scholarly journals Efectos de entrenamiento de fuerza en sistema isoinercial sobre la mejora del CMJ en jóvenes futbolistas de elite (Effects of strength training using a isoinertial device on jump ability in young elite soccer players)

Retos ◽  
2015 ◽  
pp. 180-182
Author(s):  
Sergio Romero Boza ◽  
Adrián Feria Madueño ◽  
Borja Sañudo Corrales ◽  
Moisés De Hoyo Lora ◽  
Juan José Del Ojo López
Keyword(s):  
Strength Training ◽  
Force Production ◽  
Team Sport ◽  
Soccer Players ◽  
Maximal Strength ◽  
Countermovement Jump ◽  
Palabras Clave ◽  
Jump Ability ◽  
Physical Skills

El fútbol es un deporte colectivo donde, para alcanzar el éxito, los jugadores necesitan de habilidades técnicas, tácticas y físicas, fundamentalmente de carácter intermitente siendo éstas acciones las que determinan el rendimiento. Un ejemplo de acciones de este tipo son los saltos. Este gesto deportivo esta correlacionado con la fuerza máxima, entendiendo que una mayor producción de fuerza permite una mayor generación de altura en dicho gesto. El objetivo de este trabajo es estudiar el efecto de entrenamiento de fuerza en sistema isoinercial sobre la mejora del Salto con Contramovimiento y analizar los cambios en la altura del mismo después de un programa de entrenamiento de 15 semanas, realizado sobre jóvenes futbolistas de élite. Los resultados obtenidos, muestran que no existen cambios significativos en esta variable de análisis (p< 0,05) por lo que se concluye que este tipo de entrenamiento con la duración especificada no tiene efectos sobre el rendimiento en la altura del salto (CMJ).Palabras clave: Entrenamiento Isoinercial, Futbolistas, Rendimiento, CMJ.Abstract: Soccer is a team sport where, to achieve success, players need of technical, tactical and physical skills, mainly intermittent character being such actions which determine the performance. An example of such actions is the jumpers. This sports actions is correlated with the maximal strength, understanding that force production allows greater height in this actions. The aim is to study the effects of strength training using a isoinertial device on Countermovement Jump ability and to analyze the changes in height after 15 weeks program training in young elite soccer players. There are no significant changes after to analyze the results (p< 0,05), so it is concluded that this type of training with certified duration has no effect on performance in height jump (CMJ).Keywords: Isoinertial Training, Soccers Players, Performance, CMJ.

scholarly journals Analyzing the Magnitude of Interlimb Asymmetries in Young Female Soccer Players: A Preliminary Study

2021 ◽  
Vol 18 (2) ◽  
pp. 475
Author(s):  
Javier Raya-González ◽  
Filipe Manuel Clemente ◽  
Daniel Castillo
Keyword(s):  
Range Of Motion ◽  
Muscle Mass ◽  
Injury Risk ◽  
Young Female ◽  
Asymmetry Index ◽  
Lower Limbs ◽  
Soccer Players ◽  
Countermovement Jump ◽  
Change Of Direction ◽  
Jump Ability

Although asymmetries in lower limbs have been linked with players’ performance in male soccer players, literature that has been published addressing female soccer is scarce. Thus, the aim of this study was twofold: (i) describe the asymmetries of women soccer players during jumping, change-of-direction and range-of-motion tests; and (ii) test possible relationships between asymmetries and injury risk in female soccer players. Sixteen female players (15.5 ± 1.5 years) performed a battery of fitness tests (i.e., jump ability, change-of-direction ability and passive range-of-motion) and muscle mass analysis via dual-energy X-ray absorptiometry, through which the specific asymmetry index and the related injury risk were calculated. Significant (p < 0.05) lower asymmetries in the change-of-direction test were observed in comparison to those observed in jumping and range-of-motion tests; significant (p < 0.05) lower asymmetries in muscle mass were also reported compared to those found in the change-of-direction and countermovement jump tests. Additionally, increased injury risk for countermovement jump and hip flexion with extended knee range-of-motion (relating to asymmetry values) and for ankle flexion with flexed knee range-of-motion in both legs (relating to reference range-of-motion values), as well as increased individual injury risk values, were observed across all tests. These findings suggest the necessity to implement individual approaches for asymmetry and injury risk analyses.

