Lower Limb Functional Asymmetries in Young Soccer Players: Do Differences Exist Between Different Age Groups?

Sannicandro, Italo; Quarto, A.; Piccinno, Andrea; Cofano, Giacomo; Rosa, RA

doi:10.1136/bjsports-2014-093494.260

Cited by 9 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…9 However, in the present research, none of the asymmetry variables were different between categories. This finding is corroborated by Kellis et al 11 who also found no differences in asymmetry between players of different ages (10 to 17 years). However, Lehance et al 28 still suggested that asymmetry decreases with age, through observation of more athletes with asymmetry in the categories Sub17 and Sub21 than in the professional categories.…”

Section: Discussionsupporting

confidence: 76%

“…When comparing soccer players of different ages, a greater percentage in the 11-year age group than in the 9-year group had >15% asymmetry, suggesting that asymmetry increases with age, 11 thereby reinforcing the hypothesis proposed and the theoretical base model. 9 However, in the present research, none of the asymmetry variables were different between categories.…”

Section: Discussionsupporting

confidence: 72%

“…Nevertheless, when assessing the impact of age and competitive level on the production of strength and development of asymmetry, the results are controversial. 7,[10][11][12][13] Some studies have shown a linear increase in muscular strength with advancing age. 12,14,15 Accordingly, adult players of higher competitive level show superior strength than lower level players or amateurs.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of Competitive Level and Age on the Strength and Asymmetry of Young Soccer Players

Ferreira

Araújo

Pimenta

et al. 2018

Rev Bras Med Esporte

View full text Add to dashboard Cite

Introduction: Muscular strength is an essential capacity for soccer players; however, the profile of this capacity has not yet been clearly established in young players. Objective: To compare muscular strength performance in the countermovement jump (CMJ) task and the presence of lower limb asymmetry among soccer athletes of the under 15 (U15), under 17 (U17) and under 20 (U20) categories, and between two teams of different competitive levels. Methods: One hundred and fifty one young soccer players of three different categories (U15, U17 and U20) from two teams in the Brazilian first and second divisions performed six vertical jumps in a system of two force plates. Ground reaction force (GRF) was used to calculate jump height and to obtain the variables Peak force (FMAX), Impulse (I) and Peak power (PMAX) with regard to body mass and the respective asymmetry values. Results: No differences were found in the performance and asymmetry variable between the categories (Jump height: p=0.23; FMAX: p=0.15; I: p=0.11; PMAX: p=0.32; FMAX asymmetry: p=0.21; I asymmetry: p=0.58; PMAX asymmetry: p=0.58). The first division club had higher muscle strength and asymmetry values than the second division club (Jump height: p<0.01; I: p<0.01; PMAX: p<0.01; FMAX asymmetry: p<0.01; I asymmetry: p<0.01; PMAX asymmetry: p<0.01), except for FMAX (p=0.63). No variable had an interaction effect (club x category). Conclusion: As categories progress, jump height, relative I, PMAX and FMAX values and their respective asymmetries are stable. The asymmetry and strength performance of the first division club were higher than that of the second division club, except for FMAX, indicating that the competitive level may influence strength performance and the development of asymmetry. Level of Evidence II; Diagnostic study – Investigating a diagnostic test.

show abstract

Section: Discussionsupporting

confidence: 76%

Section: Discussionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Competitive Level and Age on the Strength and Asymmetry of Young Soccer Players

Ferreira

Araújo

Pimenta

et al. 2018

Rev Bras Med Esporte

View full text Add to dashboard Cite

show abstract

“…Recent evidence has shown that larger asymmetries are a key factor to consider in the return to play process after injury [6], are linked to reduced neuromuscular control during hopping tasks [7], and have a detrimental effect on measures of physical performance [8,9]. Recently, Bishop et al [8] showed that greater lower-limb asymmetries in jump height were associated with reduced 5, 10, 20 m sprint and vertical jump performance in youth female soccer athletes.…”

Section: Introductionmentioning

confidence: 99%

Effects of Maturation on Lower Limb Neuromuscular Asymmetries in Elite Youth Tennis Players

