Purpose This study aimed to investigate the effects of match location, quality opposition, outcome, and playing position on internal load (IL), external (EL), interpersonal interactions in professional soccer players. Also, relationships between parameters were measured. Methods Fourteen matches from 16 Brazilian players analysed. IL was obtained through rating perceived exertion. EL quantified with Global Positioning System (e.g., high-intensity running [HIR]). Interpersonal measured by...

Palucci Vieira, LH, Aquino, R, Moura, FA, Barros, RMLd, Arpini, VM, Oliveira, LdP, Bedo, BLdS, and Pereira Santiago, PR. Team dynamics, running, skill-related performances of Brazilian U11 to professional soccer players during official matches. J Strength Cond Res 33(8): 2202-2216, 2019-Analyses movements competition have been used previously help develop conditioning programs. However, this has not extensively studied in youth populations. Therefore, the purposes study were examine (1)...

This study aimed to quantify the weekly training load distributions according match location, opponent standard, and outcome in professional soccer players. Rate-of-perceived-exertion-based (sRPE) distance- accelerometry-based measures were monitored daily during 52 sessions 11 matches performed by 23 Athletes who played ≥ 60 min non-congested weeks considered for data analysis. The days close away (e.g., one day before = MD-1) presented greater sRPE, distance-based volume measures,...

This study aimed to verify the effects of congested fixture and matches' participation on internal external workload indexes in professional Brazilian soccer players. Rate perceived exertion-based training load (sRPE), distance- accelerometry-based measures were daily monitored over 119 sessions 33 matches performed by 29 male outfield Weeks classified as (n = 11, two or more within a 7-day period) regular 10, one match less period). The players divided based participation: (1) who played ≥...

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...

This study aimed to investigate how different strategies of task constraint manipulation impact physical and tactical demands in small-sided conditioned games (SSCG). Ten recreational U-17 soccer players participated this (16.89 ± 0.11 years). We used design two 4 vs. SSCG: Structural SSCG Functional SSCG. In SSCG, pitch format goal sizes were manipulated, while allowed kick the ball twice at least 5 passes shoot opponent’s goal. Players four five minutes duration with a two-minute interval...

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...

The aims of this study were: (i) to compare the external and internal load during a 6-a-side small-sided game (6v6-SSG) according age-group; (ii) relate these parameters between 6v6-SSG official matches; (iii) test reliability 6v6-SSG. A total 51 Brazilian youth soccer players participated in (U11 [n = 16]; U13 10]; U15 9]; U17 8]; U20 8]). Three experiments were conducted. Experiment A: fifty-one U11 submitted 6v6-SSGs (n 10 games; two for each age-group). B: thirty-two randomized also play...

Most of musculoskeletal models (MSKM) estimate the tibiofemoral joint reaction load at a single point or do not support large lower-limb ranges. This study aimed to adapt generic MSKM that allows knee and hip flexions compute medial lateral contact forces (TFCF) during gait squat tasks. The updated model includes compartment geometries allow computing vertical TFCF. does affect kinematics kinetics outputs in both tasks, sum TFCF was equivalent net original MSKM.

This paper presents Batch OpenSim Processing Scripts (BOPS), a Matlab toolbox for batch processing common procedures: Inverse Kinematics, Dynamics, Muscle Analysis, Static Optimization, and Joint Reaction Analysis. BOPS is an easy-to-use highly configurable tool that aims to reduce the time required process large datasets, thus fostering adoption of musculoskeletal modeling simulations in daily practice. Its graphical user interface includes pre-defined setup files has been designed fulfill...

This study investigated the effect of a handball-specific fatigue protocol on hip and knee kinematics. Twenty female handball athletes performed three trials single-leg landing (SLL), sidestep cutting manoeuvre (SCM), drop vertical jump (DVJ) before after protocol. Knee angle waveforms were compared using statistical parametric mapping (p < 0.05). During SLL, increased adduction (4–7% cycle) abduction (4–9% 25–27%). For SCM, flexion was reduced under during 14–29% 44–68% cycle. Similarly,...

