Are There Differences in Concentric Isokinetic Strength Perfor-Mance Profiles between International and Non-International Elite Soccer Players?

Śliwowski, Robert; Marynowicz, Jakub; Grygorowicz, Monika; Wieczorek, Andrzej; Jadczak, Łukasz

doi:10.3390/ijerph18010035

Cited by 10 publications

(9 citation statements)

References 32 publications

(70 reference statements)

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“…Additionally, Chiaia et al reported that mean hip abductor torques demonstrated no difference between dominant and NDLs in elite female soccer players [31]. Sliwowski et al also reported an increase in symmetry of muscle strength at the international level when compared to the non-international level [30], which may have been influenced by the fact that the subjects in the present study were relatively young although at the elite level. Although asymmetry of muscle strength in the lower extremities and H/Q ratio has been reported to be a risk factor for several sports injuries, muscle strength differs between DLs and NDLs in soccer players clinically relevant information to know to enhance injury prevention.…”

Section: Discussionmentioning

confidence: 45%

“…There are several reports on the differences in muscle strength between DL and NDL or muscle strength asymmetry. Sliwowski et al reported that knee extension and flexion in the DL were stronger than in the NDL in male elite soccer players [30]. On the other hand, DeLang et al reported no asymmetry in muscle strength in all of the periarticular hip, knee extensor, and knee flexor muscles in male college soccer players [21].…”

Section: Discussionmentioning

confidence: 99%

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Musculoskeletal Asymmetry in Young Soccer Players: Differences between the Dominant and Nondominant Leg

Taketomi¹,

Kawaguchi²,

Mizutani³

et al. 2022

saj

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Section: Discussionmentioning

confidence: 45%

Section: Discussionmentioning

confidence: 99%

Musculoskeletal Asymmetry in Young Soccer Players: Differences between the Dominant and Nondominant Leg

Taketomi¹,

Kawaguchi²,

Mizutani³

et al. 2022

saj

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“…At this age, soccer players have not yet reached their maximum level of motor abilities. However, the magnitude of muscle torque also depends on the sports skill level [ 35 , 36 , 57 ]. Relatively low values of knee joint torques may also result from general training, which was mainly carried out without a strong focus on lower limb strength.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, speed and jumping abilities are crucial in decisive match situations in soccer. Moreover, it was reported that a higher H/Q ratio is associated with longer professional training [ 35 ] and higher sports skills in soccer [ 27 , 36 ]. This may lead one to ask whether a higher H/Q ratio, which is favorable for preventing hamstring strain and ACL injuries, will also be beneficial for the performance of sprinting and jumping tasks.…”

Section: Introductionmentioning

confidence: 99%

The Relationship between the Hamstring-to-Quadriceps Ratio and Jumping and Sprinting Abilities of Young Male Soccer Players

Diker

Struzik

Ön

et al. 2022

IJERPH

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The correct torque ratio between the knee joint extensor and flexor muscle groups can effectively prevent injuries to the anterior cruciate ligament and hamstring strain. However, it is unclear whether a high torque ratio of the knee joint flexor muscles to the extensor muscles is beneficial for sport performance. Therefore, the aim of the study was to investigate the relationship between the hamstring-to-quadriceps (H/Q) ratio and sprint times (10- and 30-m) and jump heights (CMJ—countermovement jump and SJ—squat jump) in soccer players. The study examined 26 young elite soccer players (age: 18.1 ± 0.7 years; body height: 1.77 ± 0.05 m; body mass: 72.7 ± 5.7 kg). Knee joint flexor and extensor peak torques were assessed using the Cybex dynamometer (at 60°/s, 120°/s and 180°/s). Additionally, each participant performed the CMJ, SJ, and 30 m sprint. A significant relationship was obtained between the H/Q ratio (60°/s) and 30 m sprint time (r = 0.47). The positive direction of this relationship may indicate an important role of knee joint extensors in sprinting performance. Moreover, the H/Q ratio was not significantly associated with the CMJ, SJ or 10 m sprint performance. The H/Q ratio should be considered together with the peak torque values in terms of the assessment of sprinting and jumping performance.

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“…Isokinetic knee muscle strength performance data were collected as previously described in Śliwowski et al (2017) and Śliwowski et al (2021) .…”

Section: Methodsmentioning

confidence: 99%

The relationships between knee extensors/ flexors strength and balance control in elite male soccer players

Śliwowski¹,

Marynowicz²,

Jadczak³

et al. 2021

PeerJ

Self Cite

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Background Strength and balance are important factors for soccer players to be successful. This study’s aim was to determine the relationship between lower-limb muscle strength and balance control in elite male soccer players (n = 77). Methods Concentric isokinetic strength (peak torque of quadriceps (PT-Q) and hamstrings (PT-H), hamstrings/quadriceps (H/Q) ratio) was measured for the dominant and non-dominant leg at angular velocities of 60°s−1and 240°s−1, as well as the total work for extensors (TW-Q) and flexors (TW-H) for both legs (at an angular velocity of 240°s−1only). Balance score (BAL score) was used for unilateral assessment of balance control using a Delos Postural System Test measurement tool. Hierarchical multiple regression analyses were performed to predict balance control using isokinetic knee strength performance for dominant and non-dominant legs. Results Final modelling included peak torque of hamstrings at 240°s−1 and peak torque of the quadriceps at 240°s−1 for the non-dominant leg (R2 = 19.6%; p ≤ 0.001) and only peak hamstring torque at 240°s−1 for the dominant leg (R2 = 11.3%; p = 0.003) as significant predictors of balance score. Conclusion Findings indicate that balance control is widely influenced by peak hamstring torque and peak quadriceps torque at high angular velocity particularly in the non-dominant leg i.e., the supporting leg in soccer players.

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Are There Differences in Concentric Isokinetic Strength Perfor-Mance Profiles between International and Non-International Elite Soccer Players?

Cited by 10 publications

References 32 publications

Musculoskeletal Asymmetry in Young Soccer Players: Differences between the Dominant and Nondominant Leg

Musculoskeletal Asymmetry in Young Soccer Players: Differences between the Dominant and Nondominant Leg

The Relationship between the Hamstring-to-Quadriceps Ratio and Jumping and Sprinting Abilities of Young Male Soccer Players

The relationships between knee extensors/ flexors strength and balance control in elite male soccer players

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