scholarly journals The effects of neuromuscular performance and perceptual parameters in futsal athletes playing consecutive games

2020 ◽  
Vol 19 (4) ◽  
pp. 292
Author(s):  
Cristiane Blausius Salvi Hübner ◽  
Cristiano André Hübner ◽  
Martim Gomes Weber ◽  
Fernando De Souza Campos ◽  
Renan Felipe Hartmann Nunes ◽  
...  
Keyword(s):  
Outcomes Research ◽  
Perceived Exertion ◽  
Vertical Jump ◽  
Team Sports ◽  
Rating Of Perceived Exertion ◽  
Test Results ◽  
Countermovement Jump ◽  
Squat Jump ◽  
Neuromuscular Performance ◽  
Jump Test

The present study aims to analyze the effects of consecutive futsal games on neuromuscular performance and rating of perceived exertion in athletes. Fourteen male futsal players (16.5 ± 0.51 years, 67.5 ± 11.1 kg; 1.73 ± 0.08 cm; 22.5 ± 2.3kg/m²) from a youth futsal team took part at the study. Our research monitored the team throughout the 4-day qualifying phase of the Campeonato Paranaense de Futsal (the Youth Futsal Championship of the State of Paraná, Brazil). The athletes underwent the following tests immediately after each futsal match: vertical jump test (Squat Jump (SJ)), Countermovement Jump test (CMJ), and a rating of perceived exertion (s-RPE) session. Magnitude based inference analysis reported CMJ values likely lower after the 2nd match when compared with the results obtained after the 1st and 4th matches: (ES= -0.46 low) and (ES= -0.53 moderate), respectively. Furthermore, SJ values reported after the 2nd match are likely lower if compared with the outcomes obtained after the 1st match (ES= -0.56 moderate) and possibly lower when compared with the 3rd matches (ES= -0.45 low). PSE results were significantly different comparing the 1st and 2nd matches (p=0.04); the 1st and 3rd matches (p=0.01); and the 3rd and 4th matches (p=0.01). Moreover, the outcomes research obtained after the 1st match are very likely to be lower when compared with the results from the 2nd (ES= -0.97 high) and 3rd matches (ES= high); and almost certain lower when compared with the 2nd and 3rd matches (ES= -0.45 low). Test results research obtained after the 4th match are very likely to be lower than the ones from the 2nd (EF=-0.83 high) and 3rd matches (ES= 1.01 high). Thus, by investigating the youth futsal tournament, the study could observe under-17 athletes delivered a decreased performance in vertical jump tests throughout the 4-consecutive-day championship, which can be associated with an increased rating of perceived exertion.Keywords: team sports, physical performance, fatigue, muscle damage.

scholarly journals Explosive Strength of Lower Limbs in 10 – 12 Years Old Athletes of Individual Sports

2020 ◽  
Vol 60 (1) ◽  
pp. 94-104
Author(s):  
Daniela Leütterová ◽  
Petra Tomková ◽  
Dalibor Dzugas ◽  
Peter Kačúr ◽  
Pablo Prieto Gonzalez
Keyword(s):  
Vertical Jump ◽  
Lower Limbs ◽  
Statistical Characteristics ◽  
Strength Development ◽  
Countermovement Jump ◽  
Squat Jump ◽  
Explosive Strength ◽  
Jump Test ◽  
Student’S T ◽  
Individual Sports

SummaryThe aim of the study was to determine the levels of lower limb explosive strength of girls in different sport specialization. The sample consisted of 24 girls in aerobic gymnastics (n = 12) and athletic (n = 12) aged 10 to 12 years. To assess the levels of girls’ lower limbs explosive strength, we administered the following tests: countermovement jump test, countermovement jump with free arms test, squat jump test, 10-seconds repetitive jumping test. Testing sessions took place in September 2019. To obtain data about the levels of lower limbs explosive strength, we recorded step height (cm) and duration of the flight phase (s). Data about the lower limbs explosive strength were collected using the Optogait system for optical detection. We applied basic statistical characteristics, namely Student’s t-test and multivariate linear regression. There were no significant differences between girls in aerobic gymnastics and athletics. We recorded better test results in the group of girl’s athletes in the countermovement jump, countermovement jump with free arms and squat jump. In the group of girl’s involved in aerobic gymnastics, we recorded better results in the 10-second repetitive vertical jumping and vertical jump strength. According to the collected data, we may conclude that the training process of the selected girls in terms of explosive strength development is significantly different. Girls involved in aerobic gymnastics showed a higher level of performance in the 10-second vertical jump, which results from the structure of sport specificity.

