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- How weekly monitoring variables influence players’ and teams’ match performance in elite futsal playersPublication . Ribeiro, João Nuno; Monteiro, Diogo; Sampaio, Jaime; Couceiro, Micael; Travassos, BrunoThis study aimed to investigate how weekly training load constrains the performance of players and teams in official futsal competitions. Data from a professional male team were collected during two seasons (46 weeks). The applied monitoring system analysed the training load (as measured by session perceived exertion, sRPE), the total recovery status (TQR), the well-being score (WBs) and the variability of neuromuscular performance during each week (CMJ-cv). In addition, the performance was assessed for all the matches. A path analysis model was performed to test the associations across variables. Results from the path analysis model revealed that it explains 31% of the teams’ performance. In general, the results show that previous team performance has no significant effects on the training week. A significant negative relationship was found between CMJ-cv and match performance (β = -.34; CI95% -.359 to -.070), as well as a significant negative relationship between players’ match performance and the team’s match performance (β = -.55; CI95% -.292 to .740). Regarding indirect effects, only a negative association between CMJ-cv and team match performance via players’ match performance (β = -.19; CI95% -.342 to -.049) was identified. The small variation of the weekly CMJ (CMJ-cv) seems to be a key variable to monitor and explain both player and team performance. Based on this model, and only looking at the physical variables, it was possible to explain 31% of the team’s performance. Longitudinal and multi-team studies should be conducted to integrate other technical, tactical and psychological variables that allow the level of understanding of players’ and teams’ performance to be improved.
- Variation in Physical Performance of Futsal Players During Congested FixturesPublication . Ribeiro, João Nuno; Monteiro, Diogo; Gonçalves, Bruno; Brito, João; Sampaio, Jaime; Travassos, BrunoPurpose: To investigate the match-to-match variation of physical performance during official congested fixtures in elite futsal players. Methods: Physical performance was measured by external and internal load metrics in 12 elite male futsal players. Two periods with 3 matches within 4 days were analyzed. The variation in physical performance of the players during matches was analyzed using the latent growth curve modeling that estimated interindividual and intraindividual growth paths. Results: Playing time had a significant effect on physical performance growth with significant paths of interindividual and intraindividual variability. Players who competed for more time revealed lower initial levels (ie, first match) of total distance covered (β = −0.62), high-speed running (β = −0.18), accelerations (β = −0.31), decelerations (β = −0.44), and session rate of perceived exertion (β = 0.81) than players who competed for less time (P < .05). In addition, players who competed for more time revealed higher increases in total distance covered (β = 0.47), high-speed running (β = 0.16), and session rate of perceived exertion (β = 0.66) and lower increases in accelerations (β = −0.21) and decelerations (β = −0.58) than players who competed for less time from the first to the third match (P < .05). Conclusions: Congested fixtures did not affect physical performance in elite futsal players. Playing time showed to be a key performance factor. There was a considerable heterogeneity in the responsiveness to physical performance over congested fixtures, suggesting an analysis of individual variability to evaluate real changes in match performance, training intensity, and workload.
- Exploring the effects of interchange rotations on high-intensity activities of elite futsal playersPublication . Ribeiro, João Nuno; Gonçalves, Bruno; Illa, Jordi; Couceiro, Micael; Sampaio, Jaime; Travassos, BrunoThe literature lacks an understanding of the physical demands of team sports with unlimited substitutions (player interchange rotations). Because of this characteristic of the game, it is necessary to analyze the physical requirements through player rotation rather than analyzing global averages. The objective of this research is to investigate the relationship between high-intensity activities (HIA; sum of accelerations, decelerations, and high-speed running actions) performed per interchange rotations and match time variables (playtime, rest time, and work–rest ratio) in elite futsal players. A retrospective observational design was used. Twelve matches from an elite male team competing in the Premier Spanish Futsal League were analyzed using a local positioning system, yielding a total sample of 17 players. The number of HIA performed per interchange rotation varies between players and allows the identification of three distinct activity profiles—lower HIA (10 HIA), medium HIA (28 HIA), and higher HIA (38 HIA). Furthermore, these profiles were found to be stable alongside the existing interchange rotations throughout the match. Playtime (F = 40.9, p < .001) and work–rest ratio (F = 15.6, p < .001) are the time variables that best differentiate match activity profiles. Players with more playing time (4.6 ± 1.0 min) and a work–rest ratio equal to or greater than 1 (1.1 ± 0.6 a.u.) have a greater ability to repeat HIA per rotation.
