Young Volleyball Athletes Research Articles

The Effects of Neuromuscular Training in the Maintenance of Fitness in Volleyball Players During the Junior Period

The paper wants to present the importance of performing neuromuscular training in order to permanently maintain a form of high fitness throughout the competitive period. The aim of this work was to verify the effects of training on neuromotor variables in young volleyball athletes at different times of the program. The hypothesis of the study starts from the fact that further investigation together with the realization and application of a training program, will contribute to the achievement of training fitness during competitive periods. The outcomes of implementing this training regimen with young female volleyball players underscore the suitability of engaging in competition during their initial phase.

Investigation of the Effect of Push-Up Exercises with and without Suspension on Some Motor Skills Applied to Young Volleyball Athletes

ABSTRACTThe aim of this study was to compare the relationships between some motor skills in the upper extremity region of 20 male volleyball players aged 15-18 years, competing in the 8th Group of the 2nd League of the Turkish Volleyball Federation, with and without suspended and unsuspended Push-Up (PU) bosu ball exercises applied for 3 sessions every week for 8 weeks. In addition to the normal training program, the first group was trained with unsuspended (PU) and the second group was trained with suspended (PU) for 8 weeks. Both groups performed Medicine Ball Throw to evaluate upper extremity strength, Closed Kinetic Chain Upper Extremity Stability Test to evaluate endurance and Upper Extremity Y-Balance Test to evaluate balance before and after the training program. As a result of this study, the difference values of the test results before and after the training were compared. A significant difference was found between the groups in the upper extremity right and left arm 0,000, Y Balance Test Medial dominant 0,000, and non-dominant 0,004, Superolateral dominant and non-dominant 0,000, Inferiorlateral dominant 0,024 and non-dominant 0,000, chest and overhead 0,000 Health Ball Throw test difference changes (p0,05). Performing the applications used in classical training methods on unstable grounds can increase the motivation of volleyball athletes and contribute to their performance. As a result, it seems that unsuspended and suspended (PU) exercises can increase the levels of medicine ball throwing, closed kinetic chain upper extremity stability test and upper extremity Y-balance test with the exercises applied, although the levels are different. Further studies on the subject by increasing the number of participants in different groups and using electronic devices will be useful.Keywords: Bosu Ball, Motor Skills, Push-Up, Upper extremity, Volleyball

Muscular Endurance and Strength as Predominant Factors on Spike among Young Volleyball Athletes

Most of physiological investigation in volleyball studies only discussed which body part is dominant when someone doing spike. There are still few studies to explore in more detail on what muscle works and roles of muscle is so crucial. This study aims to determine which part of the muscle has a more specific effect during spike movements. This study uses a quantitative descriptive method, participants in this study were female and male adolescent athletes obtained 42 participants, divided into 20 males and 22 females. Data on muscle endurance and strength were obtained by measuring the leg and back dynamometer, while the spike hit results collected from The Volleyball Test Skills for Smasher and performance were obtained using observation using a range of points 1-4, which is based on five spike phases: Initial Attitude, Initial Motion, Contact Motion, Follow through Motion, and Ball Placement. Data analysis used ANOVA test and simple regression. The results showed that the performance was significantly increased by the strength of the back muscles (p = 0.005 < 0.05) and abdominal muscles (p = 0.012 < 0.05), while the other components were supportive but not significant. Likewise, the strength of the inner leg muscles (p = 0.010 < 0.05) which has a very significant level of influence (p < 0.01) on the spike results. Strengthening back muscle and abdominal muscle endurance need to be the focus of the training program for young volleyball athletes because they are needed during spike movement and inner leg muscle strength is needed to obtain maximum spike jumps. Keywords: spike; endurance; strength; muscle; young athletes; volleyball

Effects of in-situ stroboscopic training on visual, visuomotor and reactive agility in youth volleyball players.

