Effects of a conventional versus an alternative therapy program in male youth soccer players with jumper’s knee

This study aimed to describe habitual sleep and nocturnal cardiac autonomic activity (CAA), and their relationship with training/match load in male youth soccer players during an international tournament. Eighteen elite male youth soccer players (aged 14.8 ± 0.3 years; mean ± SD) participated in the study. Sleep indices were measured using wrist actigraphy, and heart rate (HR) monitors were used to measure CAA during night-sleep throughout 5 consecutive days. Training and match loads were characterized using the session-rating of perceived exertion (s-RPE). During the five nights 8 to 17 players slept less than <8 h and only one to two players had a sleep efficiency <75%. Players’ sleep duration coefficient of variation (CV) ranged between 4 and 17%. Nocturnal heart rate variability (HRV) indices for the time-domain analyses ranged from 3.8 (95% confidence interval, 3.6; 4.0) to 4.1 ln[ms] (3.9; 4.3) and for the frequency-domain analyses ranged from 5.9 (5.6; 6.5) to 6.6 (6.3; 7.4). Time-domain HRV CV ranged from 3 to 10% and frequency-domain HRV ranged from 2 to 12%. A moderate within-subjects correlation was found between s-RPE and sleep duration [r = −0.41 (−0.62; −0.14); p = 0.003]. The present findings suggest that youth soccer players slept less than the recommended during the international tournament, and sleep duration was negatively associated with training/match load.

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Altered landing mechanics are shown by male youth soccer players at different stages of maturation

Physical Therapy in Sport ◽

10.1016/j.ptsp.2018.07.001 ◽

2018 ◽

Vol 33 ◽

pp. 48-53 ◽

Cited By ~ 7

Author(s):

Paul J. Read ◽

Jon L. Oliver ◽

Gregory D. Myer ◽

Mark B.A. De Ste Croix ◽

Angus Belshaw ◽

...

Keyword(s):

Soccer Players ◽

Male Youth ◽

Youth Soccer ◽

Landing Mechanics

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Inter-individual Variability in Responses to 7 Weeks of Plyometric Jump Training in Male Youth Soccer Players

Frontiers in Physiology ◽

10.3389/fphys.2018.01156 ◽

2018 ◽

Vol 9 ◽

Cited By ~ 9

Author(s):

Rodrigo Ramirez-Campillo ◽

Cristian Alvarez ◽

Paulo Gentil ◽

Jason Moran ◽

Felipe García-Pinillos ◽

...

Keyword(s):

Individual Variability ◽

Soccer Players ◽

Male Youth ◽

Youth Soccer ◽

Jump Training

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Age-Matched Z-Scores for Longitudinal Monitoring of Center of Pressure Speed in Single-Leg Stance Performance in Elite Male Youth Soccer Players

The Journal of Strength and Conditioning Research ◽

10.1519/jsc.0000000000002765 ◽

2020 ◽

Vol 34 (2) ◽

pp. 495-505 ◽

Cited By ~ 2

Author(s):

Arnold Huurnink ◽

Duncan P. Fransz ◽

Vosse A. de Boode ◽

Idsart Kingma ◽

Jaap H. van Dieën

Keyword(s):

Center Of Pressure ◽

Soccer Players ◽

Male Youth ◽

Youth Soccer ◽

Single Leg Stance ◽

Z Scores

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Effect of the FIFA 11+ on Landing Patterns and Baseline Movement Errors in Elite Male Youth Soccer Players

Journal of Sport Rehabilitation ◽

10.1123/jsr.2018-0374 ◽

2020 ◽

Vol 29 (6) ◽

pp. 730-737 ◽

Cited By ~ 1

Author(s):

Hadi Akbari ◽

Mansour Sahebozamani ◽

Ablolhamid Daneshjoo ◽

Mohammadtaghi Amiri-Khorasani ◽

Yohei Shimokochi

Keyword(s):