scholarly journals Evaluación y relación entre distintos parámetros de condición física en futbolistas semi profesionales (Evaluation and relationship among different fitness parameters in semi professional soccer players)

Retos ◽  
2015 ◽  
pp. 114-117
Author(s):  
Javier Yanci Irigoyen ◽  
Alberto García Huerta ◽  
Daniel Castillo Alvira ◽  
Luis Ángel Rivero Benito ◽  
Asier Los Arcos Larumbe
Keyword(s):  
Average Distance ◽  
T Test ◽  
Soccer Players ◽  
Arm Swing ◽  
Change Of Direction ◽  
Professional Soccer ◽  
Palabras Clave ◽  
Fitness Parameters ◽  
Cardiovascular Capacity ◽  
Jump Ability

Los objetivos de este estudio fueron, por un lado, evaluar la capacidad cardiovascular, el rendimiento en el sprint en línea recta, la capacidad de cambio de dirección (CODA) y el salto horizontal en jugadores de fútbol semi profesionales, y por otro, examinar la relación existente entre las distintas capacidades analizadas. En este estudio participaron 18 jugadores de fútbol semi profesionales (25.6 ± 4.8 años, 1.82 ± .1 m, 77.9 ± 7.1 kg, 23.6 ± 1.8 kg·m-2). El VO2max estimado obtenido en el test intermitente de resistencia Yo-Yo nivel 1 (YYIR1) fue de 51.70 ± 3.94 ml·kg-1·min-1. Los resultados en el sprint 5 m (SP5), 15 m (SP15) y en el Modified Agility T-test (MAT) fueron de 1.01 ± .05 s, 2.39 ± .10 s y 4.89 ± .23 s, respectivamente. En la capacidad de salto horizontal (SH) se obtuvo una distancia media de 1.97 ± .15 m para el salto con contra movimiento (HCMJ) y de 2.37 ± .16 m para el salto con contra movimiento con manos libres (HCMJAS). Se observaron correlaciones significativas y altas entre los valores de SP15 con el MAT (r = .757, p < .01) y con el HCMJ (r = -.749, p < .01). Debido a las altas correlaciones encontradas entre las distintas cualidades anaeróbicas, podría resultar interesante implementar entrenamientos específicos de salto horizontal en las rutinas de entrenamiento con el fin de mejorar el rendimiento en la capacidad de aceleración y la capacidad de cambiar de dirección de los futbolistas. Palabras clave: aceleración, agilidad, salto horizontal, resistencia, correlación, rendimiento.Abstract: The aims of this study were, first, to analyze cardiovascular capacity, performance in the straight sprint, change of direction ability (CODA) and horizontal jump ability in semi-professional soccer players, and secondly, to examine the relationship among the different abilities. This study involved 18 semi professional soccer players (25.6 ± 4.8 years, 1.82 ± .1 m, 77.9 ± 7.1 kg, 23.6 ± 1.8 kg·m-2). The estimated VO2max obtained in the Yo-Yo intermittent endurance level 1 test (YYIR1) was 51.70 ± 3.94 ml·kg-1·min-1. The results in the 5 m sprint (SP5), 15 m sprint (SP15) and Modified Agility T-test (MAT) were 1.01 ± .05 s, 2.39 ± .10 s and 4.89 ± .23 s, respectively. In the horizontal jump (HJ) an average distance of 1.97 ± .15 m for the countermovement jump (HCMJ) and 2.37 ± .16 m for the arm swing counter movement jump (HCMJAS) was obtained. Significant and high correlations between the values   of SP15 and MAT (r = 0.757, p < .01) and the HCMJ (r = -.749, p < .01) were observed. Correlations found among different anaerobic qualities, can lead us to think that it might be interesting to implement specific horizontal jump training routines to improve performance of sprint and change of direction abilities in soccer players.Key words: acceleration, agility, horizontal jump, endurance, correlation, performance.