Aim The main aim of this study was to identify the effects match location, quality opponents and status on possession during 2015/16 Season England Premier League. Methods Three hundred eighty matches played by 20 teams were analysed. For each match, two values recorded, resulting in 760 observations. Results Teams who at home (51.77 ± 10.22%) presented higher (EF=moderate) than those away (48.21 10.30%). Quality also had a significant difference, as (EF=large) when against weak (52.30...

Noncontact anterior cruciate ligament ruptures generally occur during unanticipated sidestep cutting maneuvers when athletes have their visual attention focused on the opponent. The authors investigated influence of uncertainty related to side perform maneuver knee kinematics female handball athletes. A total 31 performed anticipated and uncertain conditions. During condition, cues indicated direction reactive maneuver. Between-condition differences were compared using Student t test for...

Abstract The transcriptional repressor REV-ERB-α, encoded by Nuclear Receptor Subfamily 1 Group D Member ( Nr1d1 ), has been considered to play an essential role in the skeletal muscle oxidative capacity adaptation and mass control. Also, this molecule regulates autophagy via repression of autophagy-related genes both brain regions. Classically, training programs based on endurance or strength characteristics enhance content and/or capacity, leading activation several tissues. Thus, it seems...

This study investigated the effect of adding haptic information to control posture, as well comparing both "light touch" (LT) and "anchor system" (AS) paradigms on postural sway. Additionally, it compared location number points contact posture in young adults. The consisted using anchors tied finger held by hands, and, for LT, fingertip. For contact, participants used two then separately dominant hand, non-dominant anchor LT paradigms. Participants stood upright with feet-together tandem...

Aim: The main purpose of the study was to investigate kicking kinematics and performance in young-trained soccer players according age, playing status, biological maturity.Methods: Youth male (N = 105) from five age groups (under-11, under-13, under-15, under-17, under-20) were evaluated. Four digital video cameras (300 Hz) captured participants' lower extremity ball during penalty kick trials using dominant limb.Results: It possible identify non-linear differences angular joint...

The current brief research report aimed to investigate the influence of contextual variables on peak running performance in male elite soccer players. We analyzed 29 matches an team during Brazilian Serie A 2019. Twenty players were tracked using GPS units. Peak physical was determined moving average values with different time windows (1, 3, and 5-min periods). total distance covered, covered high-intensity (≥19.8 km·h

BACKGROUND: Evaluating exercise intensity is crucial for designing effective training programs and monitoring progress. The Rating of Perceived Exertion (RPE) scale, a subjective measure effort, commonly used estimating intensity. However, its applicability in specific conditions populations, particularly co-contraction older individuals, warrants further investigation. AIM: Our main aim was to analyze the correlation between RPE electromyographic (EMG) activity conventional resistance...

Loading both lateral and medial compartments is crucial to understanding the effect of muscle fatigue during sidestep cutting. The present study investigated changes in tibiofemoral contact forces force contributions sidestep-cutting manoeuvre after a handball-specific protocol. Twenty female handball athletes performed three trials before (baseline) Motion capture ground reaction were measured, data processed OpenSim. variables compared using statistical parametric mapping (SPM), with...

The main aim of this study was to verify the relationship between classification coaches and actual performance in field tests that measure kicking young soccer players, using K-means clustering technique.Twenty-three U-14 players performed 8 their performance. Four experienced provided a rating for each player as follows: 1: poor; 2: below average; 3: 4: very good; 5: excellent related three parameters (i.e. accuracy, power ability put spin on ball).The scores interval established from...

Verbal instruction increases electromyographic (EMG) activity in the first three repetitions of an exercise, but its effect on entire exercise set until failure is unknown. Once there are changes motor unit recruitment due to fatigue, verbal instructions can change during different intervals a set. This study analyzed whether emphasized contraction back muscles (i.e., myoelectric activity) initial, intermediate, and final performed failure. Twenty participants with little or no experience...