Predictors of vertical jumping capacity in soccer players

Križaj, Jožef; Rauter, Samo; Vodičar, Janez; Hadžić, Vedran; Šimenko, Jožef

doi:10.3233/ies-182138

Cited by 17 publications

(15 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This goes in line with findings by Young et al [ 7 ], who reported no correlations between jumping performance and strength parameters. However, Krizaj et al [ 21 ] reported knee extensor strength as an important predictor for jump capacity in elite soccer players [ 21 ]. Vanezis and Lees [ 5 ] concluded that a better jump performance was associated with the strength and rate of force development in all the relevant joints and muscles.…”

Section: Discussionmentioning

confidence: 99%

Joint Flexibility and Isometric Strength Parameters Are Not Relevant Determinants for Countermovement Jump Performance

Konrad

Reiner

Bernsteiner

et al. 2021

IJERPH

View full text Add to dashboard Cite

Vertical jumps are of great importance as a performance predictor for many types of sports that require speed and agility. However, to date, it is not clear if flexibility and/or the strength of the different leg muscles are determinants for countermovement jump (CMJ) performance. Therefore, the purpose of this study was to relate isometric maximum voluntary contraction (MVC) torque and the flexibility of various muscle groups of the lower body with CMJ performance. Thirty-six healthy male volunteers participated in this study. The participants performed MVCs of the knee extensors, knee flexors, and plantar flexors on a dynamometer. Moreover, range of motion of the hip flexors and plantar flexors was assessed with 3D motion capture, and the range of motion of the knee flexors (hamstrings) was assessed with a Sit n’ Reach® box. CMJs were assessed with a force platform. The correlation analysis revealed a significant moderate correlation of CMJ height with the flexibility of the hip flexors (rP = −0.39) and plantar flexors (rP = 0.47), but not the knee flexors. Moreover, we found that absolute MVC values are not related to CMJ height. However, we did find that knee extensor MVC relative to body mass is significantly related to CMJ height (rP = 0.33) with a moderate magnitude. Although we found significant correlations, the magnitudes of correlations vary between trivial and large according to a 90% confidence interval. Thus, this indicates that range of motion or strength of the assessed leg muscles can explain CMJ performance only to a limited extent.

show abstract

Section: Discussionmentioning

confidence: 99%

Joint Flexibility and Isometric Strength Parameters Are Not Relevant Determinants for Countermovement Jump Performance

Konrad

Reiner

Bernsteiner

et al. 2021

IJERPH

View full text Add to dashboard Cite

show abstract

“…Testing was performed for quadriceps and hamstrings in concentric and also for hamstring in eccentric mode. The iMoment, SMM isokinetic dynamometer (SMM, Maribor, Slovenia) was used for testing [ 38 , 39 , 40 ]. The device was calibrated, and the gravity correction was executed according to the manufacturer’s procedures.…”

Section: Methodsmentioning

confidence: 99%

Monitoring of Eccentric Hamstring Strength and Eccentric Derived Strength Ratios in Judokas from a Single Weight Category

Šimenko

Karpljuk

Hadžić

2022

IJERPH

Self Cite

View full text Add to dashboard Cite

Background: This study was designed to perform isokinetic knee testing of male judokas competing in the under 73 kg category. The main aims were: to establish the concentric (CON) and eccentric (ECC) strength profile of hamstrings (H) and CON profile of quadriceps (Q) muscles; to evaluate the differences in CON and ECC peak torques (PT) with various strength ratios and their bilateral asymmetries; the calculation of the dynamic control ratio (DCR) and H ECC to CON ratio (HEC); Methods: 12 judokas competing on a national and international levels with a mean age of 19 ± 4 years, a weight of 75 ± 2 kg and with a height of 176 ± 5 cm were tested. All the subjects were right-hand dominant. Isokinetic testing was performed on iMOMENT, SMM isokinetic machine (SMM, Maribor, Slovenia). The paired t-test was used to determine the difference between paired variables. The level of significance was set at p ≤ 0.05; Results: Statistical differences between left (L) and right (R) Q PT (L 266; R 241 Nm), H ECC PT (L 145; R 169 Nm), HQR (L 0.54; R 0.63), DCR (L 0.55; R 0.70), HEC (L 1.02; R 1.14) and PTQ/BW (L 3.57; R 3.23 Nm/kg) were shown. Bilateral strength asymmetries in CON contraction of 13.52% ± 10.04 % for Q, 10.86% ± 7.67 % for H and 22.04% ± 12.13% for H ECC contraction were shown. Conclusions: This study reports the isokinetic strength values of judokas in the under 73 kg category, emphasising eccentric hamstring strength and eccentric derived strength ratios DCR and HEC. It was shown that asymmetries are better detected using eccentric testing and that the dominant leg in judokas had stronger eccentric hamstring strength resulting in higher DCR and HEC.

show abstract

“…6 Exercises for vertical leaping like the squat jump (SJ) and the countermovement jump (CMJ) have mostly been recommended to measure lower body strength and muscle imbalance. 4,26,27 Although they both require specific equipment for evaluation, such as force platforms and jump applications, the SJ and CMJ are both recognized as straightforward and reliable field tests. The SJ assesses the ability to rapidly build force predominantly during the concentric movement, whereas the CMJ measures the capability to create force throughout the stretch-shortening cycle.…”

Section: Introductionmentioning

confidence: 99%

Lower limbs strength variations between injured and non-injured professional soccer players

Martins,

França,

Sarmento

et al. 2024

Science Progress

View full text Add to dashboard Cite

Due to its physical demands, professional soccer is becoming a real challenge regarding players’ exposure to high injury risk. Given its tight correlation with high-intensity actions, muscular strength is a crucial physical characteristic for soccer players. Therefore, the aims of this study are (a) to compare the vertical jumping performance during the season according to the injury profile, and (b) to investigate differences in isokinetic strength performance at the beginning and the end of the season. Twenty-one male professional soccer players (age: 26.0 ± 4.1 years, height: 181.0 ± 6.9 cm, body mass: 73.7 ± 6.9 kg) were assessed in isokinetic strength (Biodex System 4 Pro Dynamometer), and Optojump Next (Microgate, Bolzano, Italy). Isokinetic strength analyses considered the peak torque scores of knee flexors and knee extensors, according to the player's preferred and non-preferred limb. The countermovement and squat jump maximum height were assessed as lower body explosive strength indicators. No significant differences were found when comparing injured and non-injured players in vertical jump and isokinetic strength assessments. However, significant results were found when comparing both groups’ initial and final evaluation in isokinetic strength assessment, with both groups significantly improving their performance. Our findings indicate that the overall lower body strength performance was not a discriminant factor between injured and non-injury players. Thus, muscular strength assessment performance increased throughout the season independently of the injury profile. Future research needs to integrate other variables related to sports injuries since they seem to result from multifactorial causes.

show abstract

Predictors of vertical jumping capacity in soccer players

Cited by 17 publications

References 31 publications

Joint Flexibility and Isometric Strength Parameters Are Not Relevant Determinants for Countermovement Jump Performance

Joint Flexibility and Isometric Strength Parameters Are Not Relevant Determinants for Countermovement Jump Performance

Monitoring of Eccentric Hamstring Strength and Eccentric Derived Strength Ratios in Judokas from a Single Weight Category

Lower limbs strength variations between injured and non-injured professional soccer players

Contact Info

Product

Resources

About