Stroboscopic training is based on an exercise with intermittent visual stimuli that force a greater demand on the visuomotor processing for improving performance under normal vision. While the stroboscopic effect is used as an effective tool to improve information processing in general perceptual-cognitive tasks, there is still a lack of research focused on identifying training protocols for sport-specific settings. Therefore, we aimed at assessing the effects of in-situ stroboscopic training on visual, visuomotor and reactive agility in young volleyball players. Fifty young volleyball athletes (26 males and 24 females; mean age, 16.5 ± 0.6 years) participated in this study and were each divided randomly into an experimental group and a control group, who then both performed identical volleyball-specific tasks, with the experimental group under stroboscopic influence. The participants were evaluated three times using laboratory based tests for simple and complex reaction speed, sensory sensitivity and saccade dynamics; before the after the 6-week-long training (short-term effect) and 4 weeks later (long-term effect). In addition, a field test investigated the effects of the training on reactive agility. A significant TIME vs GROUP effect was observed for (1) simple motor time (p = 0.020, ηp2 = 0.08), with improvement in the stroboscopic group in the post-test and retention test (p = 0.003, d = 0.42 and p = 0.027, d = 0.35, respectively); (2) complex reaction speed (p < 0.001, ηp2 = 0.22), with a large post-test effect in the stroboscopic group (p < 0.001, d = 0.87) and a small effect in the non-stroboscopic group (p = 0.010, d = 0.31); (3) saccade dynamics (p = 0.011, ηp2 = 0.09), with post-hoc tests in the stroboscopic group not reaching significance (p = 0.083, d = 0.54); and (4) reactive agility (p = 0.039, ηp2 = 0.07), with a post-test improvement in the stroboscopic group (p = 0.017, d = 0.49). Neither sensory sensitivity nor simple reaction time was statistically significantly affected as a result of the training (p > 0.05). A significant TIME vs GENDER effect was observed for saccadic dynamics (p = 0.003, ηp2 = 0.226) and reactive agility (p = 0.004, ηp2 = 0.213), with stronger performance gains in the females. There was a larger effectiveness from the 6-week volleyball-specific training in the stroboscopic group compared to the non-stroboscopic group. The stroboscopic training resulted in significant improvements on most measures (three of five) of visual and visuomotor function with more marked enhancement in visuomotor than in sensory processing. Also, the stroboscopic intervention improved reactive agility, with more pronounced performance gains for short-term compared to the long-term changes. Gender differences in response to the stroboscopic training are inconclusive, therefore our findings do not offer a clear consensus.

Effect of land- and aquatic-based plyometrics on spike and block reaches in young volleyball players: a pilot study

Aim: The purpose of this pilot study was to analyze the feasibility of the intervention and measures of a six-week land- and aquatic-based plyometric training on spike and block reaches in young volleyball athletes. Methods: Twelve female players were divided into a land group (LG) (n = 6, 12.4 ± 0.3 years, 1.61 ± 0.04 m, 57.0 ± 9.3 kg) and a water group (WG) (n = 6, 12.5 ± 0.5 years, 1.57 ± 0.06 m, 48.9 ± 8.5 kg). The spike and block (without step, with slide step, and with crossover step) reach and countermovement jump height were evaluated before and after a 6-week plyometric training protocol. Duration (total and of each session), adhesion and adherence, and safeness of the intervention; completion of assessments, within-trial reliability, and variability of the outcome measures and preliminary results were the variables of interest. To analyze the effect of the training on jump performance, the Wilcoxon test was used (p < 0.05), and effect sizes (r) were calculated. Results: All participants concluded the intervention and the assessments as planned. No dropouts or adverse events were registered during the study. The within-trial reliability for all assessment tests was considered excellent (ICC ≥ 0.9). Preliminary results indicate that LG improved the reach of the spike and block with the slide step; and that WG improved the spike, block with the slide step to the left, and block without movement reaches (p < 0.05; large effect size). Conclusion: An intervention of six weeks of plyometric training on land and in water is feasible, and preliminary results indicate that both training protocols may benefit the performance of spike and block in young volleyball athletes.

Long-Term Changes in Vertical Jump, H:Q Ratio and Interlimb Asymmetries in Young Female Volleyball Athletes.

