Along with the main trends and future challenges of electrical networks embedded in more-electrical aircraft, this article also focuses on optimization efforts field industrial electronics energy conversion. Optimization can be achieved by means expertise or from classical analysis methods, especially those based simulations. However, novel approaches algorithms, so-called integrated design optimization, are becoming increasingly mature will become particularly powerful if subsequent made...

Menzel, H-J, Chagas, MH, Szmuchrowski, LA, Araujo, SRS, de Andrade, AGP, and Resende Jesus-Moraleida, F. Analysis of lower limb asymmetries by isokinetic vertical jump tests in soccer players. J Strength Cond Res 27(5): 1370–1377, 2013—Assessment extremity bilateral players is important for both injury prevention performance. The purpose this investigation was to compare knee extensor assessment asymmetry with a more specific countermovement (CMJ). Forty-six Brazilian male professional...

Abstract We present a critical reflection on the mechanical variable Player Load, which is based acceleration data and commonly used in sports. Our motivation to write this paper came from difficulties that we encountered calculation interpretation of Load using our own data, since did not use Catapult Sports equipment, merchandise company proposed variable. reviewed existing literature order understand better; found many inconsistencies PL methods meanings attached it. Accordingly, presents...

The aim of this study was to investigate the impact protocols equalized by time under tension (TUT) but composed different repetition durations and repetitions numbers on muscle activation blood lactate concentration. Twenty-two males with previous experience in resistance training performed 2 (A B) Smith machine bench press exercise, both 3 sets, minutes' rest, 60% 1 maximum (1RM). Protocol A consisted 6 a 6-second duration for each repetition, whereas B subjects 12 3-second repetition....

The aim of the present study was to compare acute effects constant torque (CT) and angle (CA) stretching exercises on maximum range motion (ROMmax), passive stiffness (PS), ROM corresponding first sensation tightness in posterior thigh (FSTROM). Twenty-three sedentary men (age, 19-33 years) went through 1 familiarization session afterward proceeded randomly both CA CT treatment conditions, separate days. An isokinetic dynamometer used analyze hamstring muscles during knee extension. subjects...

The analyses of players and teams' behaviors during the FIFA World Cup may provide a better understanding on how football tactics strategies have developed in past few years elite football. Social Network Analysis (SNA) has been carried out investigations about passing distribution, improving interact cooperate match. In official matches, studies used SNA as means coding players' cooperation opposition patterns. However, situational variables such match status were previously investigated...

This study aimed to systematically review the influence of relative area on athletes' physical and physiological responses (outcomes) during small-sided games soccer which were not matched area. It also presents a meta-analysis comparing standard protocols with different areas. We searched Web Science Scopus electronic databases for literature published up March 2020 following all PRISMA guidelines selecting articles qualitative quantitative synthesis. As result, eleven inclusion criteria....

Previous studies on soccer small-sided games (SSGs) chose between with and without offside rule conditions evidence-based criteria. The current study aimed to compare the positional dynamics of 3v3 SSGs rule.Twenty-four Brazilian U-17 national-level players were recruited. They split into eight teams played . Positional data gathered by a Global Positioning System, teams' length, width, length per width ratio (LPWratio), stretch index players' spatial exploration calculated. Data compared...

This study compared the physical, physiological, and spatiotemporal responses of soccer athletes in small-sided games (SSG) two experimental conditions: progression to target rule (PG), which they should take ball opponent's endline score points, SSG with regular rules (RG), goals win game.Twenty U-20 played both formats. The were as four 4-minute bouts minutes passive recovery consecutive days. Heart rate, physical (distances accelerations), positional data (length, width, spatial...

During the lockdown for coronavirus disease 2019 (COVID-19), entire populations were instructed to live in home confinement. We investigated effects of COVID-19 on physical activity (PA) and mental health students employees a Colombian University. A cross-sectional study was conducted through an online survey during first isolation. total 431 respondents (192 males) aged 18–60 years old (28.1 ± 11.1 years) participated. The international Physical Activity Questionnaire (IPAQ) short version...

