Effect of Muscular Strength, Asymmetries and Fatigue on Kicking Performance in Soccer Players

2018 ◽  
Vol 39 (04) ◽  
pp. 297-303 ◽  
Author(s):  
Tomas Maly ◽  
Dai Sugimoto ◽  
Jana Izovska ◽  
Frantisek Zahalka ◽  
Lucia Mala
Keyword(s):  
Muscular Strength ◽  
Physical Load ◽  
Soccer Players ◽  
Knee Extensors ◽  
Physical Loading ◽  
Ball Velocity ◽  
Angular Velocities ◽  
Instep Kick ◽  
Strength Asymmetry ◽  
H:Q Ratio

AbstractThe aim of this study was to determine the effect of muscular strength, strength asymmetries, and fatigue on the speed and accuracy of an instep kick in soccer players. We measured ball velocity (BV) and kicking accuracy (KA) in the preferred (PL) and non-preferred leg (NPL) before (PRE) and after (POST) physical load in the PL. Maximum peak muscle torque of the knee extensors and flexors in the PL and NPL as well as ipsilateral knee flexors and knee extensors ratio (H:Q ratio) for both legs were assessed. BV was significantly decreased in POST physical load (5.82%, BVPRE=30.79±1.70 m·s−1, BVPOST=29.00±1.70 m·s−1, t19=3.67, p=0.00, d=1.05). Instep kick accuracy after the physical load worsened by an average of 10% in the most accurate trials. Results revealed a significant decrease in instep kick accuracy after physical loading (KAPRE=2.74±0.70 m, KAPOST=3.85±1.24 m, t19=–3.31, p=0.00, d=1.10). We found an insignificant correlation between H:Q ratio and KA in PRE test value, whereas a lower ipsilateral ratio (higher degree of strength asymmetry) in the POST physical load significantly correlated with KA in all angular velocities (r=–0.63 up to –0.67, p=0.00).

The effect of muscular strength and strength asymmetry on jumping height in soccer players

2021 ◽  
pp. 1-8
Author(s):  
Mikola Misjuk ◽  
Indrek Rannama
Keyword(s):  
Muscular Strength ◽  
Negative Impact ◽  
Relative Strength ◽  
Soccer Players ◽  
Knee Extensors ◽  
Arm Swing ◽  
Professional Soccer ◽  
Strength Asymmetry ◽  
The Asymmetry ◽  
Knee Flexors

BACKGROUND: Lower limb muscular asymmetry is not well studied and may have a negative impact on performance. OBJECTIVE: To estimate how muscular strength and strength asymmetry affect jumping performance in soccer players. METHODS: Twenty-eight male professional soccer players took part in the study. The countermovement jump (CMJ) without arm swing was used to determine jumping height. Muscle strength was measured concentrically at 60 and 300∘/s. RESULTS: The peak moment of the knee extensors was positively and significantly correlated with the CMJ; r= 0.608 at 300∘/s and r= 0.489 at 60∘/s. The asymmetry of the knee flexors between the stronger and weaker leg was negatively and moderately correlated with the CMJ at 300∘/s (r=-0.396). The regression model (R2= 0.474) showed that an increase of 0.18-Nm/kg in the relative strength of the knee extensors at 300∘/s (by one SD) was related to an increase of 3-cm in the CMJ. Reducing the asymmetry of the knee flexors by 6.8 percentage points (by one SD) was related to a rise of 1.7-cm in the CMJ. CONCLUSIONS: Greater strength in the knee extensors, preferably tested at higher velocity, and reduced asymmetry in the strength of the lower hamstring muscles have a statistically significant effect on the CMJ.

scholarly journals Profil izokinetickej sily extenzorov a flexorov kolena u mladých futbalových hráčov

2012 ◽  
Vol 6 (1) ◽  
pp. 53-60
Author(s):  
Tomáš Malý ◽  
František Zahálka ◽  
Lucia Malá ◽  
Jaroslav Teplan
Keyword(s):  
Angular Velocity ◽  
Research Group ◽  
Eccentric Contraction ◽  
Baseline Data ◽  
Soccer Players ◽  
Knee Extensors ◽  
Isokinetic Strength ◽  
Concentric Contraction ◽  
Angular Velocities

