Browsing by Author "Teixeira, José"
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- High-intensity running and sprint distance prior to hamstring injury in elite male soccer players. Is there a common theme in over- or under- loading in the weeks preceding hamstring injury?Publication . Morgans, Ryland; Oliveira, Rafael; Ceylan, Halil I.; Teixeira, José; Ryan, Ben; Modric, Toni; Moreira, AlexandreThe analysis of the period prior to injury is still scarce in soccer. Thus, the aim of this study was to examine the loading patterns of high-intensity running and sprint distances during the weekly cycle durations across a five year period in an elite soccer club. Specifically, to investigate any over- or under-loading in the weeks preceding hamstring injury. Thirty professional outfield soccer players from an English Premier League club were involved (age 24.2 ± 6.1 years, weight 74.7 ± 7.8 kg, height 1.81 ± 0.09 m). Injury surveillance, training and match data from the complete 2020/21 season was considered for analysis. Physical data were consistently monitored across the study seasons during all training sessions and matches using an 18Hz Global Positioning System (GPS) technology tracking system. The relative and absolute measures of total distance, high-intensity distance (m; total distance covered 5.5 - 7m/s) and sprint distance (m; total distance covered > 7m/s) were collected. These measures were analyzed considering the four weeks preceding injury (-4, -3, -2, -1) between injured and uninjured players. The main findings revealed that sprint distance per minute was higher in injured than uninjured players in the week preceding the injury (week -1, p = 0.038; ES = -0.89). No other meaningful differences were found. This study highlighted the influence of sprint distance per minute performed in the week preceding injury in elite English Premier League soccer players. Such findings highlight the importance of longitudinal measurements specifically related to sprint distance, while the analysis of two-, three- and four weeks prior to injury does not seem to add any significant value. Finally, the data from the present study highlights the importance of analyzing relativized data (per minute) compared to absolute data.
- The impact of injury on match running performance following the return to competitive match-play over two consecutive seasons in elite European soccer playersPublication . Morgans, Ryland; Rhodes, David; BEZUGLOV, Eduard; Etemad, O.; Di Michele, Rocco; Teixeira, José; Modric, Toni; Versic, S.; Oliveira, RafaelBased on the assessment and diagnosis, the rest period following a moderate/severe injury may lead to de conditioning for the injured player and therefore an association with a prolonged rehabilitation, re-conditioning and return to sport is observed post-injury. The aim of the present study was to assess the impact of all injuries on match running performance following the return to competitive match-play over two consecutive seasons in elite European soccer players. A retrospective analysis was conducted utilizing data related to a player’s injury and match running performance. A club physiotherapist consistently recorded availability and injury data in a standardized format. Linear mixed modelling analysis revealed no difference between PRE and POST1, POST2, and POST3 for total distance, running distance, high-intensity distance, and sprint distance (all p >0.05). Although, maximum speed was significantly (p<0.05) lower in POST1 and POST2 when compared to PRE, in both cases with a large (ES = 1.88) effect. No significant difference was observed for maximum speed between PRE and POST3 (p=0.07). There were very low correlations between the number of days absent and changes in maximum speed between POST1 and PRE (r = 0.09, 95% CI -0.42 to 0.56), and POST2 and PRE (r = 0.10, 95% CI -0.42 to 0.57), respectively. In conclusion, no variation in distance variables were found regardless of one, two or three matches post-injury compared to pre-injury status. Moreover, maximum speed was lower during the first three matches post-injury, although the mean value was slightly lower. Finally, a low correlation between absent days and maximum speed loss between pre-injury and following one and two matches were found.