Anterior Cruciate Ligament ◽

Cruciate Ligament ◽

Soccer Players ◽

Control Group ◽

Ligament Injuries ◽

Male Youth ◽

Warm Up ◽

Youth Soccer ◽

Anterior Cruciate Ligament Injuries ◽

Anterior Cruciate

Context: There is no evidence regarding the effect of the FIFA 11+ on landing kinematics in male soccer players, and few studies exist regarding the evaluating progress of interventions based on the initial biomechanical profile. Objective: To investigate the effect of the FIFA 11+ program on landing patterns in soccer players classified as at low or high risk for noncontact anterior cruciate ligament injuries. Design: Randomized controlled trial. Setting: Field-based functional movement screening performed at the soccer field. Participants: A total of 24 elite male youth soccer players participated in this study. Intervention: The intervention group performed the FIFA 11+ program 3 times per week for 8 weeks, whereas the control group performed their regular warm-up program. Main Outcome Measures: Before and after the intervention, all participants were assessed for landing mechanics using the Landing Error Scoring System. Pretraining Landing Error Scoring System scores were used to determine risk groups. Results: The FIFA 11+ group had greater improvement than the control group in terms of improving the landing pattern; there was a significant intergroup difference (F1,20 = 28.86, P < .001, ). Soccer players categorized as being at high risk displayed greater improvement from the FIFA 11+ program than those at low risk (P = .03). However, there was no significant difference in the proportion of risk category following the routine warm-up program (P = 1.000). Conclusions: The present study provides evidence of the usefulness of the FIFA 11+ program for reducing risk factors associated with noncontact anterior cruciate ligament injuries. The authors’ results also suggest that soccer players with the higher risk profile would benefit more than those with lower risk profiles and that targeting them may improve the efficacy of the FIFA 11+ program.

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Assessment of Injury Risk Factors in Male Youth Soccer Players

Strength and Conditioning Journal ◽

10.1519/ssc.0000000000000184 ◽

2016 ◽

Vol 38 (1) ◽

pp. 12-21 ◽

Cited By ~ 9

Author(s):

Paul J. Read ◽

Jon L. Oliver ◽

Mark B. A. De Ste Croix ◽

Gregory D. Myer ◽

Rhodri S. Lloyd

Keyword(s):

Risk Factors ◽

Injury Risk ◽

Soccer Players ◽

Male Youth ◽

Youth Soccer ◽

Injury Risk Factors

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Hopping and Landing Performance in Male Youth Soccer Players: Effects of Age and Maturation

International Journal of Sports Medicine ◽

10.1055/s-0043-114009 ◽

2017 ◽

Vol 38 (12) ◽

pp. 902-908 ◽

Cited By ~ 6

Author(s):

Paul Read ◽

Jon Oliver ◽

Mark De Ste Croix ◽

Gregory Myer ◽

Rhodri Lloyd

Keyword(s):

Injury Risk ◽

Soccer Players ◽

Height Velocity ◽

Chronological Age ◽

Peak Height Velocity ◽

Temporary Reduction ◽

Cross Sectional ◽

Male Youth ◽

Youth Soccer ◽

Increased Risk

AbstractQuantifying hopping and landing performances can assist coaches in identifying young male soccer players who may be at increased risk of injury. The influence of chronological age and maturation on these measures in this population is unknown. Single leg hop for distance (SLHD) and 75% horizontal hop and stick landing force (75%Hop) were examined in a cross-sectional sample (N=400) of elite male youth soccer players. Between-group differences for both chronological age (U11–U18) and stage of maturation (pre-, circa- or post-peak height velocity (PHV)) were analyzed. Absolute 75%Hop increased with both age and maturation. Apart from the U18s, pre-PHV and U11–U12 players displayed the greatest relative landing forces compared to all other groups (p<0.001; d=0.56–0.93). Absolute and relative SLHD were greatest in the U18s and post-PHV players (p<0.001; d=0.35–2.04). A trend showed increased SLHD with each consecutive age group although a reduction in performance was identified in the U13s (d=0.50–0.59). High volumes of accumulated soccer participation in the U18s may lead to altered landing strategies indicative of high injury risk. A temporary reduction in hop performance in the U13s may also be linked to a period of adolescent awkwardness.

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