Th e aim of the study was to present isokinetic strength profi le of knee fl exors and extensors during concentric contraction in young soccer players. Particularly in knee fl exors was evaluated also strength during eccentric contraction. Research group was state from young soccer players U17 category (n=19, age=16,4±0,3 years). All of them are the participant of highest junior soccer league. Isokinetic strength was evaluated by isokinetic dynamometr Cybex Humac Norm in following angular velocities: 30, 60 and 120°/s in eccentric contraction and 60, 180, 240 and 300 °/s in concentric contraction. Th e results did not revealed signifi cant diff erences at three diff erent speed levels of knee fl exors’ strength during eccentric contraction (p>0,05). Regarding the concentric contraction we found signifi cant diff erences for strength production depending on angular velocity for both knee extensors and fl exors (p<0,01). Knee fl exors generated more strength during eccentric contraction compared to concentric contraction. Th e strength profi les developed in the present study can assist in the establishment of baseline data in young soccer players or for comparison values with other researchers.

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

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e12461
Author(s):  
Robert Śliwowski ◽  
Jakub Marynowicz ◽  
Łukasz Jadczak ◽  
Monika Grygorowicz ◽  
Paweł Kalinowski ◽  
...  
Keyword(s):  
Angular Velocity ◽  
Balance Control ◽  
Peak Torque ◽  
Soccer Players ◽  
Knee Extensors ◽  
Measurement Tool ◽  
Strength Performance ◽  
Angular Velocities ◽  
Postural System ◽  
The Relationship

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.

scholarly journals Intra- and Inter-Limb Strength Asymmetry in Soccer: A Comparison of Professional and Under-18 Players

Sports ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 129
Author(s):  
Chris Bishop ◽  
Giuseppe Coratella ◽  
Marco Beato
Keyword(s):  
Knee Extensor ◽  
Peak Torque ◽  
Soccer Players ◽  
Knee Extensors ◽  
Isokinetic Dynamometer ◽  
Percentage Difference ◽  
Strength Asymmetry ◽  
Limb Asymmetry ◽  
Limb Dominance ◽  
Anterior Posterior

(1) Background: the present study examined the isokinetic peak torque exerted by both knee extensors and flexors, anterior–posterior imbalance and the magnitude and direction of inter-limb asymmetry in professional and academy soccer players. (2) Methods: one hundred soccer players (professional = 50, elite academy = 50) volunteered to take part in this investigation. An isokinetic dynamometer was used to measure the knee extensor (quadriceps) and flexors muscle (hamstrings) torques of the limbs as well as inter-limb asymmetries—using a standard percentage difference equation. (3) Results: professional players exhibited significantly greater (effect size [ES] = large) strength levels in the quadriceps and hamstrings under both testing conditions, significantly higher (small to moderate) intra-limb ratio values for 60°·s−1 but not for the 300°·s−1 test condition, significantly (small to moderate) lower inter-limb asymmetry values for all test conditions, with the exception of the hamstrings at 60°·s−1 and the direction of asymmetry was poor to slight, indicating that limb dominance was rarely the same between groups. (4) Conclusions: this study shows that isokinetic assessments, i.e., peak torque exerted by both knee extensors and flexors and intra-limb ratio, and the subsequent inter-limb asymmetry, i.e., magnitude and direction, can differentiate between professional and academy soccer players.

