scholarly journals Examination of the Sprinting and Jumping Force-Velocity Profiles in Young Soccer Players at Different Maturational Stages

2021 ◽  
Vol 18 (9) ◽  
pp. 4646
Author(s):  
Luis Miguel Fernández-Galván ◽  
Daniel Boullosa ◽  
Pedro Jiménez-Reyes ◽  
Víctor Cuadrado-Peñafiel ◽  
Arturo Casado
Keyword(s):  
Linear Regression ◽  
Vertical Jump ◽  
Soccer Players ◽  
Chronological Age ◽  
Regression Analyses ◽  
Training Process ◽  
Maximal Power ◽  
Training Experience ◽  
Force Velocity ◽  
And Training

The aim was to determine the relationships among components of the force-velocity (F-V) profiles in jumping and sprinting, with both biological and chronological ages in 89 young soccer players belonging to categories from U10 to U18. Participants performed countermovement jumps (CMJ) and 20-m sprint tests. F-V components assessed were associated with both maturity offset and chronological age, using correlation and multiple linear regression analyses. Horizontal (i.e., maximal theoretical force [F0] and velocity [V0], maximal power [Pmax] and F-V slope) and vertical (i.e., [F0] and [Pmax]) F-V components displayed very large correlations (i.e., 0.79 ≤ r ≤ 0.92) with both chronological age and maturity offset. The combination of sprinting Pmax and training experience and jumping F0 and training experience explained up to 94% of the variances in maturity offset and chronological age. Furthermore, similar correlations were found between sprinting and jumping performances, and components of the F-V profiles, and both maturity offset and chronological age. Identification of vertical jump and sprint mechanical determinants may assist in strengthening those components of the F-V profile which are weaker throughout the training process. Sprinting and jumping capabilities can be indistinctly monitored with respect to their chronological age or maturity offset in young soccer players.

scholarly journals Associations between Physical Status and Training Load in Women Soccer Players

2021 ◽  
Vol 18 (19) ◽  
pp. 10015
Author(s):  
Lillian Gonçalves ◽  
Filipe Manuel Clemente ◽  
Joel Ignacio Barrera ◽  
Hugo Sarmento ◽  
Gibson Moreira Praça ◽  
...  
Keyword(s):  
Perceived Exertion ◽  
Vertical Jump ◽  
Training Load ◽  
Rating Of Perceived Exertion ◽  
Soccer Players ◽  
Load Range ◽  
Change Of Direction ◽  
Fitness Assessment ◽  
Cohort Design ◽  
And Training

This study aimed to analyze the variations of fitness status, as well as test the relationships between accumulated training load and fitness changes in women soccer players. This study followed an observational analytic cohort design. Observations were conducted over 23 consecutive weeks (from the preseason to the midseason). Twenty-two women soccer players from the same first Portuguese league team (22.7 ± 5.21 years old) took part in the study. The fitness assessment included anthropometry, hip adductor and abductor strength, vertical jump, change of direction, linear speed, repeated sprint ability, and the Yo-Yo intermittent recovery test. The training load was monitored daily using session rating of perceived exertion (s-RPE). A one-way repeated ANOVA revealed no significant differences for any of the variables analyzed across the three moments of fitness assessments (p > 0.05). The t-test also revealed no differences in the training load across the moments of the season (t = 1.216; p = 0.235). No significant correlations were found between fitness levels and accumulated training load (range: r = 0.023 to −0.447; p > 0.05). This study revealed no differences in the fitness status during the analyzed season, and the fitness status had no significant relationship with accumulated training load.

scholarly journals Kepemimpinan, Insentif dan Pelatihan Terhadap Kinerja Karyawan Pada Kantor Bank Syariah Mandiri Cabang Pematang Siantar

