ORCID Profile
0000-0001-9971-7308
Current Organisations
Tarbiat Modares University
,
Universidade Federal de Minas Gerais
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Publisher: MDPI AG
Date: 28-01-2021
Abstract: The aim of this study was to analyze the variations of acute load (AL), acute: chronic workload ratio (ACWR), training monotony (TM), and training strain (TS) of accelerometry-based GPS measures in players who started in three matches (S3M), two matches (S2M), and one match (S1M) during congested weeks. Nineteen elite professional male players from a Portuguese team (age: 26.5 ± 4.3 years) were monitored daily using global positioning systems (GPSs) over a full season (45 weeks). Accelerometry-derived measures of high metabolic load distance (HMLD), high accelerations (HA), and high decelerations (HD) were collected during each training session and match. Seven congested weeks were classified throughout the season, and the participation of each player in matches played during these weeks was codified. The workload indices of AL (classified as ACWR, TM, and TS) were calculated weekly for each player. The AL of HMLD was significantly greater for S2M than S1M (difference = 42% p = 0.002 d = 0.977) and for S3M than S1M (difference = 44% p = 0.001 d = 1.231). Similarly, the AL of HA was significantly greater for S2M than S1M (difference = 25% p = 0.023 d = 0.735). The TM of HD was significantly greater for S2M than S3M (difference = 25% p = 0.002 d = 0.774). Accelerometry-based measures were dependent on congested fixtures. S2M had the greatest TS values, while S3M had the greatest TM.
Publisher: IEEE
Date: 2009
Publisher: IACSIT Press
Date: 2012
Publisher: SAGE Publications
Date: 07-01-2023
DOI: 10.1177/17479541211068830
Abstract: The aim of this study was to compare the physical demands of SSG with either greater length (SSG length ) or width (SSG width ) with official soccer matches. Sixteen Brazilian U-20 national-level soccer players participated in two sessions with SSG length (4v4, 40 m length and 26 m width) and two sessions with SSG width (4v4, 26 m length and 40 m width). External and internal load variables were monitored and compared to official games (12.8 ± 8.9 games per player). Data were standardized to the time and compared between the experimental conditions by a one-way analysis of variance (ANOVA) with repeated measures (level of significance set at p 0.05). The effect size was calculated by the partial ETA squared (ɳ p2). Results showed that the total distance covered during SSG length was significantly higher compared to official matches (8.1% p = 0.001) and SSG width (5.2% p = 0.049). Highest values were registered in the matches when compared to SSG length and SSG width for high-speed distance, sprint distance, maximal speed and number of sprints. The number of accelerations was significantly lower during official matches than SSG width (36.5% p = 0.002) and SSG length (45.0% p 0.001). The number of high-speed actions was higher in official games when compared to SSG width (47.1% p 0.001). No differences were found between matches and SSG length ( p = 0.059). We concluded that the physical demands of the 4v4 SSGs adopted in this study were different from the physical demands of official match play. The use of a field with a greater width rather than length does not appear to make the physical demands of the SSG more similar to the official games.
Location: Brazil
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