The present study aimed to examine the changes that occurred in vertical jump and isokinetic dynamometer (ISK) performances at the beginning of a preparatory period (PRE) and at the start of the competitive period (POST). Sixteen U-17 elite female volleyball players, from a national level (15.34 ± 1.19 years; 66.35 ± 7.95 kg; 169.22 ± 24.79 cm), performed bilateral squat jump (SJ), bilateral and unilateral countermovement jump (CMJ) and unilateral ISK tests for knee flexors (Fl) and extensors (Ex) both at 60°/s and at 300°/s. Peak torque (PT) and the hamstring-to-quadriceps (H:Q) ratio were assessed by concentric actions. Asymmetries were calculated by the percentage differences between dominant (DOM) and nondominant legs (NDOM). The paired Student's t-test was used for comparisons at a level of significance of 5%. The effect size was also calculated. A significant increase was found for both SJ (15%; p = 0.004; ES = 0.82) and CMJ (12%; p = 0.017; ES = 0.62). The PT of NDOM flexors at 60°/s was significantly lower than DOM both at PRE (4.6%; p = 0.048; ES = -0.22) and POST (6.3%; p = 0.037; ES = -0.33). The NDOM extensors at 60°/s had a significantly lower PT than DOM at POST (7.0%; p = 0.048; ES = -0.23). Both DOM and NDOM flexors at 60°/s had a PT enhancement at POST related to PRE (6.7%; p = 0.031; ES = 0.51 and 5.6%; p = 0.037; ES = 0.48, respectively). The PT of NDOM extensors at 300°/s increased at POST in comparison to PRE (7.9%; p = 0.038; ES = 0.27). The NDOM at 300°/s had a H:Q ratio higher than DOM both in PRE and POST (8.6%; p = 0.041; ES = 0.37 and 11.6%; p = 0.013; ES = 0.71, respectively), and the highest H:Q ratios were lower than the reference values (<80%). The asymmetry of the unilateral CMJ was higher at POST than at PRE (102%; p = 0.03; ES = 0.81). The PT for the flexors at 300°/s and the H:Q ratio at POST exceeded 10%. In conclusion, a training program of 15 weeks increased the neuromuscular performance of young volleyball athletes, but many H:Q ratios and asymmetries remained out of the normal recommendation. Volleyball professionals should carefully apply an adequate training program to enhance physical fitness performance without increasing the risk of lower limb injuries concurrently.

The influence of jumping performance and coordination on the spike ability of young volleyball athletes

Background and Study Aim. Spike is the most important techniques to be mastered due to its big impacts to volleyball match. There is still lack of study to evaluate and discusses how the role of jumping performance and coordination in volleyball could affect spike ability. The purpose of this study was to determine the influence of these variables on spike ability.&#x0D; Material and Methods. This study used a quantitative descriptive method, involved 42 participants (20 men and 22 women). The jump performance was measured using MyJump 2 application which can measure flight time, force, jump height, jumping power and speed based on free-arm jumping method. Then, the measurement of coordination was done using an alternative hand wall test. Spike ability is shown by the results of the hit and spike performance. Spike performance was based on The Volleyball Test Skills for Smasher. For spike performance, data collection is based on observations from five phases of spike movement; i) Initial posture; ii) Initial Motion; iii) Motion of Appeal; iv) Advanced Motion; v) Placement of the ball, using the scoring points 1-4. All the data was analyzed using descriptive statistics and Pearson Correlation. &#x0D; Results. The results of the study show that in the perspective of gender differences, almost all variables had significant difference between men and women on flight time (0.028 &lt; 0.05), force (0.001 &lt; 0.01), jump height (0.040 &lt; 0). 0.05), strength (0.001 &lt; 0.01), and speed (0.028 &lt; 0.05), coupled with coordination (0.003 &lt; 0.01), hit results (0.181 &gt; 0.05), and spike performance (0.216 &gt; 0.05). Meanwhile, the relationship between variables were found to be significant (p-value &lt; 0.01) on the five jumping performance variables. Another significant correlation obtained from the results of calculations between coordination and jump height (0.033 &lt; 0.05), coordination with strength (0.044 &lt; 0.05), coordination with spike hitting results was significant (0.003 &lt; 0.01). Instead of them, relationship between one and another was not found significant relationship (p-value &gt; 0.05).&#x0D; Conclusions. Coaches can use the information in this study as a guideline to develop training program to improve their athletes effectiveness in spiking.

Dynamic Taping Improves Landing Biomechanics in Young Volleyball Athletes.