Effect of repeated sprint training on isokinetic strength parameters in youth soccer players

2020 ◽  
pp. 1-9
Author(s):  
Kerem Özgünen ◽  
Çiğdem Özdemir ◽  
Ümüt Adaş ◽  
Abdullah Kilci ◽  
Cumhur Boyraz ◽  
...  
Keyword(s):  
Soccer Players ◽  
Knee Extensors ◽  
Isokinetic Strength ◽  
Sprint Training ◽  
Flexor Muscle ◽  
Strength Parameters ◽  
Youth Soccer ◽  
Repeated Sprint ◽  
Angular Velocities ◽  
Muscle Groups

BACKGROUND: Sprint drills are part of the soccer training routine for their resemblance to match activities. There is a lack of information in the literature about the changes in isokinetic skeletal muscle strength in response to sprint training. OBJECTIVE: This study evaluates the effects of eight weeks, on-season repeated sprint training with a change of direction on isokinetic strength parameters in well-trained youth soccer players. METHODS: Nineteen well-trained youth soccer players volunteered to participate in the study. The training program included three sets of six, 40 m (20 + 20 m) shuttle sprints twice a week for eight weeks. Isokinetic peak moment, work, and power of knee extensors and flexors were measured at angular velocities of 60, 180 and 240∘/s. Pre- and post-training valid isokinetic sector data were compared. RESULTS: Following the training period, dominant and non-dominant legs’ peak moment, work, and power values for both extensor and flexor muscle groups improved significantly at various angular velocities. CONCLUSIONS: Isokinetic strength enhancement may be explained with the induction of muscle hypertrophy following a prolonged period of sprint training.

scholarly journals 113 The study of ball velocity during instep kick among female and male soccer players

2013 ◽  
Vol 2013 (0) ◽  
pp. _113-1_-_113-6_
Author(s):  
Keiko SAKAMOTO ◽  
Ryota SASAKI ◽  
Yusuke TABEI ◽  
Sungchan HONG ◽  
Masao NAKAYAMA ◽  
...  
Keyword(s):  
Soccer Players ◽  
Ball Velocity ◽  
Instep Kick

scholarly journals Biomechanical Responds of Instep Kick between Different Positions in Professional Soccer Players

2009 ◽  
Vol 22 (1) ◽  
pp. 21-27 ◽  
Author(s):  
Mohammadtaghi Khorasani ◽  
Noor Osman ◽  
Ashril Yusof
Keyword(s):  
Angular Velocity ◽  
Lower Extremity ◽  
Digital Video ◽  
Lower Leg ◽  
Soccer Players ◽  
Video Cameras ◽  
Professional Soccer ◽  
Significant Difference ◽  
Ball Velocity ◽  
Instep Kick

Biomechanical Responds of Instep Kick between Different Positions in Professional Soccer PlayersThe purpose of this study was to investigate some selected biomechanical characteristics of lower extremity between professional soccer defenders, midfielders and strikers. The kicking motions of dominant legs were captured from fifteen Olympic professional soccer players; (height: 181.93 ± 7.03 cm; mass: 70.73 ± 10.85 kg; age: 20.8 ± 0.77 years), volunteered to participate in this study, using four digital video cameras. There were significant differences between midfielders and defenders in (1) lower leg angular velocity (p ≤ 0.001), (2) thigh angular velocity (p ≤ 0.001), (3) lower leg net moment (p ≤ 0.001), (4) thigh net moment (p ≤ 0.001), and (5) ball velocity (p ≤ 0.012). There were significant differences between midfielders and strikers in lower leg net moment (p ≤ 0.001). There were significant differences between strikers and defenders in; (1) lower leg angular velocity (p ≤ 0.001), (2) thigh angular velocity (p ≤ 0.001), (3) lower leg net moment (p ≤ 0.001), (4) thigh net moment (p ≤ 0.001), and (5) ball velocity (p ≤ 0.024). In conclusion, midfielders can perform soccer instep kicking strongly and faster than defenders and there is, however, no significant difference between midfielders and strikers, but midfielders' ball velocity is higher than strikers' ball velocity.

scholarly journals The Effect of Ankle Taping to Restrict Plantar Flexion on Ball and Foot Velocity During an Instep Kick in Soccer

