Abstract
Physiological responses in futsal have not been studied together with temporal information about the players’ stay on the court. The aim of this study was to compare heart rate (HR) and blood lactate concentration ([La−]) responses between 1-H and 2-H considering the time of permanency of the players on the court at each substitution in a futsal match. HR was recorded during entire match and [La−] was analyzed after each substitution of seven players. %HRmean (89.61 ± 2.31 vs. 88.03 ± 4.98 %HRmax) and [La−] mean (8.46 ± 3.01 vs. 8.17 ± 2.91 mmol·L−1) did not differ between 1-H and 2-H (ES, trivial-small). Time in intensity zones of 50–100 %HRmax differed only in 60–70 %HRmax (ES, moderate). HR coefficient of variation throughout the match was low (7%) and among the four outfield players on the court (quartets, 5%). Substitutions (2 player’s participation in each half), time of permanence on the court (7.15 ± 2.39 vs. 9.49 ± 3.80 min), ratio between time in- and out-ratio on the court (In:Outcourt = 1:1.30 ± 1:0.48 vs. 1:1.05 ± 1:0.55 min) also were similar between 1-H and 2-H (ES, moderate and small, respectively). Balancing the number of substitutions, and the In:Outcourt ratio of players in both halves of the match, playing lower time at 1-H, ~8 min for each participation in the match, made it possible to maintain intensity of the match in 2-H similar to the 1H. These results are a good guidance to coaches and for application in future studies.
Highlights
MATERIALS AND METHODSFutsal is an adaptation of soccer for practice on the court played in two halves of 20-min with a 10-min interval between halves, with higher intensity than other team sports as soccer, handball and basketball (Barbero-Alvarez et al, 2008), demanding aerobic and anaerobic pathway
CV% mean of the heart rate (HR) of the players throughout the match was 7 ± 2%, 6 ± 1% and 8 ± 2% in 1-H and 2-H, respectively
The study presents results not yet investigated in the literature, such as the temporal analysis of the substitutions and of [La−] each substitution of the players
Summary
MATERIALS AND METHODSFutsal is an adaptation of soccer for practice on the court played in two halves of 20-min with a 10-min interval between halves, with higher intensity than other team sports as soccer, handball and basketball (Barbero-Alvarez et al, 2008), demanding aerobic and anaerobic pathway. Professional futsal players had lower mean HR (HRmean) in the second half (2-H) compared to the first half (1-H), 88.1 vs 91.1% of HRmax, respectively, and percentage of time spent in high intensity HR zone (Barbero-Alvarez et al, 2008). In a simulated match the HR did not differ among the four 10-min periods (Castagna et al, 2009) as well as parameters relationship to the players’ sprints did not differ between 1-H and 2-H in official matches of professional players (Barbero-Alvarez et al, 2008; de Oliveira Bueno et al, 2014; Caetano et al, 2015; Vieira et al, 2016), friendly match (Vieira et al, 2016) and simulated match (Milioni et al, 2016)
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