EFFECTS OF EXPLOSIVE TYPE STRENGTH TRAINING ON FORCE PRODUCTION, SPRINT PERFORMANCE, ENDURANCE AND SERUM HORMONES IN SOCCER PLAYERS

2002 ◽  
Vol 34 (5) ◽  
pp. S125
Author(s):  
E M. Gorostiaga ◽  
M Izquierdo ◽  
M Ruesta ◽  
J Iribarren ◽  
J J. Gonz??lez-Badillo ◽  
...  
Keyword(s):  
Strength Training ◽  
Force Production ◽  
Sprint Performance ◽  
Soccer Players ◽  
Serum Hormones

scholarly journals Corticomuscular Coherence and Motor Control Adaptations after Isometric Maximal Strength Training

2021 ◽  
Vol 11 (2) ◽  
pp. 254
Author(s):  
Dimitri Elie ◽  
Franck Barbier ◽  
Ghassan Ido ◽  
Sylvain Cremoux
Keyword(s):  
Motor Control ◽  
Strength Training ◽  
Muscle Activation ◽  
Force Production ◽  
Maximal Strength ◽  
Antagonist Muscle ◽  
Corticomuscular Coherence ◽  
Muscle Activations ◽  
Stability And Accuracy ◽  
Over Time

Strength training (ST) induces corticomuscular adaptations leading to enhanced strength. ST alters the agonist and antagonist muscle activations, which changes the motor control, i.e., force production stability and accuracy. This study evaluated the alteration of corticomuscular communication and motor control through the quantification of corticomuscular coherence (CMC) and absolute (AE) and variable error (VE) of the force production throughout a 3 week Maximal Strength Training (MST) intervention specifically designed to strengthen ankle plantarflexion (PF). Evaluation sessions with electroencephalography, electromyography, and torque recordings were conducted pre-training, 1 week after the training initiation, then post-training. Training effect was evaluated over the maximal voluntary isometric contractions (MVIC), the submaximal torque production, AE and VE, muscle activation, and CMC changes during submaximal contractions at 20% of the initial and daily MVIC. MVIC increased significantly throughout the training completion. For submaximal contractions, agonist muscle activation decreased over time only for the initial torque level while antagonist muscle activation, AE, and VE decreased over time for each torque level. CMC remained unaltered by the MST. Our results revealed that neurophysiological adaptations are noticeable as soon as 1 week post-training. However, CMC remained unaltered by MST, suggesting that central motor adaptations may take longer to be translated into CMC alteration.

scholarly journals Association Between Endocrine Markers, Accumulated Workload, and Fitness Parameters During a Season in Elite Young Soccer Players

2021 ◽  
Vol 12 ◽  
Author(s):  
Hadi Nobari ◽  
Elena Mainer-Pardos ◽  
José Carmelo Adsuar ◽  
Juan Manuel Franco-García ◽  
Jorge Rojo-Ramos ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Regression Analysis ◽  
Growth Factor ◽  
Oxygen Uptake ◽  
Soccer Players ◽  
Maximal Strength ◽  
Countermovement Jump ◽  
Youth Soccer ◽  
Fitness Parameters ◽  
Physical Capacities

The purpose of this study was to analyze differences between endocrine markers in soccer players, based on playing positions, and correlations between endocrine markers (testosterone, cortisol, growth hormone, and insulin-like growth factor-1), with accumulated workload training and fitness parameters [maximal oxygen uptake (VO2max), countermovement jump (CMJ), and isometric maximal strength (1-RM) of the knee for hamstring (ISH) and quadriceps (ISQ) muscles] during early-, mid-, and end-seasons. Twenty-four elite soccer players under 17 participated in this study. The results showed that there was no difference between levels of the endocrine markers among the different positions of the players. Significant correlations were observed between endocrines parameters and fitness performance (ISQ, ISH, VO2max, and CMJ). Regression analysis showed that 1-RM and VO2max were the best predictors of endocrine markers. These findings demonstrated that the activity profiles of youth soccer players were not influenced by endocrine markers. Also, it may be assumed that endocrines levels can be used to better explain the physical capacities of this population. Finally, endocrines markers may help to predict changes in 1-RM and VO2max.

scholarly journals Cambios en la fuerza de miembros inferiores tras un mesociclo de pretemporada en futbolistas semiprofesionales (Changes in leg muscle strength after a pre-season mesocycle in semiprofessional soccer players)

