;Holcomb, Rubley, Lee, & Guadagnoli, 2007;Hosokawa, et al, 2011;Mattacola, et al, 2002;Roberts, Ageberg, Andersson, & Fridén, 2007;Wilkerson, et al, 2004;. These studies have associated muscular capacity with risks of acquiring ACL injury, validating ACL screening tools to be used in intervention programs to prevent ACL injury.…”

Section: Reflection On Associative Studiesmentioning

confidence: 99%

“…(Hiemstra, et al, 2007;Mattacola, et al, 2002;Roberts, et al, 2007;Wilkerson, et al, 2004; Isokinetic and isometric peak torques (Ahmad, et al, 2006;Bee-Oh, et al, 2009;Bowerman, et al, 2006;Grygorowicz, et al, 2010;Holcomb, et al, 2007;Hosokawa, et al, 2011). H:Q ratio Muscular Activation (Begalle, et al, 2012;Elias, et al, 2015;Nagano, et al, 2011;R.…”

Section: Author/yearmentioning

confidence: 99%

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Mapping current research trends on neuromuscular risk factors of non-contact ACL injury

Rafeeuddin

Sharir

Staes

et al. 2016

Physical Therapy in Sport

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Section: Reflection On Associative Studiesmentioning

confidence: 99%

Section: Author/yearmentioning

confidence: 99%

Mapping current research trends on neuromuscular risk factors of non-contact ACL injury

Rafeeuddin

Sharir

Staes

et al. 2016

Physical Therapy in Sport

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“…The ratio Fle/Ext scores are often determined by the concentric PT of the extensor and flexor muscles (Kong & Burns, 2010). 60% is used as benchmark at angular speed of 60º/s (Grygorowicz et al, 2010) and can reach up to roughly 80% with the increase of speed (Andrade et al, 2012), scores not reachable by the analyzed athletes. The literature review by Andrade et al (2012) showed that differences in physical fitness and sports activities may imply different abilities in the development of strength, and, consequently, in the ratio Flex/Ext of the knee.…”

Section: Juliete Palandi Elizze Ziero Ducatti Michele Poletti Vinímentioning

confidence: 99%

Untitled

2016

JPES

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Abstract:Weightlifting is a sport in which the athlete attempts to lift a barbell loaded with weight plates and the biomechanical demands of the lower limbs joints change. Thus, weightlifting plays a direct role to the knees involving their main extensor muscle groups and knee flexors. The present study used isokinetic evaluation to analyze muscle performance of the knee extensor and flexor muscles in male weightlifting athletes. The results demonstrated no statistically significant differences between the limbs, whether for mean peak torque values or for the flexor/extensor ratio. However, the results demonstrated muscle imbalances between the flexors and extensors, with the mean flexors PT values lower than expected when compared to the extensors. This result highlights the importance of training to increase the performance of the flexor muscles to reach an ideal level in relation to the extensor, thus improving athletic performance and preventing musculoskeletal injuries.

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“…In females, there is a greater quadriceps activation and decreased hamstrings co-activation due to hormonal factors, along with specific demands of the extensor of the dominant limb, which can increase muscle imbalance between opposing (agonists and antagonists) muscles [5][6][7][8] . The hamstrings/quadriceps peak torque ratio (HQ ratio) is an index used to evaluate the stabilizing efficiency of the knee joint muscles 9,10 . Specifically, it measures the ability of the hamstrings to neutralize tibial anterior translational forces produced by the knee extensors, providing dynamic joint stability during knee extension [9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

“…The hamstrings/quadriceps peak torque ratio (HQ ratio) is an index used to evaluate the stabilizing efficiency of the knee joint muscles 9,10 . Specifically, it measures the ability of the hamstrings to neutralize tibial anterior translational forces produced by the knee extensors, providing dynamic joint stability during knee extension [9][10][11] . It is well established that the HQ physiological peak torque ratio is 60% on average, representing the level of muscular balance.…”

Section: Introductionmentioning

confidence: 99%

Knee Isokinetic Torque Imbalance in Female Futsal Players

Rodrigues

Vieira

Marche

et al. 2017

Rev Bras Med Esporte

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Introduction: The specificity of sports training can lead to muscle specialization with a possible change in the natural hamstring/quadriceps torque ratio (HQ ratio), constituting a risk factor for muscle injury at the joint angles in which muscle imbalance may impair dynamic stability. Objective: The aim was to evaluate the torque distribution of the hamstrings and quadriceps and the HQ ratio throughout the range of motion in order to identify possible muscle imbalances at the knee of female futsal athletes. Methods: Nineteen amateur female futsal athletes had their dominant limb HQ ratio evaluated in a series of five maximum repetitions of flexion/extension of the knee at 180°/second in the total joint range of motion (30° to 80°). The peak flexor and extensor torque and the HQ ratio (%) were compared each 5° of knee motion using one-way repeated measures ANOVA and Tukey's post hoc test (p<0.05) to determine the joint angles that present muscular imbalance. Results: Quadriceps torque was higher than 50° to 60° of knee flexion, while hamstrings torque was higher than 55° to 65°. The HQ ratio presented lower values than 30° to 45° of knee flexion and four athletes presented values lower than 60%, which may represent a risk of injury. However, the HQ ratio calculated by the peak torque showed only one athlete with less than 60%. Conclusion: The HQ ratio analyzed throughout the knee range of motion allowed identifying muscle imbalance at specific joint angles in female futsal players.

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Selected isokinetic tests in knee injury prevention

Cited by 41 publications

References 11 publications

Mapping current research trends on neuromuscular risk factors of non-contact ACL injury

Mapping current research trends on neuromuscular risk factors of non-contact ACL injury

Untitled

Knee Isokinetic Torque Imbalance in Female Futsal Players

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