The purpose of this study was to characterise Brazilian teams' coverage area and spread on the pitch while attacking defending analyse organisation in tackle shot goal situations. We obtained trajectories 223 players eight games with a tracking method. Team defined as convex hull formed by players' positions. Frobenius norm distance-between-player matrix. calculated over time situations shots (n = 233) tackles 1897). While attacked, (median +/- confidence interval) ranged from 322.9 0.8...

Abstract The purpose of this study was to explore football game-related statistics during a competition, using principal component and cluster analyses determine if it is possible distinguish the winning teams from drawing losing ones. We collected group phase matches 2006 World Cup organised them into matrix. components covariance matrix were calculated. scores first second used represent new data, analysis applied separate elements in two groups (G1 G2). To analyse degree separation...

Abstract The purposes of this study were to characterise the total space covered and distances between players within teams over ten Brazilian First Division Championship matches. Filmed recordings, combined with a tracking system, used obtain trajectories (n = 277), before after half-time. team surface area (the convex hull formed by positions players) spread Frobenius norm distance-between-player matrix) calculated as functions time. A Fast Fourier Transform (FFT) was applied each time...

The purpose of this study was to measure and characterise the distances covered by Brazilian professional futsal players. trajectories 93 players during five matches were obtained using an automatic tracking method. analysed for different game conditions: over entire times when ball out play in separately. When considered, results showed that there a reduction total distance per minute from first [median ± IQR (interquartile range): 97.9 16.2 m/min] second half (median = 90.3 m/min; 12.0),...

The purposes of this study were to investigate sprints and characterize repeated-sprint sequences (RS) performed by athletes during professional futsal matches. We analyzed 97 players 5 official matches using the DVideo automatic tracking system. first second halves according playing position, RS categorized number time between them. results showed an increase (F[1, 2520] = 3.96; P .046) in sprint duration from (mean 3.1 ± 1.3) half 3.2 1.2). However, no differences found for other variables...

The purpose of this study was to investigate the coordination between teams spread during football matches using cross-correlation and vector coding techniques. Using a video-based tracking system, we obtained trajectories 257 players 10 matches. Team calculated as functions time. For general description, signals. Vector used identify patterns offensive sequences that ended in shots on goal or defensive tackles. Cross-correlation showed opponent have tendency present in-phase coordination,...

The aim of this study was to analyse the characteristics asymmetries in dominant and non-dominant limbs when kicking stationary rolling balls. Ten experienced Brazilian amateur futsal players participated study. Each participant performed kicks under two conditions (stationary ball vs. ball) with (five per condition limb). We analysed accuracy, foot velocities, angular joint displacement velocity. asymmetry between by symmetry index two-way repeated measures ANOVA. results did not reveal any...

The purpose of this study was two-step: (1) classify ball possession (BP) according to the duration and number passes (2) identify which tactical variables most discriminate different BP. We obtained 527 BPs from four official matches Brazilian Soccer Championship 2016. Forty-one "notational", "space occupation", "displacement synchronization" predictor were used. classified into three groups: short (11.07 ± 4.49 s, 1.93 0.99 passes), medium (26.83 7.33 5.41 1.84 long (55.50 14.97 12.11 4.61...

Abstract Angular kinematics of the hip, knee, and ankle joints, as well ball velocity accuracy for stationary rolling balls were compared in a futsal (Five-a-Side Indoor soccer) context. Ten athletes performed five kicks each on balls. Six digital cameras (120 Hz) recorded kicks. For both kick types, angles joints calculated using Euler angle conventions. velocity, foot linear relative also analyzed. The kicking showed similarities (24.2 ± 2.2 m/s 23.8 2.7 m/s, respectively), (17.6 1.8 17.2...

Abstract The purpose of this study was to analyse players’ positional variability during the 2012 UEFA European Championship by applying principal component analysis (PCA) data gathered from heat maps posted on website. We analysed teams that reached finals and semi-finals competition. 2D coordinates each match were obtained an image-processing algorithm maps. With all for match, we applied PCA identify directions greatest variability. Then, two orthogonal segments centred player’s mean...