Poor landing biomechanics such as hip adduction, internal rotation, and knee valgus have been recognized as modifiable risk factors of anterior cruciate ligament (ACL) injury. Dynamic taping is a newly developed technique with better elasticity and extensibility, which could change the landing biomechanics. The purpose of this study was to identify whether dynamic taping could improve lower limb biomechanics in athletes. Forty-two high school volleyball athletes (21 males and 21 females) participated in the study. Biomechanical properties, including the landing error scoring system (LESS) and anterior–posterior knee laxity, were evaluated before and after the application of dynamic tape while athletes performed the jump-landing task. As a result, we found that dynamic tape significantly reduced the faulty landing strategy by an average of 0.64 errors in all volleyball athletes. The effect induced by dynamic tape was more prominent in female athletes and high-risk athletes (1.1 errors). Furthermore, the application of dynamic tape improved anterior–posterior knee laxity, especially in female athletes (p < 0.001). In conclusion, we found that dynamic tape provided a short-term, passive, and clinically significant means to normalize inadequate biomechanics during landing in athlete groups, which could have a protective effect and further alleviate the risk of ACL injury.

Shoulder Rotation Range of Motion and Serve Speed in Adolescent Male Volleyball Athletes: A Cross-Sectional Study.

BackgroundThrowing athletes present alterations in shoulder rotation range of motion (ROM), but not much is known about the relationship between these alterations and performance measurements in volleyball practitioners.PurposeTo compare the passive ranges of motion of internal rotation (IR), external rotation (ER), and total rotation motion (TRM) of the shoulder in dominant and nondominant limbs of young volleyball athletes and to investigate their relationship with ball speed during serves with and without precision (inside and outside court, respectively). The possible association of anthropometrics and competitive practice time with these velocities was also investigated.Study DesignCross-sectional study.MethodsFifty-seven male volleyball athletes (mean age 17.11 ± 1.88 y; weight 74.68 ± 9.7 kg; height 1.87 ± 0.09 cm) were evaluated for shoulder IR and ER with a bubble goniometer and serve speed inside and outside court was measured with a radar gun. Simple and multiple regression analyses were applied to investigate associations of ROM, anthropometrics, and competitive practice time with serve speed.ResultsDominant shoulders had diminished IR ROM compared to nondominant shoulders (59.1º ± 16.7º vs 66.4º ± 16.9º; p < 0.001) as well as diminished TRM (173.5º ± 31.8º vs 179.1º ± 29.9º; p < 0.001). Simple regression showed negative association between dominant ER and serve speed outside the court (p = 0.004). Positive associations existed between age and serve speed in both conditions (p < 0.001), BMI and speed inside (p = 0.009) and outside the court (p = 0.008), and between competitive practice time and speed inside (p = 0.008) and outside court (p = 0.003). However, multiple analysis confirmed only age (p < 0.001) and BMI to be associated with ball velocities (inside court p = 0.034; outside court p = 0.031).ConclusionThe results of this study demonstrated that young volleyball athletes presented lower IR and TRM of the shoulder in the dominant upper limb. Age and BMI were directly associated with ball velocities when serving. Passive rotation ROM did not have a relationship with this performance measurement.Level of Evidence3b

Risk of developing eating disorders through the misperception of the body image and the adoption of bad eating habits in a sample of young volleyball athletes

Objective: This preliminary study focused on the description of some dysfunctional perceptions of the body image and eating habits in a sample of young. Methods: The results obtained by 55 amateur and professional volleyball players belonging to volleyball sports clubs located in the province of Reggio Emilia were examined. The age of the sample is in a range between 11 and 44 years. The participants completed the Pisa Survey for Eating Disorders (PSED), a questionnaire aimed at examining eating behavior and the perception of one’s body image. The athletes’ height and body weight were subsequently detected through direct measurement. Conclusion: The data collected through the self-evaluation questionnaire and the measurements carried out by the study made it possible to analyze the perception of the body image and the eating habits of the volleyball players belonging to the sample and to compare them with the data in the literature. The data, albeit preliminary, allow us to confirm the existence of the discrepancy between the real body image and the desired one, in a group of young athletes, who favors the adoption of non-adaptive coping strategies to control one’s own weight and body shapes typical of the vicious circle - strict diet, bingeing episodes, compensatory behaviors - which characterizes eating disorders (ED). It is therefore considered essential that body image assessment is a practice implemented in the assessment routine of these athletes, especially in consideration of the fact that body image disturbance is a very common feature in this category and is one of the main risk factors of EDs.

Photobiomodulation therapy and NMES improve muscle strength and jumping performance in young volleyball athletes: a randomized controlled trial study in Brazil.