Retos ◽  
2015 ◽  
pp. 52-55
Author(s):  
Cristina González-Millán ◽  
Juan Del Coso ◽  
Javier Abián-Vicén ◽  
Roberto López del Campo ◽  
Diego Gutiérrez ◽  
...  
Keyword(s):  
Strength Training ◽  
Muscle Force ◽  
Muscle Power ◽  
Soccer Players ◽  
Lower Body ◽  
Jump Performance ◽  
Before And After ◽  
Leg Muscle ◽  
Jump Ability ◽  
Leg Muscle Power

Objetivo. El objetivo del estudio fue analizar los efectos de un mesociclo de pretemporada que incluía un entrenamiento de fuerza en la capacidad de salto y la fuerza y potencia del tren inferior.  Material y método. En el estudio participaron ocho futbolistas semi profesionales pertenecientes a un equipo filial de un equipo de élite. Realizaron un mesociclo de pretemporada que incluía un entrenamiento de fuerza una vez a la semana durante once semanas. Antes y después de la pretemporada se midió la altura de salto en un salto con contramovimiento (CMJ) en una plataforma de contacto,  se calculó el peso máximo con el que podían realizar una repetición completa en semi sentadilla (1RM) y se midió la potencia muscular desarrollada en este ejercicio con diferentes porcentajes de carga (Pot1=30% 1RM, Pot2= 44% 1RM, Pot3= 58% 1RM, Pot4= 72% 1RM) a través de un encoder rotatorio. Resultados. La potencia muscular se incrementó en las cuatro cargas (Pot 1 de 785±106 a 1010±143 W; p<0.05. Pot 2: de 1081±165 a 1295±198 W; p<0.05. Pot 3: de 1208±216 a 1407±205 W;p<0.05. Pot 4: de 1304±212 a 1576±406 W; p<0.05) y se incrementó el 1RM (de 125±11.7 kg; a 159±11.1 kg; p<0.05) tras el mesociclo de pretemporada. No se produjeron mejoras en la capacidad de salto (p>0.05).  Conclusiones. Tras un mesociclo de pretemporada que incluía un entrenamiento semanal de fuerza, se producen  mejoras en el 1RM y en la potencia en media sentadilla, pero estos aumentos de fuerza en miembros inferiores no produjeron una mejora en la capacidad de salto. Palabras clave: fútbol, pretemporada, fuerza, potencia, salto.Abstract: Purpose. The aim of this study was to analyze the effects of a preseason strength training mesocyle on jump performance and leg muscle force and power. Methods. Eight semiprofessional soccer players of the same elite soccer team participated in the study. The preseason strength training mesocycle consisted of lower body weightlifting exercises once a week during eleven weeks. Before and after the preseason mesocycle, jump height was measured by using a countermovement jump (CMJ) on a contact platform.  In addition, before and after the mesocycle, one-repetition maximum (1RM) in half-squat exercise was measured and the leg muscle power generated at different percentages of 1RM (Pot1=30% 1RM, Pot2= 44% 1RM, Pot3= 58% 1RM, Pot4= 72% 1RM) was measured by using a rotatory encoder.  Results. After the strength training mesocycle, leg muscle power increased at Pot 1 (from785±106 to 1010±143 W; p<0.05), Pot 2 (1081±165 to 1295±198 W;p<0.05), Pot 3 (1208±216 to 1407±205 W; p<0.05) and at (Pot 4: 1304±212 to 1576±406 W; p<0.05).  Half-squat 1RM was also increased after the training mesocycle (125±11.7 kg; to 159±11.1 kg; p<0.05). However, there were no improvements in the jump ability after the training (p>0.05). Conclusions. A preseason strength training mesocycle with lower body weightlifting exercises once a week improved half-squat 1RM and leg muscle power.  However, these leg muscle force enhancements did not translated into an improved jump ability.Key words: soccer, preseason, strength, power, jump.

scholarly journals Changes in jump and sprint performances during 14 preseasons in a Spanish reserve elite soccer team

