Age-related Differences of Physical Fitness Profiles and Anaerobic Performance in Elite Soccer Players U-12, U-15 and U-18

2021 ◽  
Vol 19 (4) ◽  
pp. 985-993
Author(s):  
KyoungHo SEO ◽  
◽  
Jihoon Kang
Kinesiology ◽  
2021 ◽  
Vol 53 (1) ◽  
pp. 56-64
Author(s):  
Asier Los Arcos ◽  
Asier Gonzalez-Artetxe

The aim of this study was to look into the alleged impact of the physical fitness performance of elite junior soccer players on the professional career according to playing position. The physical tests (sprint test, countermovement jump [CMJ], and maximal aerobic speed [MAS]) performed by 165 players enrolled in the junior team of a Spanish 1st Division club (1998-2010) were evaluated. Players were classified as those who were promoted to the reserve team (Reserve Team) and those who were not (non-Reserve Team), and as those who were promoted to the Spanish 1st/2nd Divisions (PFL) and those who were not (NPFL) until the 2020-2021 season. Overall, no significant differences (p>.05) were found between the Reserve Team and non-Reserve Team or between the PFL and NPFL players in neuromuscular performance. Aerobic fitness was greater (p<.05; ES = .79 ± .60 , moderate; mean difference = 3.0%) for the Reserve Team lateral midfielders in comparison to that for the non-Reserve Team. The results suggest that the impact of physical fitness on the promotion of elite junior soccer players is limited.


Retos ◽  
2020 ◽  
pp. 281-288
Author(s):  
Alfredo O. Araujo ◽  
Jose M. Cancela ◽  
Pedro Bezerra ◽  
Cesar Chaves ◽  
Luis P. Rodrigues

Age-related influences on somatic and physical fitness of elite police agents Influencias de la edad en la aptitud física y somática de los agentes de policía de élite Background: Elite police officers must be physically fit to perform their job occupational demands but information on the effect of age in their physical fitness and somatic composition is scarce. Our aim is to describe the effect of age on somatic and physical fitness of a Special Police Unit (SPU); and to understand age-related changes. Methods: 117 SPU elements of a total of 218, aged 42.6±4.2 years, were assessed on their somatic (height, weight, circumferences, skinfolds); body composition (BMI, body fat); and physical fitness (maximal, power and endurance strength, aerobic power, and flexibility). T-tests were used for comparing results to other police studies. Regression analysis was used to detect the effect of age for somatic and fitness variable. Results: SPU elements showed a homogeneous and suitable fitness condition. No somatic differences were found along age, but annual age losses were found for physical fitness, namely for strength: left handgrip strength (95%CI -0.70 to -0.12), bench press (95%CI -2.34 to -0.89), squat jump (95%CI -0.70 to -0.12), medicinal ball throw (95%CI -0.62 to -0.25), push-ups (95%CI -1.64 to -0.66), pull-ups (95%CI -0.53 to -0.11), sit-ups (95%CI -1.33 to -0.27), but also on the VO2max (-0.535 to -0.115). Conclusions: Portuguese SPU elements showed a good somatic and physical fitness condition according to the requirements of their profession. Regardless the effect of age they were able to maintain a good somatic fitness and a very good aerobic power along the years. The loss of strength was the most associated with age.  Resumen. Introducción: Los agentes de policía de élite deben estar en buena forma física para cumplir con las demandas ocupacionales de su trabajo, pero la información sobre el efecto de la edad en su condición física y composición somática es escasa. Nuestro objetivo es describir el efecto de la edad sobre la aptitud física y somática de una Unidad Especial de Policía (SPU); y comprender los cambios relacionados con la edad. Métodos: Se evaluaron 117 elementos SPU de un total de 218, con edad de 42,6 ± 4,2 años, en su morfología (altura, peso, circunferencias, pliegues cutáneos); composición corporal (IMC, grasa corporal); y aptitud física (fuerza máxima, potencia y resistencia, potencia aeróbica y flexibilidad). Se utilizaron pruebas t-Student para comparar los resultados con otros estudios policiales. Se utilizó el análisis de regresión para detectar el efecto de la edad para la variable somática y de aptitud. Resultados: Los elementos SPU mostraron una condición física adecuada y homogénea. No se encontraron diferencias somáticas a lo largo de la edad, pero se encontraron pérdidas de edad anuales para la condición física, es decir, para la fuerza: fuerza de prensión (IC 95%: -0,70 a -0,12), bench press (IC del 95%: -2,34 a -0,89), squat jump (IC 95%: -0,70 a -0,12), lanzamiento de pelota medicinal (IC 95%: -0,62 a -0,25), extensiones de brazo (IC 95%: -1,64 a -0,66), flexiones de brazo (IC 95%: -0,53 a -0,11), abdominales (IC 95%: -1,33 a -0,27), pero también sobre el VO2 máx. (-0,535 a -0,115). Conclusiones: Los elementos SPU portugueses mostraron una buena condición física y somática de acuerdo con los requisitos de su profesión. Independientemente del efecto de la edad lograron mantener una buena condición somática y una muy buena potencia aeróbica a lo largo de los años. La pérdida de fuerza fue la más asociada con la edad.


PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0249906
Author(s):  
Richard Hauer ◽  
Paul Störchle ◽  
Bettina Karsten ◽  
Harald Tschan ◽  
Arnold Baca

This study investigated the activity profile during small-sided games (SSG) in elite youth soccer players. Internal load (IL) including heart rate (HR) and external load (EL) such as distance covered in different speed-zones (SZ) were collected from forty-eight players of three different teams (U15, U16, U18). The investigation included a total of eighteen 5vs.5 SSGs, each consisting of four 2-minute bouts on a 40x32m pitch during spring season. Total group results (n = 48) showed a reduction in total-distance (p = 0.001; ηp2 = 0.12), high-intensity-running (p = 0.009; ηp2 = 0.09), and low-intensity-running distance (p = 0.028; ηp2 = 0.07) between bouts. Similarly, a reduction in the number of both acceleration-low (p = 0.001; ηp2 = 0.12) and deceleration-high (p = 0.003; ηp2 = 0.11) values was observed. Additionally, time spent in HR-zones 3 and 4 (p≤0.007; ηp2 ≥ 0.10), increased, with a reduction in HR-zone 1 (p = 0.000, ηp2 = 0.25). Age group comparison showed less distance covered in SZ 1 (p≤0.000; ηp2 = 0.56) and greater deceleration-high values (p≤0.038; ηp2 = 0.32) in U15 players compared to other age groups. Further, U15 showed lower values in low-intensity-running compared to U18 (p = 0.038; ηp2 = 0.22). No age-related differences were found for IL and repeated sprint ability (RSA) values. The higher EL in younger age groups should be taken into account when implementing soccer specific SSGs. In addition, HRmean values between 80–85% of HRmax and RSA numbers, which are similar to match-play data, indicate SSGs as an effective training tool to prepare youth soccer athletes for the demands of competition.


Author(s):  
Karim Saidi ◽  
Hassane Zouhal ◽  
Daniel Boullosa ◽  
Gregory Dupont ◽  
Anthony C. Hackney ◽  
...  

Objectives: To analyze biochemical markers, wellness status, and physical fitness in elite soccer players in relation to changes in training and match exposure during a congested period of match play. Methods: Fourteen elite soccer players were evaluated 3 times (T1, T2, and T3) over 12 weeks (T1–T2: 6-wk regular period of match play and T2–T3: 6-wk congested period of match play). Players performed vertical jump tests, repeated shuttle sprint ability test, and the Yo-Yo Intermittent Recovery Test at T1, T2, and T3. Plasma C-reactive protein, creatinine, and creatine kinase were analyzed at T1, T2, and T3. Wellness status was measured daily using the Hopper questionnaire (delayed onset of muscle soreness, stress, fatigue, and sleep quality). Training session rating of perceived exertion was also recorded on a daily basis. Results: A significant increase was found in stress, fatigue, delayed onset of muscle soreness scores, and Hopper index during the congested period (between T2 and T3) compared with the regular period (between T1 and T2) (.001 < P < .008, 0.8 < ES < 2.3). Between T2 and T3, significant relationships were found between the percentage variations (Δ%) of C-reactive protein, and Δ% of creatine kinase with the Hopper Index, and the Δ% of fatigue score. In addition, the Δ% of fatigue score and Δ% of delayed onset of muscle soreness score correlated with Δ% Yo-Yo Intermittent Recovery Test and Δ% best of repeated shuttle sprint ability test (.49 < r < P < .01). Conclusions: An intensive period of congested match play significantly compromised elite soccer players’ physical fitness and wellness status. Elite soccer players’ wellness status reflects declines in physical fitness during this period while biochemical changes do not.


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