The influence of age and maturity status on the maximum and explosive strength characteristics of elite youth female soccer players

Emmonds, Stacey; Morris, Rhys; Murray, Eoin; Robinson, C; Turner, Luke; Jones, Ben

doi:10.1080/24733938.2017.1363908

Cited by 28 publications

(38 citation statements)

References 30 publications

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“…Generally comparable results showing an influence of predicted maturity status based on predicted maturity offset, i.e., time before or after PHV on absolute values of peak force were noted in a cross-sectional study of 157 female soccer players combined across four competitive age groups, U10 through U16 [49]. However, conclusions based on predicted maturity offset as an indicator of maturity status across this broad age range should be interpreted with caution given limitations of the equation used to predict maturity offset in girls.…”

Section: Discussionmentioning

confidence: 56%

Scaling left ventricular mass in adolescent female soccer players

et al. 2020

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Background: The aim of the study was to examine the contribution of chronological age (CA), skeletal maturation, training experience and concurrent body size descriptors, to inter-individual variance in left ventricular mass (LVM) among female adolescent soccer players. Methods: The sample included 228 female soccer players 11.8-17.1 years. Training experience defined as years of participation in competitive soccer (range 2-9 years), was obtained by interview. Stature, body mass and skinfolds (triceps, medial calf) were measured. Fat mass was estimated; Fat-free mass was derived. LVM was assessed by echocardiography. Skeletal maturity status was as the difference of skeletal age (SA, Fels method) minus CA. Results: Fat-free mass was the most prominent single predictor of LVM (R 2 = 36.6%). It was associated with an allometric coefficient close to linearity (k = 0.924, 95%CI: 0.737 to 1.112). A significant multiplicative allometric model including body mass, fat-free mass, CA, training experience and skeletal maturity status was also obtained (R = 0.684; R 2 = 46.2%). Conclusion: Stature has limitations as a valid size descriptor of LVM. Body mass, fat-free mass, training experience, CA, body mass and skeletal maturity status were relevant factors contributing to inter-individual variability in LVM.

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Section: Discussionmentioning

confidence: 56%

Scaling left ventricular mass in adolescent female soccer players

et al. 2020

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“…At the elite level, soccer requires high technical ability, tactical awareness, and a high level of physical conditioning (6). Therefore, women's soccer clubs are now investing in youth academies, designed to develop future professional players (10).…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, Bradley et al (2) reported that players performed better on the Yo-Yo Intermittent Endurance Test Level 2 (YYIEL2) than non-elite players, highlighting the importance of testing and training the ability to sustain high intensity running in female soccer players. Therefore, it is important that the monitoring development of these physical qualities as part of a long term athletic development (LTAD) programme is incorporated into the training programme for youth female soccer players (10).…”

Section: Introductionmentioning

confidence: 99%

“…Within England, talented youth female soccer players between the ages of 8-16 years are recruited to attend Regional Talent Centre's (RTC's), with the purpose to develop players for the elite senior game. Cross-sectional data examining the physical qualities of elite youth female soccer players exists, demonstrating that physical qualities develop with increasing age (10,11,31). While cross-sectional data are useful for player monitoring and evaluation purposes, the nature of such one-off assessments fails to provide information around the development of physical qualities.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal Changes in the Physical Performance of Elite Youth Female Soccer Players

Emmonds¹,

Sawczuk²,

Scantlebury³

et al. 2020

Journal of Strength and Conditioning Research

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This study investigated the seasonal change in physical performance of 113 (Under 10: U10 (n=20), U12 (n=30), U14 (n=31) and U16 (n=32)) elite youth female soccer players. Players completed testing pre-, mid-and post-season, including speed (10 and 30m sprint), change of direction (CoD; 505 test), power (Countermovement jump, CMJ), strength (isometric midthigh pull) and aerobic capacity (YoYo Intermittent Recovery Test Level 1; YYIRL1). A general linear model was used to evaluate the change in physical characteristics and the influence of covariates (baseline performance; change in maturity status) on each characteristic across the season. U10's speed and CoD performance decreased from pre-post season, while relative strength likely improved. U12's relative strength very likely improved, however 10m sprint performance decreased. Relative strength likely decreased, while 30m sprint and CoD time very likely improved in U14's. U16's likely improved relative strength, CMJ, 10m sprint and very likely improved 30m sprint and CoD from pre-post season. U12-U16's improved YYIRL1 performance pre-post season. Strength and conditioning coaches working with U10-U12 players should look to develop speed, lower body power and CoD ability as part of structured strength and conditioning sessions as well as within warm ups prior to pitch based sessions. With U14-U16 players manipulation of SSG's combined with short duration high-intensity running drills may provide an efficient training stimulus to develop the aerobic system whilst concurrently developing technical/tactical skills. Findings of this study provide a basis for the implementation of strategies to enhance the long-term athletic development of youth female soccer players.

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“…However, this study has some limitations requiring consideration. First, we did not control for the maturity status of the participants which could have been relevant as differences in neuromuscular performance have been observed between girls' soccer players after, compared to before their growth spurt [36]. The study sample was restricted to female soccer players aged between 12 and 14 years which limits the generalisation of this study.…”

Section: Discussionmentioning

confidence: 99%

Effects of verbal knee alignment instructions on knee kinematics, kinetics and the performance of a single-leg jump in female adolescent soccer players

Grooten

Karlefur

Conradsson

2019

European Journal of Physiotherapy

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Background:Little is known about the effects of verbal instructions on the technique and performance of sports-related tasks. The aim of this study was therefore to investigate the acute effects of knee alignment instructions on knee kinematics and the performance of a single-leg jump in female adolescent soccer players. Methods: Twenty-eight adolescent female soccer players completed three blocks of 15 single-leg jumps. The participants were randomised to an experimental group receiving verbal instructions focussing on proper knee alignment (the avoidance of knee valgus) or to a control group only receiving instructions on task execution. Outcomes were knee kinematics (flexion and valgus angles) and jump performance (number of incorrect trials and contact time).Results: The experimental group demonstrated 36% less knee valgus and 11-13% greater knee flexion compared to the control group. While jump performance remained unchanged in the experimental group over the course of the experiment, the control group demonstrated a 20% decrease in the number of incorrect trials and a 25% reduction in contact time over the course of the experiment. Conclusions: The present results indicate that verbal instructions accentuating proper knee alignment benefit knee kinematics but not jump performance in adolescent female soccer athletes. ARTICLE HISTORY

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The influence of age and maturity status on the maximum and explosive strength characteristics of elite youth female soccer players

Abstract: 2017) The influence of age and maturity status on the maximum and explosive strength characteristics of elite youth female soccer players.

Cited by 28 publications

References 30 publications

Scaling left ventricular mass in adolescent female soccer players

Scaling left ventricular mass in adolescent female soccer players

Seasonal Changes in the Physical Performance of Elite Youth Female Soccer Players

Effects of verbal knee alignment instructions on knee kinematics, kinetics and the performance of a single-leg jump in female adolescent soccer players

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