scholarly journals Relationship between body composition, Yo-Yo intermittent recovery test and vertical jump test in elite young soccer players

2021 ◽  
Author(s):  
Erkan Akdoğan ◽  
Süleyman Olgun
Keyword(s):  
Body Composition ◽  
Pearson Correlation ◽  
Vertical Jump ◽  
Soccer Players ◽  
Countermovement Jump ◽  
Jump Performance ◽  
Squat Jump ◽  
Recovery Test ◽  
Jump Test ◽  
Regional Body Composition

Objective: The aim of this study is to find out the relationships among body composition, Yo-Yo intermittent recovery (IR) test and vertical jump test in elite young soccer players. Material and Methods: Eighteen healthy young male soccer players (Age: 16.5±0.3 years, height: 178.0±5.9 cm, body weight: 65.9±7.9kg,) voluntarily participated in the study. Total and regional body composition parameters of the soccer players were examined through a dual-energy x-ray absorptiometry (DEXA) method. Vertical jump performance tests were squat jump (SJ) and active jump (AJ), and endurance performances were determined by the Yo-Yo intermittent recovery level 1 test (Yo-Yo IR1). Relationships among body composition, Yo-Yo intermittent recovery test and vertical jump test were analyzed with Pearson Correlation coefficient. Significance level was taken as ≤0.05. Results: A statistically significant negative correlation was found between squat jump and countermovement jump (r=-0.588, r=-0.573, p<0.05), and the leg fat rate. However, there were no statistically significant relationship among squat jump, Yo-Yo IR1 and countermovement jump and other whole/regional body composition (p>0.05). Conclusion: Changes in body composition are important issues for the physical performance level of young soccer players, as local excess body fat may cause deterioration, especially in jumping performance.

scholarly journals Transcranial Direct Current Stimulation Decreases the Decline of Speed during Repeated Sprinting in Basketball Athletes

2021 ◽  
Vol 18 (13) ◽  
pp. 6967
Author(s):  
Che-Hsiu Chen ◽  
Yu-Chun Chen ◽  
Ren-Shiang Jiang ◽  
Lok-Yin Lo ◽  
I-Lin Wang ◽  
...  
Keyword(s):  
Heart Rate ◽  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Perceived Exertion ◽  
Rating Of Perceived Exertion ◽  
Fatigue Index ◽  
Countermovement Jump ◽  
Basketball Players ◽  
Jump Performance ◽  
Jump Test

The purpose of this study was to determine whether transcranial direct current stimulation (tDCS) can improve countermovement jump performance, fatigue index and alleviate the speed decline during repeated shuttle sprints in trained basketball players. Thirteen trained basketball players were divided into the tDCS trial and sham trial by the random crossover design. The tDCS trial was stimulated with 2-mA current in the M1 area in the middle of the top of the head for 20 min. For the sham trial, the current was turned off after 5 s, stopping the electrical stimulation. After warming up, the players underwent countermovement jump test, weighted countermovement jump test and then performed 40 × 15-m sprints with with a 1:4 exercise: rest ratio. The jump height, sprinting time, fatigue index, heart rate and rating of perceived exertion (RPE) were analyzed by paired-sample t-test, when significance was discovered by two-way repeated measures analysis of variance. The study results revealed that the tDCS trial significantly increase the countermovement jump performance (p = 0.04), decrease the sprinting time (p = 0.016), and had improved fatigue index during the sprinting process (p = 0.009). However, the heart rate and RPE during sprinting were nonsignificantly different between the trials. This study has identified that tDCS can decrease the speed decline, fatigue index during sprinting and increase countermovement jump performance without affecting heart rate or the rating of perceived exertion.