Kinesiology ◽  
2020 ◽  
Vol 52 (2) ◽  
pp. 224-231
Author(s):  
Asier Los Arcos ◽  
Raúl Martínez-Santos ◽  
Filipe M. Clemente ◽  
Daniel Castillo
Keyword(s):  
Effect Size ◽  
Performance Level ◽  
Soccer Players ◽  
Countermovement Jump ◽  
Training Process ◽  
Strength And Conditioning ◽  
Young Professional ◽  
Professional Soccer ◽  
Soccer Team ◽  
Jump Ability

The aim of this study was to assess the changes in jump and sprint performances after the preseason period across 14 seasons depending on the initial performance level and the playing position in young professional soccer players. In total, 162 soccer players (age = 20.6 ± 1.8 years) belonging to the same reserve team of a Spanish La Liga club participated in this study. Countermovement jump (CMJ) and 5 and 15 m sprints were assessed in each season at the start of the preseason (July), Test 1 (T1), and the start of the competitive period (September), Test 2 (T2), from the 1998 to 2013 seasons. Considering all seasons, a trivial change was found in the sprint (5 m, Effect Size [ES] = −0.01; ±0.11, most-likely; and 15 m, ES = 0.05; ±0.09, most-likely) and countermovement jump (CMJ) performances (ES = −0.03; ±0.07; most-likely) after the preseason, but this varied across the seasons. While the fastest players in 5 m and 15 m tests and the most powerful worsened their performances in sprinting capacity (ES = 0.53–0.65, small very-likely) and in jump ability (ES = −0.54; ±0.25, small very-likely), respectively, the slowest players and the less powerful improved their performance likely/most-likely (ES = −0.33 and −0.68, small and moderate) and very-likely (ES = 0.40; ±0.20, small) after the precompetitive period. The changes in CMJ and sprinting were trivial and trivial/small for all tactical positions. The changes in neuromuscular performance after the preseason were not stable across the seasons and varied depending on the initial performance level. Individualization strategies should be considered in the design of strength and conditioning programs in order to optimize the training process.

scholarly journals Maximal strength training-induced increase in efferent neural drive is not reflected in relative protein expression of SERCA

2021 ◽  
Author(s):  
Tiril Tøien ◽  
Håvard Haglo ◽  
Stian Kwak Nyberg ◽  
Shalini Vasudev Rao ◽  
Astrid Kamilla Stunes ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Protein Expression ◽  
Strength Training ◽  
High Intensity ◽  
Force Production ◽  
H Reflex ◽  
Maximal Strength ◽  
Neural Drive ◽  
M Wave ◽  
Neural Adaptations

Abstract Introduction Maximal strength training (MST), performed with heavy loads (~ 90% of one repetition maximum; 1RM) and few repetitions, yields large improvements in efferent neural drive, skeletal muscle force production, and skeletal muscle efficiency. However, it is elusive whether neural adaptations following such high intensity strength training may be accompanied by alterations in energy-demanding muscular factors. Methods Sixteen healthy young males (24 ± 4 years) were randomized to MST 3 times per week for 8 weeks (n = 8), or a control group (CG; n = 8). Measurements included 1RM and rate of force development (RFD), and evoked potentials recordings (V-wave and H-reflex normalized to M-wave (M) in the soleus muscle) applied to assess efferent neural drive to maximally contracting skeletal muscle. Biopsies were obtained from vastus lateralis and analyzed by western blots and real-time PCR to investigate the relative protein expression and mRNA expression of Sarcoplasmic Reticulum Ca2+ ATPase (SERCA) 1 and SERCA2. Results Significant improvements in 1RM (17 ± 9%; p < 0.001) and early (0–100 ms), late (0–200 ms) and maximal RFD (31–53%; p < 0.01) were observed after MST, accompanied by increased maximal Vmax/Msup-ratio (9 ± 14%; p = 0.046), with no change in H-reflex to M-wave ratio. No changes were observed in the CG. No pre- to post-training differences were found in mRNA or protein expressions of SERCA1 and SERCA2 in either group. Conclusion MST increased efferent neural drive to maximally contracting skeletal muscle, causing improved force production. No change was observed in SERCA expression, indicating that responses to high intensity strength training may predominantly be governed by neural adaptations.

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