The purpose of this study was to investigate the effectiveness of adding photobiomodulation therapy and neuromuscular electrical stimulation (NMES) to volleyball athletes' training, focusing on muscle strength and jumping skills. Thirty-six athletes were randomly placed into three groups: control, photobiomodulation therapy, and NMES. The athletes trained to improve their muscle strength and jumping skills. The athletes in the photobiomodulation therapy group were submitted to photobiomodulation therapy (850nm, continuous, energy density 0.8J/cm2, radiant energy per point 6J, total radiant energy 36J) before undergoing strength and plyometric training. The NMES group additionally underwent NMES-based quadriceps femoris muscle strength training (base frequency 1kHz, frequency modulation 70Hz, intensity maximum tolerable). The variables analyzed were muscle strength, jumping ability, global impression, and jump frequency; they were measured at baseline and during follow-ups at 6 and 8weeks. The statistical analysis was conducted on an intention-to-treat basis. The between-group differences and their respective 95% CIs were calculated using linear mixed models by using group, time, and group-versus-time interaction terms. Dominant lower limb strength improved the most in the NMES group compared to the control group (mean difference = 1.4, 95% CI = .5 to 2.4). Non-dominant lower limb strength increased in both the photobiomodulation therapy group (mean difference = 1.1, 95% CI = .3 to 2) and the NMES group (mean difference = 1.9, 95% CI = 1.1 to 2.8) compared to the control group, but the NMES group improved more than the photobiomodulation therapy group (mean difference = 0.8, 95% CI = 0.1 to 1.7). The NMES group had the greatest improvement in global perceived effect scale compared to the control group (mean difference = 1.1, 95% CI = 1 to 2.2). Dominant lower limb strength improved in the NMES group compared to the control group. Non-dominant lower limb strength increased in both the photobiomodulation therapy group and the NMES group compared to the control group, but the NMES group improved significantly more than the photobiomodulation therapy group; the NMES group also improved in the global perceived effect scale compared to the control group. This study found that, for volleyball athletes, photobiomodulation therapy and NMES both promoted benefits in terms of muscle-strength gain. In addition, these benefits were maintained for 2weeks even after training was interrupted. Dominant lower limb strength improved in the NMES group compared to the control group. Non-dominant lower limb strength increased in both the photobiomodulation therapy group and the NMES group compared to the control group, but the NMES group improved significantly more than the photobiomodulation therapy group; the NMES group also improved in global impression of jumps compared to the control group.

Frequency and associated factors of poor knee alignment in young Brazilian volleyball players

ABSTRACTObjectives: Poor knee alignment during the deceleration phase of closed kinetic chain movements, such as landings, is a relevant risk factor for injuries in sports. This study assessed the knee alignment and possible associated factors in young Brazilian volleyball athletesMethods: One hundred and seventeen athletes of both genders (9–19 years old) were assessed during a drop jump for the observation of knee alignment. Chi-square test was used to describe the association between poor knee alignment and: gender, age category (≤14 years and ≥15 years), sports experience, participation in competitions, the presence of knee pain during training, and history of lower limb injuryResults: Seventy percent of athletes presented poor knee alignment, which was slightly associated with a sports experience lower than one year.Conclusion: Thus, considering the high number of volleyball practitioners and its strong presence in physical education classes, preventive measures should be adopted for young volleyball athletes of both genders, especially in the sports initiation phase.

Efeito da Ansiedade Competitiva sobre a Tomada de Decisão em Jovens Atletas de Voleibol

Resumo O objetivo do estudo foi analisar o efeito da ansiedade competitiva sobre a tomada de decisão de jovens atletas de voleibol. A amostra foi composta por 24 voluntários do sexo masculino (16,06 ±0,65 anos). Utilizou-se a versão brasileira do Competitite State Anxiety Inventory para avaliar a ansiedade competitiva. A tomada de decisão foi avaliada em situação real de jogo, adotando-se os critérios do Game Performance Assessment Instrument (GPAI). Localizaram-se correlações negativas da ansiedade cognitiva e ansiedade somática com o índice de tomada de decisão (p&lt;0,05). Revelaram-se correlações positivas entre a “autoconfiança” e o índice de tomada de decisão (p&lt;0,05). Revelou-se influência da ansiedade cognitiva, somática e autoconfiança no índice de tomada de decisão (p&lt;0,05). Concluiu-se que a ansiedade pode ser considerada um fator interveniente na tomada de decisão.

