Percorrer por autor "Vieira, Luiz"
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- In-season internal and external training monotony, strain and acute/chronic workload ratio variations between starters and non-starters of a top elite European soccer teamPublication . Oliveira, Rafael; Vieira, Luiz; Martins, Alexandre; Brito, João; Nalha, Matilde; Mendes, Bruno; Clemente, Filipe ManuelThe aim of this study was two-fold: (a) to describe the in-season variations of training monotony, training strain, and acute: chronic workload ratio (ACWR) through session rated perceived exertion (s-RPE), total distance and high-speed running (HSR); (b) to compare those variations between starters and non-starters. Seventeen professional players from an European First League team participated in this study. They were divided in two groups: starters (n=9) and non-starters (n=8). The players were monitored daily over a 41-week period of competition where 52 matches occurred during the 2015- 2016 in-season. Through the collection of s-RPE, total distance and HSR, training monotony, training strain and ACWR were calculated for each measure, respectively. Data were analysed across ten mesocycles (M: 1 to 10). Results revealed no differences between starters vs non-starters (p>0.05). M6 had a greater number of matches and displayed higher values in monotony (s-RPE, total distance and HSR), strain (only for total distance) and ACWR (s-RPE, TD and HSR). However, the variation patterns for all indexes displayed some differences. In conclusion, the values of both starters and non starters showed small differences between them and thus suggesting that the adjustments of training workloads that had been applied over the season helped to reduce differences according to the player status. Even so, there some variations over the season (microcycles and mesocycles) for the whole team. This study could be used as reference for future coaches, staff and scientists.
- In-season internal load and wellness variations in professional women soccer players: comparisons between playing positions and statusPublication . Fernandes, Renato; Brito, João; Vieira, Luiz; Martins, Alexandre; Clemente, Filipe; Nobari, Hadi; Reis, Victor; Oliveira, RafaelThe internal intensity monitoring in soccer has been used more in recent years in men's football, however, in women's soccer, the existing literature is still scarce. The aims of this study were threefold: (a) to describe the weekly variations of training monotony (Foster, 1998), training strain and acute:chronic workload ratio (Murray et al., 2017) through session Rated Perceived Exertion (s-RPE); (b) to describe weekly variations of Hooper Index [stress, fatigue, Delayed Onset Muscle Soreness (DOMS) and sleep] (Hooper & Mackinnon, 1995); and (c) to compare those variations between playing positions and player status. Nineteen players (24.1±2.7 years) from a Portuguese BPI League professional team participated in this study. All variables were collected in a 10-week in-season period with 3 training sessions and 1 match per week during the 2019/20 season. Considering the overall team, the results showed that there were some associations between Hooper Index categories and s-RPE like stress or fatigue (0.693, p<0.01), stress or DOMS (0.593, p<0.01), stress or s-RPE (-0.516, p<0.05) and fatigue or DOMS (0.688, p<0.01). There were no differences between all parameters in playing positions or player status. In conclusion, the study revealed that higher levels of fatigue and DOMS occurs concurrently with better nights of sleep. Moreover, any in-season variations concerning internal load and perceived wellness seems independent of position or status in outfield players. Also, the data showed that the higher the players’ reported stress, the lower the observed s-RPE, thus possible indicating a mutual interference of experienced stress levels on the assimilation of training intensity by women elite soccer players.
- Players´ performance during the worst-case scenarios in professional soccer matches: a systematic reviewPublication . Rico-González, Markel; Oliveira, Rafael; Vieira, Luiz; Pino-Ortega, José; Clemente, Filipe ManuelSince the analysis of worst-case scenarios (WCS) has been increasing knowledge about match demands and possible impacts for the training process, it seems important to summarize the evidence to provide useful information for the soccer community. Thus, the purpose of this systematic review was to summarize the evidence about WCS in professional soccer. A systematic review of PubMed, SPORTDiscus, and FECYT (Web of Sciences, CCC, DIIDW, KJD, MEDLINE, RSCI, and SCIELO) was performed according to the guidelines for performing systematic reviews in sport science. From the 85 studies initially identified, 12 were fully reviewed, and their outcome measures were extracted and analyzed. There was an inverse relationship between the duration of WCS windows and running output during match play. Occurrences of WCS during soccer matches were also position-dependent across studies, at least, when analyzing performance with the total distance covered variable, although different outputs were identified between women and men players. Future research should consider analyzing the impact of contextual variables (match status, team formation, and match location) on peak match values and the weight of these moderators.