2015 ◽  
Vol 24 (3) ◽  
pp. 261-267 ◽  
Author(s):  
Junpei Sasadai ◽  
Yukio Urabe ◽  
Noriaki Maeda ◽  
Hiroshi Shinohara ◽  
Eri Fujii
Keyword(s):  
Outcome Measures ◽  
Repeated Measures ◽  
Plantar Flexion ◽  
Soccer Players ◽  
Ankle Impingement ◽  
Ball Velocity ◽  
Posterior Ankle Impingement ◽  
Instep Kick ◽  
The Relationship ◽  
Ankle Plantar Flexion

Context:Posterior ankle impingement syndrome is a common disorder in soccer players and ballet dancers. In soccer players, it is caused by the repetitive stress of ankle plantar flexion due to instep kicking. Protective ankle dorsiflexion taping is recommended with the belief that it prevents posterior ankle impingement. However, the relationship between ankle taping and ball-kicking performance remains unclear.Objective:To demonstrate the relationship between the restrictions of ankle taping and performance of an instep kick in soccer.Design:Laboratory-based repeated-measures.Setting:University laboratory.Participants:11 male university soccer players.Intervention:The subjects’ ankle plantar flexion was limited by taping. Four angles of planter flexion (0°, 15°, 30°, and without taping) were formed by gradation limitation. The subjects performed maximal instep kicks at each angle.Main Outcome Measures:The movements of the kicking legs and the ball were captured using 3 high-speed cameras at 200 Hz. The direct linear-transformation method was used to obtain 3-dimensional coordinates using a digitizing system. Passive ankle plantar-flexion angle, maximal plantar-flexion angle at ball impact, ball velocity, and foot velocity were measured. The data were compared among 4 conditions using repeated-measures ANOVA, and the correlations between ball velocity and foot velocity and between ball velocity and toe velocity were calculated.Results:Ankle dorsiflexion taping could gradually limit both passive plantar flexion and plantar flexion at the impact. Furthermore, limitation of 0° and 15° reduced the ball velocity generated by instep kicks.Conclusion:Plantar-flexion-limiting taping at 30° has a potential to prevent posterior ankle impingement without decreasing the ball velocity generated by soccer instep kicks.

scholarly journals Profile, Correlation and Structure of Speed in Youth Elite Soccer Players

2014 ◽  
Vol 40 (1) ◽  
pp. 149-159 ◽  
Author(s):  
Malý Tomáš ◽  
Zahálka František ◽  
Malá Lucia ◽  
Teplan Jaroslav
Keyword(s):  
Latent Variable ◽  
Soccer Players ◽  
Maximum Speed ◽  
Significant Heterogeneity ◽  
Mutual Correlation ◽  
National Team ◽  
Ball Velocity ◽  
Instep Kick ◽  
Training Programmes ◽  
Three Components

Abstract Speed, power and agility are important components of fitness and determine the level of success and performance in soccer. The aim of this study was to identify speed variables and to determine their mutual correlation and structure in youth elite soccer players. The research group consisted of players from the Czech U16 national team (n = 22, age = 15.6 ± 0.4 years). Speed variables were assessed using the following tests: a) linear speed: 5 m sprint (S5), 10 m sprint (S10) and 20 m flying sprint (F20); b) the agility: agility test 505 with turning on the dominant (A505D) and nondominant legs (A505N) and the K-test (K) and c) ball velocity after an instep kick with the dominant (IKD) and nondominant (IKN) legs. Significant dependence was found for S5 compared with S10, F20 vs. A505N, K vs. A505N (p < 0.01) and S10 vs. F20 (p < 0.05). The factor analysis revealed three components of the latent variable - speed. The first component consisted of linear sprint (S10, S20) and also partially consisted of maximum speed (F20). The second component was primarily composed of agility (A505D, A505N, K) and also included maximum speed (F20). The third independent component represented ball velocity after an instep kick (IKD, IKN). The speed variables in youth elite players exhibited significant heterogeneity from the perspective of performance, as determined by the monitored tests. The structure of the speed predisposition indicated that there were three components of speed. The results of our studies support the notion that each component of speed must be considered independently when designing training programmes.

Sign in / Sign up

Export Citation Format

Share Document