2020 ◽  
Vol 17 (2) ◽  
pp. 224
Author(s):  
Sugeng Sukoco ◽  
Satria Tirtayasa ◽  
Hazmanan Khair Pasaribu
Keyword(s):  
Data Analysis ◽  
Linear Regression ◽  
Data Collection ◽  
Employee Performance ◽  
Coefficient Of Determination ◽  
Regression Analyses ◽  
Analysis Techniques ◽  
Performance Training ◽  
Simultaneous Testing ◽  
And Training

ABSTRACTThe purpose of this research is to know the leadership, incentives and training on the performance of employees at Bank Syariah Mandiri Pematangsiantar Branch. The population in this study is the population in this study is the employees who are in the office of Bank Syariah Mandiri Pematangsiantar Branch as much as 40 people.. The sample is used as many as 40 employees in Bank Syariah Mandiri Office, Pematangsiantar, amounting to 40 people. The data collection techniques in this study are documentation and poll list. Data analysis techniques using multiple linear regression analyses, classical assumption Test T, Test f and coefficient of determination. Data processing in this study uses the program SPSS 22.00 for Windows Software. Based on the results of the research conducted, the partial leadership testing has significant effect on employee performance. Incentive partial testing has significant effect on employee performance. Training partial testing has significant effect on employee performance. Simultaneous testing of leadership influences, incentives and training significantly affects employee performance.

scholarly journals Validation of a Photoplethysmographic Heart Rate Monitor: Polar OH1

2019 ◽  
Vol 40 (07) ◽  
pp. 462-467 ◽  
Author(s):  
Eric Hermand ◽  
Johan Cassirame ◽  
Gaël Ennequin ◽  
Olivier Hue
Keyword(s):  
Heart Rate ◽  
Linear Regression ◽  
Skin Tone ◽  
Test Accuracy ◽  
Regression Analyses ◽  
Limits Of Agreement ◽  
Endurance Sports ◽  
Heart Rate Monitor ◽  
And Training ◽  
Assess Data Quality

AbstractThis study assessed the validity of a photoplethysmographic heart rate (HR) monitor, the Polar OH1 in various sports performed in ecological conditions: running, cycling, soccer, kayaking, walking, tennis and fitness. Seventy trained athletes (56 males, 14 females) wore the Polar OH1 armband and the H7 chest belt during training. A total of 390 h and 38 min of recording were compared using a 20-bpm window to assess data quality, and Bland-Altman agreements and ICC analyses were used to test accuracy. Linear regression analyses evaluated the HR accuracy and correlation with skin tone. Training loads (TRIMPs) were compared for each session. Reliability was high for endurance sports (>99%) and lower for sports involving arm movements (92~95%). Biases were slightly negative for all sports, whereas widths of limits of agreement varied from 7–20bpm. Bland-Altman agreements were all under 5% except tennis, kayak and fitness. HR accuracy was positively correlated to skin tone (p<0.05). Finally, TRIMPs from the OH1 device were inferior to criterion’s (except walking and soccer), within a 3% range from reference. Hence, OH1 represents a valid tool to monitor instantaneous HR and training load, especially for endurance sports.

Differences in Sprint Mechanical Force–Velocity Profile Between Trained Soccer and Futsal Players

2019 ◽  
Vol 14 (4) ◽  
pp. 478-485 ◽  
Author(s):  
Pedro Jiménez-Reyes ◽  
Amador García-Ramos ◽  
Victor Cuadrado-Peñafiel ◽  
Juan A. Párraga-Montilla ◽  
José A. Morcillo-Losa ◽  
...  
Keyword(s):  
Velocity Profile ◽  
Testing Procedure ◽  
Mechanical Force ◽  
Resultant Force ◽  
Soccer Players ◽  
Maximal Power ◽  
Time Data ◽  
Force Velocity ◽  
High Level ◽  
Different Levels