- Elite Performance in Futsal - towards an integrative approach of physical to individual tactical actionsPublication . Ribeiro, João Nuno Gonçalves; Travassos, Bruno Filipe Rama; Sampaio, António Jaime da Eira; Couceiro, Micael SantosThis work aims to investigate the physical demands of the futsal match-play to provide precise information to optimize the athletes' physical monitoring systems, to identify, throughout its development, the most reliable methodological assumptions for the collection of external load data, as well as its integration with different contexts (physical, tactical and technical analysis). Six studies were conducted in this regard, with the goals of a) identifying the different variables of a physical monitoring system and their influence on the individual performance of the player and the team; b) investigating the physical demands of the futsal modality, identifying the different activity profiles and the best metrics to analyze the match; c) investigating the intra and inter physical variability of players over a congested period; and d) investigating the high physical variability of players; e) investigate high-intensity activities in their various properties throughout the match, as well as in the various positions that players occupy on the field; and f) identify individual tactical actions that players perform in high-intensity activities (acceleration, deceleration, and high-intensity running) in various positions. The overall findings of this thesis highlight the significance of implementing a monitoring system in futsal athletes, and study 1 identified the CMJ-cv as a key variable to be monitored, which has an impact on individual performance and team collective performance. Furthermore, according to the findings of study 2, it was discovered that it is possible to add external load data to these monitoring systems, allowing us to individualize the work in the different activity profiles through the variables that best represent the game's demands, which can be divided into three dimensions: kinematic (distance covered per minute and distance covered at different thresholds), mechanical (deceleration), and metabolic (metabolic power). Similarly, elite futsal players were found to be able to maintain their physical performance between the first and second halves of the match in the same study. In study 3, players demonstrated their ability to maintain physical performance during congested periods (3 games in 4 days), but the importance of playing time was highlighted to better understand the variability in individual players' performance. These findings prompted us to investigate the physical performance through players' rotations that were performed on the field, and we discovered, through study 4, that game time is not the only important factor to monitor, but also the rest time between rotations. In this regard, study 5 shows that the first player rotation on the field is the most physically demanding and that high-intensity activities must be monitored not only in terms of total frequency (n) but also over time-frequency (time (s) between the occurrence of one high-intensity activity and another) and work-rate (distance covered in high-intensity activities per minute of rotation (m/min). In an attempt to contextualize the high-intensity activities of the futsal match, study 6 shows that the physical demands of the players are related to the specific function of their position on the field, with the frequency and type of individual tactical actions revealed as the variables that distinguish the different profiles of activity in the different positions. This result is related to the fact that individual tactical actions with and without the ball (acceleration and high-intensity running) necessarily require different physical demands. In conclusion, the findings suggest that a proper physical monitoring system with methodological procedures tailored to the specificity of the modality, as well as the incorporation of various game contextual factors, allows for individual monitoring of players based on their activity profile or position, to improve individual and collective team performance. Furthermore, it can provide accurate information to technical staff to develop training exercises that best replicate the demanding competitive environment.
- Strength and Power Performance Changes During an In-Season Resistance Training Program in Elite Futsal Players: A Case StudyPublication . Marques, Diogo Luís; Ribeiro, João Nuno; Sousa, António Carlos; Travassos, Bruno; Marques, Mário CardosoIn this study, we aimed to analyze (i) the strength and power changes after resistance training (RT) in elite futsal players, and (ii) the associations between the session rate of perceived exertion (sRPE) and perceived total quality recovery (TQR), and the sRPE and TQR with the volume load of the RT program. Ten elite futsal players (24.8 ± 5.4 years; 76.2 ± 7.1 kg; 1.77 ± 0.05 m) performed an in-season 8-week RT program twice per week. RT consisted of 2-3 sets x 3-6 reps at 45-65% of one-repetition maximum (1RM) with maximal velocities in the full squat and complementary exercises with the same volume. We assessed the TQR before every session, while the sRPE was calculated after each RT session. One week before and after the intervention, we measured the countermovement jump (CMJ) height, isometric hip adduction strength (IHAS), 1RM, and peak power (PP) in the full squat progressive loading test. After the 8-week training program, there was a significant improvement in most outcomes, yet the gains (%Δ) remained below the minimal detectable change (MDC), except for IHAS (CMJ: p < 0.05, %Δ = 6.7, MDC% = 7.2; IHAS: p < 0.001, %Δ = 19.1, MDC% = 14.6; 1RM: p > 0.05, %Δ = 9.2, MDC% = 21.5; PP: p < 0.05; %Δ = 14.4, MDC% = 22.4). We also found a significant negative correlation between TQR and the sRPE (r = -0.45, p < 0.001). Our data suggest that RT based on low-volume and low-to-moderate loads may not produce a sufficient stimulus to induce meaningful dynamic strength and power gains in elite futsal players, although it improves isometric strength. Furthermore, monitoring TQR before sessions may show coaches how the elite futsal player will perceive the session's intensity.