Madruga-Parera

Romero-Rodríguez

Bishop

et al. 2019

Sports

View full text Add to dashboard Cite

Neuromuscular asymmetries have been previously associated with reduced performance. Similarly, maturation has shown that youth athletes may experience a loss of motor control, which could also lead to compromised physical performance. The present study aimed to evaluate and quantify the level of asymmetry among chronological and maturational groups. Forty-one youth tennis players performed the single leg countermovement jump (SLCMJ), star excursion balance test (SEBT) and a change of direction speed (CODS) test. Differences were found between the strongest and weakest limbs across all tests (p < 0.001), and also for SEBT in the posteromedial direction (p = 0.02), SEBT composite score (p < 0.01) in maturation groups, and for SEBT posterolateral direction (p = 0.03) and SEBT composite score (p = 0.01) in chronological groups. The SLCMJ showed the largest inter-limb asymmetries for the circa peak height velocity (PHV) group (19.31 ± 12.19%) and under-14 (U14) group (17.55 ± 9.90%). Chronological and maturation groups followed similar trends for inter-limb asymmetries, but the biological index showed larger asymmetry scores in the jumping test at PHV compared to that found in the chronological group (U14). These results show that inter-limb differences may be heightened during PHV. Practitioners can use this information to inform the decision-making process when prescribing training interventions in youth tennis players.

show abstract

“…When considering flexor and extensor asymmetries as a categorical variable, two classification criteria were adopted. The first classification criterion used was the 15% value based on literature 9,11,16,20 and the second criterion was to establish cutoff points based on data distribution of the study, as performed by Impellizzeri et al 13 . The upper limit value for the lateral peak torque asymmetries obtained for a sample of 64 professional soccer players was 13.80% for knee flexor muscles and 12.32% for knee extensor muscles.…”

Section: Discussionmentioning

confidence: 99%

Comparação de dois critérios de classificação de jogadores de futebol profissional da assimetria lateral de força dos membros inferiores

Araújo

Medeiros

Zaidan

et al. 2017

Rev. Bras. Cineantropom. Desempenho Hum.

View full text Add to dashboard Cite

Prospective studies have indicated that assessing muscle function by the isokinetic test in the preseason is able to identify muscle strength variables that can be associated with injuries in the hamstring muscles of professional soccer players. However, the results are conflicting and could be related to the different cutoff points for the categorization of athletes in asymmetric or symmetric. Based on these conflicting results, the present study aims to: i) Identify the cutoff points of lateral asymmetry (LA) of the 95% confidence interval for the peak torque in soccer players, evaluated by the isokinetic test, taking into consideration the mean population value; ii) Compare LA between 15% cutoff point proposed in literature and the upper limit of 95% confidence interval (UP) of the study population. Sixty-four professional soccer players performed five knee flexion and extension repetitions at rate of 60°/s, with a one-minute interval. To determine the cutoff point for strength asymmetries, the UP was used, and for the purpose of diagnostic concordance of information among the different values, the McNemar’s χ² test was applied. The proportion between symmetric and asymmetric athletes was not different from the 15% cutoff point and the general population, both for knee flexors (χ² = 0.5, p = 0.250) and the knee extensors (χ² = 2.0, p = 0.125). It was concluded that the cutoff point of 15% referenced in literature for the general population provides similar diagnostic information for the classification of professional soccer players.

show abstract

Lower Limb Functional Asymmetries in Young Soccer Players: Do Differences Exist Between Different Age Groups?

Cited by 9 publications

References 0 publications

Impact of Competitive Level and Age on the Strength and Asymmetry of Young Soccer Players

Impact of Competitive Level and Age on the Strength and Asymmetry of Young Soccer Players

Effects of Maturation on Lower Limb Neuromuscular Asymmetries in Elite Youth Tennis Players

Comparação de dois critérios de classificação de jogadores de futebol profissional da assimetria lateral de força dos membros inferiores

Contact Info

Product

Resources

About