Purpose: To compare the sprint mechanical force–velocity (F–V) profile between soccer and futsal players. A secondary aim was, within each sport, to study the differences in sprint mechanical F–V profile between sexes and players of different levels. Methods: A total of 102 soccer players (63 men) and 77 futsal players (49 men) who were competing from the elite to amateur levels in the Spanish league participated in this investigation. The testing procedure consisted of 3 unloaded maximal 40-m sprints. The velocity–time data recorded by a radar device were used to calculate the variables of the sprint acceleration F–V profile (maximal theoretical force [F0], maximal theoretical velocity [V0], maximal power [Pmax], decrease in the ratio of horizontal to resultant force [DRF], and maximal ratio of horizontal to resultant force [RFpeak]). Results: Futsal players showed a higher F0 than soccer players (effect size [ES] range: 0.11–0.74), while V0 (ES range: −0.48 to −1.15) and DRF (ES range: −0.75 to −1.45) was higher for soccer players. No significant differences were observed between soccer and futsal players for Pmax (ES range: −0.43 to 0.19) and RFpeak (ES range: −0.49 to 0.30). Men and high-level players presented an overall enhanced F–V profile compared with women and their lower-level counterparts, respectively. Conclusions: The higher F0 and lower V0 of futsal players could be caused by the game’s specific demands (larger number of accelerations but over shorter distances than in soccer). These results show that the sprint mechanical F–V profile is able to distinguish between soccer and futsal players.

scholarly journals Possibilidades e potencialidades técnico-táticas em diferentes tradicionais jogos/brincadeiras de bola com os pés (Technical-tactics possibilities and potentialities in different traditional ball games played with feet) (Posibilidades y potencialidades

Retos ◽  
2020 ◽  
pp. 312-317
Author(s):  
Alcides José Scaglia ◽  
Vitor Hugo Silva Costa ◽  
João Bosco Júnior ◽  
Milton Shoiti Misuta ◽  
João Cláudio Machado
Keyword(s):  
University Students ◽  
Soccer Players ◽  
Training Process ◽  
Organizational Process ◽  
Organization Process ◽  
Brazilian Culture ◽  
And Training ◽  
Estudiantes Universitarios

