Browsing by Author "Haslam, Chris"
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- Can different scores in first and second halves influence running and explosive-based measures?Publication . Morgans, Ryland; Radnor, John; Oliver, Jon; Scholten, Jule; Zmijewski, Piotr; Kavanagh, Ronan; Ryan, Ben; Haslam, Chris; King, Matthew; Oliveira, RafaelThis study aimed to examine the influence of different scores in the first and second half on running and explosive-based performance of elite male soccer players. Thirty-three professional players from one English Premier League team participated in the study across two consecutive seasons, 2021/22 and 2022/23. Matches were divided into half (first versus second) and nine phases; WIN-WIN; WIN-DRAW; WIN-LOSS; DRAW-WIN; DRAW-DRAW; DRAW-LOSS; LOSS-WIN; LOSS-DRAW; and LOSS-LOSS. Match physical data were monitored using an 18 Hz Global Positioning System. There was a main effect for half for all variables (p < 0.001–0.008; η2 = 0.004–0.028), with distances covered per minute and number of explosive actions per minute greater in the first-half than second-half (d = 0.144–0.374). There was an interaction effect between half and phase for m/min, high-speed running per min, high metabolic load distance (HMLD) per min, HML efforts/min, and accelerations/min (p < 0.001–0.012; η2 = 0.010–0.015). There was a reduction between first-half and second-half performance during WIN-WIN, WIN-DRAW, DRAW-WIN, DRAW-DRAW, LOSE-WIN, and LOSE-LOSE for m/min (p < 0.001; d = 0.435–0.714), HMLD/min (p < 0.001–0.004; d = 0.334–0.605), and HML efforts/min (p < 0.001; d = 0.408–0.611). In conclusion, our findings emphasise the importance of considering both match half and phase when analysing players’ physical performance to support the prescription of tailored training programs and tactical strategies to optimise performance across different match situations.
- Match running performance is influenced by possession and teamformation in an English Premier League teamPublication . Morgans, Ryland; Radnor, John; Fonseca, Jose; Haslam, Chris; King, Matthew; Rhodes, Dave; Żmijewski, Piotr; Oliveira, RafaelThe aim of this study was to examine the possession (very low, low, high, and very high), team formation (3-5-2 and 4-3-3) and position (centre-backs, full-backs, centre midfielders, attacking midfielders, and centre forwards) on match load across two consecutive seasons in elite soccer. Twenty-seven English Premier League outfield players were recruited. Data was monitored through an 18 Hz Global Positioning System and a 25 Hz semi-automated camera tracking system, respectively, and all variables were analysed per minute. Main effects for formation on total distance (TD) (p = 0.006; η2 = 0.010), high-speed running (HSR) (p = 0.009; η2 = 0.009), number of high metabolic load (HML) efforts (p = 0.004; η2 = 0.011) were observed. In addition, there were significant interaction effects with formation×possession on TD (p < 0.001; η2 = 0.043), HSR (p = 0.006; η2 = 0.018), sprinting (p < 0.001; η2 = 0.030), HML efforts (p < 0.001; η2 = 0.035), accelerations (p < 0.001; η2 = 0.025). From the position-specific analysis, only the running performance of centre-backs was affected by formation or positional factors. These results indicate that formation and possession can have a significant impact on TD, HSR, and HML distance. Furthermore, players performed more high-intensity efforts in 3-5-2 than 4-3-3 formation. These findings suggest that coaches can evaluate running performance in the context of formation and possession and tailor tactical strategies to optimise physical performance.