scholarly journals Relationship Between Maximum Strength and Vertical Jump Performance in Junior Speed Skaters

GYMNASIUM ◽  
2020 ◽  
Vol XXI (2) ◽  
pp. 140
Author(s):  
Raluca Doina Ștef ◽  
Emilia Florina Grosu
Keyword(s):  
Intervention Program ◽  
Isometric Force ◽  
Vertical Jump ◽  
Jump Height ◽  
Countermovement Jump ◽  
Post Intervention ◽  
Jump Performance ◽  
Squat Jump ◽  
Jump Test ◽  
Maximal Isometric Force

The aim of this study was to determine the relationships between back squat maximal strength, maximal isometric force, jump squat and countermovement jump and whether power training improves parameters mentioned above in well-trained speed skaters. Sixteen athletes devided in two groups, performed two maximal squat strength test and two vertical jump test before and after the intervention program. Absolute strength showed a strong correlation with squat jump height (r = 0.762, p < 0.001) and countermovement jump height (r = 0.760, p < 0.001) but also between maximal isometric force and squat jump (r = 0.418, p = 0.036). Percentage change within the experiment group were significantly different from pre to post intervention for each parameter tested in the order described, respectively: 14%; 16.8%; 14.9%; 9.1%. These results suggest that jump squat training can improve several athletic performances developing high levels of lower body strength to enhance jump performance.

scholarly journals The effect of fatigue on jump height and the risk of knee injury after a volleyball training game: A pilot study

2021 ◽  
Vol 13 (1) ◽  
pp. 197-204
Author(s):  
Charis Tsarbou ◽  
Nikolaos I. Liveris ◽  
Panagiotis D. Tsimeas ◽  
George Papageorgiou ◽  
Sofia A. Xergia ◽  
...  
Keyword(s):  
Perceived Exertion ◽  
Cruciate Ligament ◽  
Vertical Jump ◽  
Rating Of Perceived Exertion ◽  
P Value ◽  
Clinical Tool ◽  
Jump Test ◽  
Scale Scores ◽  
The Difference ◽  
Dependent Samples

Abstract Study aim: To investigate the effect of fatigue, induced by a volleyball training game on the risk of Anterior Cruciate Ligament (ACL) injury. Material and methods: Thirteen female volleyball college athletes, ages 18 to 21 years old, completed jump landings from a box 30 cm height, prior and post a 60-minute volleyball training game. The clinical tool Landing Error Scoring System (LESS) was employed in order to evaluate the technique of landing prior and post the game. The level of fatigue induced by the volleyball game was assessed by vertical jump test and Borg Rating of Perceived Exertion (RPE) Scale pre and post-game. In order to compare measurements pre and post-game t-tests for dependent samples were used. Results: Participants performed lower vertical jumps post-game with a Confidence Interval of 26.2 ± 2.3 cm (pre-game) and 24.9 ± 2.2 cm (post game). The difference between pre and post-game was found to be statistically significant with a t12 = 2.55 and a p-value of 0.026. In the case of assessing fatigue, the Borg RPE scale scores were found to be statistically significant (t12 = 14.05, p < 0.001) higher post-game (10.2 ± 0.6), as compared to pre-game (6.5 ± 0.4). Similarly, LESS scores increased significantly (t12 = 2.21, p = 0.047), post-game (6.3 ± 1.1) compared to pre-game (5.8 ± 1.0) that prove poorer landing ability. Conclusion: It seems that a short duration volleyball training game induces fatigue and negatively affects the jumping and landing ability.

scholarly journals Do differences between the training load perceived by elite beach volleyball players and that planned by coaches affect neuromuscular function? (¿Las diferencias entre la carga de entrenamiento percibida por los jugadores de voleibol de playa de élite y

Retos ◽  
2020 ◽  
pp. 632-636
Author(s):  
Ana Denise Andrade ◽  
Mário Simim ◽  
Witalo Kassiano ◽  
José Manuel Palao ◽  
Karla De Jesus ◽  
...  
Keyword(s):  
Perceived Exertion ◽  
Vertical Jump ◽  
Training Session ◽  
Neuromuscular Function ◽  
Training Load ◽  
Technical Training ◽  
Rating Of Perceived Exertion ◽  
Countermovement Jump ◽  
Jump Performance ◽  
Previous Training