Resumo. O estudo tem como objetivo investigar as possibilidades e diferentes potencialidades dos jogos que compõem a cultura tradicional brasileira de brincadeiras de bola com os pés. Participaram do estudo 28 futebolistas, sendo 14 crianças (Grupo 01: 9,7±1,2 anos) e 14 universitários (Grupo 02: 21,1±1,7 anos). Os jogadores participaram de três jogos/brincadeiras de bola com os pés (Rebatida, Bobinho e Artilheiro). O desempenho dos jogadores foi analisado através do software Dvideow®, que registrou as ações técnico-táticas realizadas por ambos grupos. Foi possível constatar que cada um dos jogos/brincadeiras de bola com os pés investigados, em meio ao seu processo de organização, apresentam as mesmas possibilidades técnico-táticas, independentemente do grupo a jogar, ao mesmo tempo em que estes díspares jogos proporcionaram diferentes potencialidades técnico-táticas. Portanto, o entendimento do processo de organizacional sistêmico dos jogos/brincadeiras de bola com os pés demonstra ser conhecimento fundamental para o treinador planejar e conduzir sessões de treino representativas e desafiadoras. O conhecimento sobre as possibilidades e potencialidades dos diversos jogos/brincadeiras de bola com os pés, pertencentes à cultura do nosso futebol de rua, permitem aos treinadores implementar e acompanhar um processo de ensino centrado no aluno, pautado no jogo e inspirado na pedagogia da rua. Abstract. This study aimed to investigate the possibilities and potentialities of different games which compose the traditional Brazilian culture of playing ball games with feet, highlighting its systemic organizational process. Twenty-eight male soccer players participated in the study, being 14 children (Group 01: 9,7±1,2 years) and 14 university students (Group 02: 21,1±1,7 years). The players performed three games played with their feet (Rebatida, Bobinho and Artilheiro). The players' performance was analyzed using the Dvideow® software, which recorded the technical-tactical actions performed by both groups. It was possible to highlight that each of the game investigated, respecting their own organization process, presented the same technical-tactical possibilities, regardless of the group of players, at the same time that these disparate games provided different technical-tactical potentialities. Therefore, understanding the systemic organizational process of ball games played with the feet proves to be extremely important for coaches' better plan and conduct representative and challenging training sessions. The knowledge about the possibilities and potentialities of several small games, belonging to the culture of our street football, allow coaches to implement and monitor a player-centered and game-based teaching and training process, inspired by street pedagogy. Resumen. El estudio tiene como objetivo investigar las posibilidades y el potencial de los diferentes juegos que conforman la cultura tradicional brasileña de jugar a la pelota con los pies, destacando su proceso organizativo sistémico. Participaron en el estudio 28 jugadores de fútbol, siendo 14 niños (Grupo 01: 9,7±1,2 años) y 14 estudiantes universitarios (Grupo 02: 21,1±1,7 years). Los jugadores participaron en tres juegos de pelota con los pies (Rebatida, Rondo and Artilheiro). El rendimiento de los jugadores se analizó utilizando el software Dvideow®, que registró las acciones técnico-tácticas realizadas por ambos grupos. Fue posible verificar que cada uno de los juegos investigados, en el medio de su proceso de organización, presenta las mismas posibilidades técnico-tácticas, independientemente del grupo de jugadores, al mismo tiempo que estos juegos dispares proporcionaban diferentes potencialidades técnico-tácticas. Por lo tanto, la comprensión del proceso organizativo sistémico de los juegos de pelota con los pies demuestra ser un conocimiento fundamental para que el entrenador planifique y realice sesiones de entrenamiento representativas y desafiantes. El conocimiento sobre las posibilidades y el potencial de los diversos juegos de pelota con los pies, pertenecientes a la cultura de nuestro fútbol callejero, permiten a los entrenadores implementar y monitorear un proceso de enseñanza centrado en el alumno, basado en el juego e inspirado en la pedagogía callejera.

scholarly journals Coaches’ and Young soccer players' training load perceptions during different training phases

2019 ◽  
Author(s):  
Diogo Hilgemberg Figueiredo ◽  
Diego Hilgemberg Figueiredo ◽  
Francisco De Assis Manoel ◽  
Helcio Rossi Gonçalves ◽  
Antonio Carlos Dourado
Keyword(s):  
Linear Regression ◽  
Perceived Exertion ◽  
Training Session ◽  
Training Load ◽  
Rating Of Perceived Exertion ◽  
Soccer Players ◽  
Training Period ◽  
Stepwise Linear Regression ◽  
Large Correlation ◽  
And Training

Objective: To our Knowledge, information about the agreement between coaches’ and the young soccer players’ session rating of perceived exertion is not consistent during specific periods of training (intensification and taper) and has not been established. The purpose of this study was to examine and compare the internal training load and session rating of perceived exertion between coaches’ and young soccer players’ during three weeks in different training phases. Method: Participants were 16 male elite Under19 soccer players and their coaches. Before each training session, the coaches reported a session rating of perceived exertion using the Borg CR-10 scale as well as the planned duration (min) of the training based on prior planning, while the athletes responded the scale after each training session. Results: No differences in intensity session rating of perceived exertion (t = 0.49; p = 0.62) and training load (t = 0.18; p = 0.86) were observed between coaches and players during the training period analyzed. During different training phases, no significant differences were found during intensification (t = 0.18; p = 0.85) and taper (t = -0.19; p = 0.85) in training loads and in the session rating of perceived exertion prescribed by coaches and perceived by players. A very large correlation was observed between coaches training load (r= 0.84) and players training load. However, a trivial correlation was found between players training load and changes in the Yo-yo IR1 performance (r= -0.09), age (r= -0.06) and years of competitive experience (r= -0.08). Stepwise linear regression revealed that coaches training load (F1; 238= 582.7; R2= 0.710; p<0.001) explained 71% of the variance in players training load. Conclusion: The results suggest that the session rating of perceived exertion and training load prescribed during three weeks in different training phases (by coaches) was not different from perceived by young soccer players. Moreover, coaches training load seem to be effective to predict the training load in soccer players.