- Physical match performance of elite soccer players from the English Championship League and the English Premier League:The effects of opponent ranking and positional differencesPublication . Morgans, Ryland; Michele, Rocco Di; Ceylan, Ibrahim H.; Ryan, Ben; Haslam, Chris; King, Matthew; Zmijewski, Piotr; Oliveira, RafaelThis study aimed to examine physical match performance and the effects of opponent ranking and positional differences in both the English Championship League (ECL) and the English Premier League (EPL) over five consecutive seasons. Fifty-four professional outfield soccer players (average age 24.6±5.4 years, weight 76.6±6.9 kg, height 1.79±0.09 m) from an English club were involved. Physical data obtained with the 18 Hz GPS technology tracking system from 213 regular-season matchesspanning the complete 2018/19 to 2022/23 seasons were examined. The results showed that, considering the level of the opponent, total distance (TD), high-intensity distance (HSR), and the number of decelerations (DEC) significantly varied in both EPL and ECL(p < 0.05, p < 0.05, p < 0.05 respectively). Additionally, opponent level influenced sprint distances (Spr) and accelerations (ACC) in the EPL (p < 0.05, p < 0.05) but not in the ECL. The highest running metrics were noted when the team played against a high-ranked opponent. Concerning positional roles, more physical metrics were influenced by opponent level in the ECL (centre-backs (TD, ACC), full-backs (TD, DEC), centre midfielders (TD, HSR, Spr, DEC), attacking midfielders (TD, Spr, DEC), centre forwards (TD)) than in the EPL (centre midfielders (TD, HSR, DEC), attacking midfielders (TD, DEC), centre forwards (TD)). These findings contribute to a more comprehensive understanding of how players from different positions perform in elite soccer match-play against varying opposition rankings. Coaches may then tailor tactical approaches, positional, and individualized training regimens to address the specific physical demands associated with matches against different-ranked opponents.
- The positional demands of explosive actions in elite soccer: comparison of English Premier League and French Ligue 1Publication . Morgans, Ryland; Ju, Wonwoo; Radnor, John; Zmijewski, Piotr; Ryan, Ben; Haslam, Chris; King, Matthew; Kavanagh, Ronan; Oliveira, RafaelThe aims of the present study were to: (i) quantify accelerations and decelerations of soccer players during match-play acrosstwo consecutive seasonsfrom the English PremierLeague (EPL) and Ligue 1 (L1); and (ii) compare any positional differences between the two leagues. Fifty-eight male professional soccer players were monitored during all league matches (n = 144) across seasons 2020/21 and 2021/22. The absolute number of accelerations (> +3 m/s−2) and decelerations (< -3 m/s−2) and accelerations and decelerations per minute were examined. The relative number of accelerations and decelerations across all positions was higher with moderate effect sizes in the EPL when compared to L1 (p < 0.001, for both). Significant differences were observed in accelerations and decelerations across all playing positions (p < 0.001 and p = 0.001 respectively, with moderate to very large effect sizes), except for centre forwards (CF) (accelerations p = 0.40; ES = 0.16; decelerations p = 0.97; ES = 0.01). This study provides valuable insights into the positional acceleration and deceleration differences in the EPL and L1, which should be considered in match running performance evaluations. While confirming higher accelerations and decelerations in the EPL, the unique case of CF challenges current evidence, emphasising the need for a more granular understanding of the positional demands of explosive actions incorporating accelerations and decelerations in elite soccer.
- The positional demands of explosive actions in elite soccer: comparison of English Premier League and French Ligue 1Publication . Morgans, Ryland; Ju, Wonwoo; Radnor, John; Zmijewski, Piotr; Ryan, Ben; Haslam, Chris; King, Matthew; Kavanagh, Ronan; Oliveira, RafaelThe aims of the present study were to: (i) quantify accelerations and decelerations of soccer players during match-play acrosstwo consecutive seasonsfrom the English PremierLeague (EPL) and Ligue 1 (L1); and (ii) compare any positional differences between the two leagues. Fifty-eight male professional soccer players were monitored during all league matches (n = 144) across seasons 2020/21 and 2021/22. The absolute number of accelerations (> +3 m/s−2) and decelerations (< -3 m/s−2) and accelerations and decelerations per minute were examined. The relative number of accelerations and decelerations across all positions was higher with moderate effect sizes in the EPL when compared to L1 (p < 0.001, for both). Significant differences were observed in accelerations and decelerations across all playing positions (p < 0.001 and p = 0.001 respectively, with moderate to very large effect sizes), except for centre forwards (CF) (accelerations p = 0.40; ES = 0.16; decelerations p = 0.97; ES = 0.01). This study provides valuable insights into the positional acceleration and deceleration differences in the EPL and L1, which should be considered in match running performance evaluations. While confirming higher accelerations and decelerations in the EPL, the unique case of CF challenges current evidence, emphasising the need for a more granular understanding of the positional demands of explosive actions incorporating accelerations and decelerations in elite soccer.