Summary. This study aimed to verify the differences between the training load planned by coaches and that perceived by Beach Volleyball (BV) players and observe the effects on athletes’ neuromuscular function. Three female BV players and well-known coaches participated in the research and were accompanied for three training weeks in the preseason phase. Rating of perceived exertion (RPE) was collected through the 0-10 scale during a previous training session. Strength, physical fitness and tactical-technical training have been assessed with coaches and athletes’ responses 30 minutes after the end of the session. RPE Session was calculated by the product between the training duration in minutes and RPE, to estimate Internal Training Load (ITL). Neuromuscular function was assessed through Countermovement Jump (CMJ). To verify differences between coaches and athletes’ responses and vertical jump performance were used either the magnitude of differences and clinical inference. Athletes experienced lower RPE and ITL as planned by coaches in the first week of training. CMJ increased substantially from the first to the third week (with likely differences (93/03/04), standardized difference = 1.60 and 90% confidence intervals = 0.00; 3.21). We suggest that training load planned by coaches similar to that perceived by athletes have a concomitant improvement with neuromuscular performance.Resumen. Este estudio tuvo como objetivo verificar las diferencias entre la carga de entrenamiento planificada por los entrenadores y la percibida por los jugadores de voleibol de playa (VP) y observar los efectos sobre la función neuromuscular de los atletas. Tres jugadoras de VP y entrenadores conocidos participaron en la investigación y fueron acompañadas durante tres semanas de entrenamiento en la fase de pretemporada. El valor nominal del esfuerzo percibido (NEP) se recolectó a través de la escala 0-10 durante una sesión de entrenamiento anterior. La fuerza, la forma física y el entrenamiento táctico-técnico se evaluaron con las respuestas de los entrenadores y atletas 30 minutos después del final de la sesión. El producto calculó la sesión de NEP entre la duración del entrenamiento en minutos y el NEP, para estimar la carga interna de entrenamiento (CIE). La función neuromuscular se evaluó mediante salto contramovimiento (SCM). Para verificar las diferencias entre los entrenadores y las respuestas de los atletas y el rendimiento del salto vertical, se utilizó la magnitud de las diferencias y la inferencia clínica. Los atletas experimentaron menos NEP e CIE que fueron planificados por los entrenadores en la primera semana de entrenamiento. SCM aumentó sustancialmente de la primera a la tercera semana (con diferencias probables (93/03/04), diferencia estandarizada = 1.60 e intervalos de confianza del 90% = 0.00; 3.21). Sugerimos que la carga de entrenamiento planificada por entrenadores similar a la percibida por los atletas tenga una mejora concomitante con el rendimiento neuromuscular.

scholarly journals Correlação entre percepção subjetiva do esforço e fadiga neuromuscular dos membros inferiores em atletas de futebol

2020 ◽  
Vol 18 (3) ◽  
pp. 37-41
Author(s):  
Caique Lopes Müeller ◽  
Pedro Sotero da Cunha Neto ◽  
Eloir Junior da Silva Dos Santos ◽  
Alexandre Oliveira ◽  
Rosimeide Francisco dos Santos Legnani ◽  
...  
Keyword(s):  
Perceived Exertion ◽  
Vertical Jump ◽  
Training Session ◽  
Rating Of Perceived Exertion ◽  
Lower Limbs ◽  
Fat Percentage ◽  
Jump Test ◽  
Before And After ◽  
Statistical Program ◽  
The Difference