Effect of an eight-week imagery training programme on passing decision-making of young volleyball players

Background: The passing decision-making performance in volleyball is important because it determines the quality of a team’s attack. However, no study has analysed the effect of imagery training on passing decision-making performance in young volleyball athletes. Purpose: The objective was to analyse the effect of eight weeks of imagery training on passing decision-making performance. Method: Participants were 33 young male athletes (under 17 years [U-17]). Participants were randomly assigned to two groups: experimental (EG, n = 17) and control group (CG, n = 16). The CG watched videos of advertisements, while EG participated in the imagery training. A cognitive-general imagery programme was adopted, that asks the athletes to imagine themselves executing passes during a competitive event (e.g. reception of the service with variations of speed and displacement, pass to middle attacker, pass to other attackers, and pass with projection of the body on the ground). The passing decision-making was evaluated in a simulation of a volleyball official game. The analysis of actions was based on the Game Performance Assessment instrument. A heart rate monitor was adopted as an indicator of the autonomic nervous system response during the sessions for the EG and CG. Results: The results revealed a group versus intervention interaction (p < .01) for the passing decision-making, with improvement only in the EG (p = .01). A statistically significant difference in heart rate was identified between the groups (p = .01), with a higher value in the EG. Conclusions: It was concluded that imagery training enhanced passing decision-making performance.

Análise das tendências competitivas em jovens atletas praticantes de voleibol

Introdução: As tendências em competir, vencer e estabelecer metas pessoais não envolvem apenas treinamento físico, técnico e tático, mas também fatores relacionados à preparação psicossociológica. Objetivo: Analisar o comportamento de jovens atletas de voleibol em relação às tendências competitivas (TQ) individuais em competir, vencer e estabelecer metas e verificar possíveis diferenças entre os sexos. Métodos: A amostra foi composta por 241 atletas de voleibol, com idade média de 15,19±1,59 anos e tempo de prática médio de 3,52±2,22 anos. As TQs foram avaliadas pelo Sistema de Avaliação ACS – 2. Para a análise dos dados, foi utilizado o teste de Mann-Whitney, com significância de 5%. Resultados: Os atletas apresentaram os mesmos valores para a tendência em competir (19,00), porém os meninos relataram maior importância para vencer (9,00 vs 10,00±5,00) e estabelecer metas (8,00±3,00 vs 9,00±4,00). Conclusões: Conforme dados analisados inversamente, os atletas apresentaram comportamento expressivo voltado ao estabelecimento de metas.

Treinamento físico pré-competitivo e marcadores de desempenho, estresse e recuperação em jovens atletas de voleibol

O objetivo deste estudo foi analisar o efeito do treinamento fisico aplicado em um periodo pre-competitivo na potencia e na resistencia de forca explosiva de membros inferiores, no estresse e na recuperacao de jovens atletas de voleibol. Sete atletas (15,8 ± 0,5 anos, 186,1 ± 6,6cm, 75,9 ± 1,8kg) de uma equipe de voleibol sub-16, do sexo masculino, foram treinados durante um periodo pre-competitivo de quatro semanas. A carga interna de treinamento (CIT) foi monitorada pelo metodo PSE da sessao. Testes de salto vertical com contramovimento (CMJ) e de natureza intermitente, de quatro series de 15 segundos (TSVI), foram avaliados no 1o dia de treinamento (linha de base), no ultimo dia da 2a (pos-semana 2) e da 4a semana (pos-semana 4). O Questionario RESTQ-Sport foi aplicado na linha de base, no ultimo dia da 2a, 3a e 4a semanas (Pos-semana 2, 3 e 4). A CIT nao foi diferente (p>0,05). O CMJ aumentou no pos-semana 2, comparado com a linha de base e no pos-semana 4, comparado com o pos-semana 2 (p<0,05). A media de potencia nos 15 segundos iniciais e a media de potencia das quatro series de 15 segundos do TSVI foram maiores no pos-semana 4, comparado a linha de base (p<0,01). As escalas Fadiga e Lesoes do RESTQ-Sport se alteraram ao longo do treinamento (p<0,05). Conclui-se que o treinamento aplicado durante o periodo pre-competitivo proporcionou incrementos no CMJ e no TSVI, e as alteracoes no RESTQ-Sport sugerem que os atletas apresentaram niveis adequados de estresse e recuperacao.