scholarly journals Vertical Force-velocity Profiling and Relationship to Sprinting in Elite Female Soccer Players

2021 ◽  
Author(s):  
Sarah A. Manson ◽  
Cody Low ◽  
Hayley Legg ◽  
Stephen D. Patterson ◽  
César Meylan
Keyword(s):  
Velocity Profile ◽  
Power Output ◽  
Soccer Players ◽  
Maximal Velocity ◽  
Vertical Force ◽  
Maximal Power ◽  
Maximal Power Output ◽  
Sprint Speed ◽  
Back Squat ◽  
Force Velocity

AbstractExplosive actions are integral to soccer performance and highly influenced by the ability to generate maximal power. The purpose of this study was to investigate the relationship between force-velocity profile, jump performance, acceleration and maximal sprint speed in elite female soccer players. Thirty-nine international female soccer players (24.3±4.7 years) performed 40-m sprints, maximal countermovement jumps and five loaded squat jumps at increasing loads to determine individual force-velocity profiles. Theoretical maximal velocity, theoretical maximal force, maximal power output, one repetition maximal back squat and one repetition maximal back squat relative to body mass were determined using the force-velocity profile. Counter movement jump, squat jump and maximal power output demonstrated moderate to large correlation with acceleration and maximal sprint speed (r=− 0.32 to −0.44 and −0.32 to −0.67 respectively, p<0.05). Theoretical maximal velocity and force, one repetition maximal and relative back squat demonstrated a trivial to small relationship to acceleration and maximal sprint speed (p>0.05). Vertical force-velocity profiling and maximal strength can provide valuable insight into the neuromuscular qualities of an athlete to individualize training, but the ability to produce force, maximal power, and further transference into sprint performance, must be central to program design.

scholarly journals IDENTIFICATION OF PHYSICAL FITNESS TESTS FOR BASKETBALL PLAYERS

2020 ◽  
Vol 20 (S1) ◽  
pp. 46-54
Author(s):  
A Vavilov ◽  
O Anfilatova ◽  
A Laptev ◽  
Ya Sirakovskaya
Keyword(s):  
Physical Fitness ◽  
Vertical Jump ◽  
Practical Interest ◽  
Educational Process ◽  
State University ◽  
Training Process ◽  
Basketball Players ◽  
Fitness Tests ◽  
Explosive Force ◽  
And Training

Aim. The paper aims to study the factor structure of physical fitness in basketball players and identify tests for a qualitative and quantitative assessment of their skills. Materials and methods. The study was conducted from September 2017 to May 2018 at Vyatka State University, Kirov. Fifty-three students were examined, all of them participated in the University Basketball Championship. A theoretical analysis of scientific literature sources and a pedagogical experiment were conducted. Mathematical statistics and pedagogical testing were used as methods. Results. Twelve tests were selected and checked for reliability that influenced most the physical fitness of basketball players in terms of strength, speed, jumping ability. Three hypothetical latent factors were identified that optimally determined the combination of these tests: “jumping ability / speed”, “explosive force/endurance”, and “strength”. Using factor analysis and an intercorrelation matrix, the most informative physical fitness tests were identified: standing vertical jump, 20 m shuttle run, pull-ups, which are used in the educational and training process of basketball players. Conclusion. The data obtained from the pedagogical experiment are of practical interest, primarily for trainers and university teachers. These tests do not require expensive equipment and can be performed in a gym, at the same time being the most informative in a limited time, which is typical for the educational and training process of students. This approach increases the efficiency of classes and optimizes the educational process. A comprehensive assessment of students will make it possible to track their health and physical fitness. Such data will allow adjusting the training process in the most effective way.

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