OBJETIVO: Determinar a correlação entre a percepção subjetiva do esforço (PSE) e a fadiga neuromuscular dos membros inferiores por meio de saltos mensurados no pré e pós treino em atletas de futebol.MÉTODOS: Quatorze atletas de futebol (sub 17) foram monitorados ao longo de quatro sessões de treinamento. Com as seguintes características: estatura (173±6,81cm), peso (64,43±5,80kg) e percentual de gordura (14,74±3,11). A PSE foi monitorada por meio do aplicativo e-trimp, 15 minutos após o final de cada sessão de treinamento. Os saltos foram avaliados por meio da plataforma de salto Jump System Pro, 10 minutos, antes e depois das sessões de treinamento. Os dados foram analisados no programa estatístico SPSS por meio da estatística descritiva e correlação de Spearman.RESULTADOS: A correlação entre a PSE e a diferença da potência relativa do salto vertical (pré/pós treino) foi fraca para todas as sessões. As sessões 1 e 4 apresentaram correlação negativa (r=-0,184, p=0,530; r=-0,159, p=0,587). As sessões 2 e 3 apresentaram correlação positiva (r=0,010, p=0,973; r=0,373, p=0,188), respectivamente.CONCLUSÃO: Não foram observadas correlações estatisticamente significativas entre a PSE e a potência relativa de salto nos atletas avaliados.ABSTRACT. The correlation between the rating of perceived exertion and neuromuscular fatigue on the lower body in soccer athletes.OBJECTIVE: Define the correlation between the rating of perceived exertion (RPE) and the power of the lower limbs before and after training in soccer athletes.METHODS: Were monitored 14 soccer athletes (under 17 years old) over four training sessions. With the following characteristics: height (173±6.81cm), weight (64.43±5.80kg) and fat percentage (14.74±3.11). RPE was monitored through the e-trimp app, 15 minutes after the end of each training session. Jumps were evaluated through the Jump System Pro jumping platform, 10 minutes before and after the training sessions. Data was analyzed in the SPSS statistical program using descriptive statistics and Spearman correlation.RESULTS: The correlation between the RPE and the difference of the relative power of the vertical jump test (pre/post training) was weak for all the sessions. Sessions 1 and 4 presented a negative correlation (r=-0.184, p=0.530; r=-0.159, p=0.587). Sessions 2 and 3 showed a positive correlation (r=0.010, p=0.973; r=0.373, p=0.188), respectively.CONCLUSION: There were no statistically significant correlations between the RPE and the relative jumping power in the evaluated athletes.

scholarly journals Usefulness of Linear Mixed-Effects Models to Assess the Relationship between Objective and Subjective Internal Load in Team Sports

2021 ◽  
Vol 18 (2) ◽  
pp. 392
Author(s):  
Alice Iannaccone ◽  
Daniele Conte ◽  
Cristina Cortis ◽  
Andrea Fusco
Keyword(s):  
Heart Rate ◽  
Perceived Exertion ◽  
Mixed Model ◽  
Linear Mixed Model ◽  
Team Sports ◽  
Rating Of Perceived Exertion ◽  
Subjective Measures ◽  
Internal Load ◽  
Random Slopes ◽  
The Relationship

Internal load can be objectively measured by heart rate-based models, such as Edwards’ summated heart rate zones, or subjectively by session rating of perceived exertion. The relationship between internal loads assessed via heart rate-based models and session rating of perceived exertion is usually studied through simple correlations, although the Linear Mixed Model could represent a more appropriate statistical procedure to deal with intrasubject variability. This study aimed to compare conventional correlations and the Linear Mixed Model to assess the relationships between objective and subjective measures of internal load in team sports. Thirteen male youth beach handball players (15.9 ± 0.3 years) were monitored (14 training sessions; 7 official matches). Correlation coefficients were used to correlate the objective and subjective internal load. The Linear Mixed Model was used to model the relationship between objective and subjective measures of internal load data by considering each player individual response as random effect. Random intercepts were used and then random slopes were added. The likelihood-ratio test was used to compare statistical models. The correlation coefficient for the overall relationship between the objective and subjective internal data was very large (r = 0.74; ρ = 0.78). The Linear Mixed Model using both random slopes and random intercepts better explained (p < 0.001) the relationship between internal load measures. Researchers are encouraged to apply the Linear Mixed Models rather than correlation to analyze internal load relationships in team sports since it allows for the consideration of the individuality of players.

scholarly journals A Training Proposal to Improve Multidirectional Running Technique in Male and Female Handball Players: A Pilot Study