This study analyzed the effect of different repetition durations on electromyographic and blood lactate responses bench press exercise. Fifteen recreationally trained male volunteers completed two training protocols, matched for intensity (% one-repetition maximum; 1RM), number sets, repetitions, rest intervals. One protocols was performed with a duration 4 s (2 concentric: 2 eccentric; 2:2 protocol), whereas second protocol had 6 2:4 protocol). The results showed higher normalized...

This study aimed to evaluate brain temperature (Tbrain) changes in spontaneously hypertensive rats (SHRs) subjected two different physical exercise protocols temperate or warm environments. We also investigated whether hypertension affects the kinetics of exercise-induced increases Tbrain relative abdominal (Tabd) increases. Male 16-week-old normotensive Wistar (NWRs) and SHRs were implanted with an sensor a guide cannula frontal cortex enable insertion thermistor measure Tbrain. Next,...

Different small-sided games (SSG) can be used by coaches to induce specific demands on athletes during team sports training. In basketball, defensive and time pressures are common stressors experienced players official matches. However, no studies have investigated the effect of changing these variables in SSG We compared physical physiological three basketball performed a half court with two hoops: 3vs3 man-to-man defence playing area, full reduced shot-clock (3vs3HALF, 3vs3FULL, 3vs3RT,...

Space creation dynamics (SCDs) describe actions players perform to create a scoring opportunity. This study compared SCDs and types of offense during three different versus (3vs.3) basketball small-sided games (SSGs) played in half court: 3vs.3 with man-to-man defense playing area (3vs.3HALF), full (3vs.3FULL), reduced shot clock (3vs.3RT). We also investigated the efficacy all SSGs reliability 3vs.3HALF. While did not differ among these SSGs, 3vs.3RT presented significantly more "space ball...

This study aimed to analyze which defensive performance indicators differentiate winning and losing teams verify of these variables better predict probabilities during the Men’s 2022 FIFA World Cup. Data from all 64 matches played competition were gathered public sources. The comprised event-based positional-based data. between compared using multivariate analysis variance, multiple linear regression was used detect predictors. Results indicated that performed more forced turnovers ( p =...

This study aimed to compare the collective and individual tactical positional behavior before first goal was scored or conceded in official soccer matches. The sample comprised 50 players 27 matches played Brazil during 2020 2021 U-20 seasons. Global Positioning System devices were used monitor players’ data. Collective – width, length, length per width ratio, stretching index spatial exploration variables calculated compared between contextual scenarios by a one-way ANOVA. Results indicated...

DOI: http://dx.doi.org/10.5007/1980-0037.2016v18n1p62 The aim of this study was to compare the collective tactical behavior between numerically balanced and unbalanced small-sided soccer games. Eighteen male players (mean age 16.4 years) participated in study. Polar coordinate analysis performed using positional data obtained with a 15-Hz GPS device. Collective variables including length, width, centroid distance (average point teammates), length per width ratio (LPWratio) were collected....

Are motivation and overtraining reliable predictors of burnout in male professional soccer athletes over the course season? To answer this question, 32 Brazilian from same team (age: 24.16 ± 4.58 years) participated study completed following questionnaires during different periods season (n = 1 baseline, n 2 preparatory, 5 competitive): Sport Motivation Scale (SMS I), Recovery-Stress Questionnaire for Athletes (RESTQ-Sport 76), Athlete Burnout (ABQ). The results indicated positive negative...

Most literature has neglected the possible influence of game phase – offensive and defensive on players’ teams’ behaviors measured by positional data. Also, combined effect contextual variables match period, venue, outcome phases not been investigated yet. Therefore, this study aimed to integrate notational analysis investigate individual collective tactical behavior in different (offensive defensive) football matches under conditions. The sample comprised 18 played 24 U-20 elite Brazilian...