Purpose: The purpose of this study was to compare the kicking performance young soccer players in U9 U20 age groups. Method: Three hundred and sixty-six Brazilian were evaluated on an official pitch using three-dimensional kinematics measure (300 Hz) ball velocity (Vball), foot (Vfoot), Vball/Vfoot ratio, last stride length, distance between support ball. Simultaneously, a two-dimensional procedure also conducted compute (60 mean radial error, bivariate variable accuracy. Possible...

The aim of this study was to identify the most relevant variables characterise performance level teams through Men's World Championships (2007–2019). Forty-seven attributes from match-related statistics and characteristics players were analysed in 168 participant teams. Descriptive discriminant analysis classified correctly 69.6% cases selected height players, 9-m efficiency, international matches disputed, wing blocked shots, 7-m goalkeeper efficiency 2-min suspensions which indicators....

The purpose of this research was to examine how an 11-day taper after 8.5-week experimental training cycle affected lactate levels during maximal exercise, mean force, and performance in swimmers, independent shaving, psychological changes, postcompetition effects. Fourteen competition swimmers with shaved legs torsos were recruited from the São Paulo Aquatic Federation. consisted a basic period (endurance quality phases) 8.5 weeks, 5,800 m.d(-1) volume 6 d.wk(-1) frequency; (TP) 1.5 weeks'...

The purpose of this study was to investigate whether the critical force (CritF) and anaerobic impulse capacity (AIC) - estimated by tethered swimming reflect aerobic performance swimmers. 12 swimmers performed incremental test in determine lactate threshold (AnTLAC), maximal oxygen uptake ( ˙VO2MAX) associated with ˙VO2MAX (i ˙VO2MAX). 4 exhaustive (tlim) exercise bouts (100, 110, 120 130% i compute CritF AIC (F vs. 1/tlim model); a 30-s all-out bout their fitness (ANF); 100, 200, 400-m...

The purpose of this research was to examine how an 11-day taper after 8.5-week experimental training cycle affected lactate levels during maximal exercise, mean force, and performance in swimmers, independent shaving, psychological changes, postcompetition effects. Fourteen competition swimmers with shaved legs torsos were recruited from the São Paulo Aquatic Federation. consisted a basic period (endurance quality phases) 8.5 weeks, 5,800 m·d-1 volume 6 d·wk-1 frequency; (TP) 1.5 weeks'...

This study investigated the acute effects of different sizes paddles on force-time curve during tethered swimming and velocity in front-crawl stroke. Fourteen male swimmers (20.0 ± 3.7 years; 100-m best time: 53.70 0.87 s) performed two 10-s maximal efforts to obtain peak force, average impulse, rate force development, stroke duration time force. Swimming velocity, length were obtained from 25-m swims. Both tests repeated five conditions: free swimming, wearing small (280 cm (2) ), medium...

The aims of the present study were 1) to evaluate effects 11 weeks a typical free-swimming training program on aerobic and stroke parameters determined in tethered swimming (Study 1; n=13) 2) investigate responses efforts, addition sessions, through 7 2; n=21). In both studies, subjects performed graded exercise test (GET) determine anaerobic threshold (AnT), rate at AnT (SRAnT), peak force GET (PFGET) blood lactate ([La-]GET). Participants also swam 100-, 200- 400-m lengths performance....

This study assessed whether a new, closed-skill dribbling or sprinting task could predict attacking performance in soccer. Twenty-five male players were recruited from the Londrina Junior Team Football Academy Brazil and asked to either dribble ball sprint through five custom circuits that varied average curvature (0–1.37 radians.m−1). These measures then validated using realistic one vs. competition which each player acted as attacker defender turn (N = 1330 bouts). Sprinting (ICC 0.96)...