2021 ◽  
Vol 18 (4) ◽  
pp. 2056
Author(s):  
Carmen Ferragut ◽  
Román Pedreira ◽  
José Julio Espina ◽  
Helena Vila
Keyword(s):  
Team Sports ◽  
T Test ◽  
Control Group ◽  
Sprint Training ◽  
Countermovement Jump ◽  
Squat Jump ◽  
Male And Female ◽  
Intervention Protocol ◽  
Post Test ◽  
Experimental Group

Multidirectional running has been described as an important factor in team sports performance. The aim of the present study was to determine changes in T-test, 505 time, 10 m sprint, squat jump (SJ), countermovement jump (CMJ), countermovement jump right leg (CMJRL), and countermovement jump left leg (CMJLL) following exposure to 12 sessions over 4 weeks of a multidirectional running sprint training intervention in male and female handball players. A total of 31 handball players (15 male and 16 female) were recruited for this study and then randomly assigned to an experimental group (EG) or control group (CG). Male EG players showed improvements in 505 Preferred Side (PS) (p ≤ 0.05), 505 Non-Preferred Side (NPS) (p ≤ 0.05), and 10 m sprint (p ≤ 0.05), while female EG players presented statistically significant improvements between pre- and post-test for the T-test (p ≤ 0.05), 505 PS (p ≤ 0.05), 505 NPS (p ≤ 0.05), and 10 m sprint (p ≤ 0.05). No statistically significant pre- and post-test differences were observed in CG (all p ≥ 0.05) or between male and female players. We found an improvement in handball players’ agility and speed of movement following the intervention protocol, suggesting the need to introduce this program into our training sessions. It may also be necessary to select and develop more specific tests in order to evaluate multidirectional work in handball players.

Acute consumption of p-synephrine does not enhance performance in sprint athletes

2016 ◽  
Vol 41 (1) ◽  
pp. 63-69 ◽  
Author(s):  
Jorge Gutiérrez-Hellín ◽  
Juan José Salinero ◽  
Javier Abían-Vicen ◽  
Francisco Areces ◽  
Beatriz Lara ◽  
...  
Keyword(s):  
Scientific Information ◽  
Monitoring Program ◽  
Well Being ◽  
Placebo Control Trial ◽  
Placebo Control ◽  
Jump Height ◽  
Countermovement Jump ◽  
Squat Jump ◽  
Jump Test ◽  
The Hours

P-Synephrine is a protoalkaloid widely used as an ergogenic aid in sports. This substance has been included in the World Anti-Doping Agency monitoring program, although scientific information about its effects on performance and athletes’ well-being is scarce. The purpose of this investigation was to determine the effectiveness of p-synephrine to increase performance in sprint athletes. In a randomized and counterbalanced order, 13 experienced sprinters performed 2 acute experimental trials after the ingestion of p-synephrine (3 mg·kg−1) or after the ingestion of a placebo (control trial). Forty-five minutes after the ingestion of the substances, the sprinters performed a squat jump, a countermovement jump, a 15-s repeated jump test, and subsequently performed 60-m and 100-m simulated sprint competitions. Self-reported questionnaires were used to assess side-effect prevalence. In comparison with the control trial, the ingestion of p-synephrine did not change countermovement jump height (37.4 ± 4.2 vs 36.7 ± 3.3 cm, respectively; P = 0.52), squat jump height (34.4 ± 3.6 vs 33.9 ± 3.7 cm; P = 0.34), or average 15-s repeated jumps height (31.8 ± 4.1 vs 32.2 ± 3.6 cm; P = 0.18). P-Synephrine did not modify maximal running speed during the 60-m (9.0 ± 0.5 vs 9.0 ± 0.4 m·s−1, respectively; P = 0.55) and 100-m sprint competitions (8.8 ± 0.5 vs 8.8 ± 0.5 m·s−1, respectively; P = 0.92). The ingestion of p-synephrine did not alter the prevalence of headache, gastrointestinal discomforts, muscle pain, or insomnia during the hours following the tests. Acute consumption of 3 mg·kg−1 of p-synephrine was ineffective to increase performance in competitive sprint athletes. Moreover, p-synephrine did not increase the occurrence of side effects after the competition.

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