Browsing by Author "Navandar, Archit"
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Item Characteristics of Very High Intensity Runs of Soccer Players in Relation to Their Playing Position and Playing Half in the 2013-14 Spanish La Liga Season.(Journal of Human Kinetics, 2019) Rivilla García, Jesús; Calvo, Luis Carlos; Jiménez Rubio, Sergio; Paredes Hernández, Víctor; Muñoz Moreno, Alejandro; Van den Tillaar, Roland; Navandar, ArchitThe objective of this study was to carry out a detailed quantitative analysis of the very high intensity runs during actual play in the 2013-2014 Spanish First Division, at a general level and according to the specific playing position and half. 380 matches of the Spanish First Division in the 2013 - 2014 season were monitored using the Mediacoach video motion analysis tool. Total distance, very high intensity (above 21 km/h) running distance and the number of runs at very high intensity of 230 players from 20 teams in the Spanish First Division were analysed. The main findings of the study were that the performance indicators at very high intensities decreased from the first half to the second half for all outfield players (covered distance: 4694 ± 538 m vs 4485 ± 437 m, sprint distance: 256 ± 72 m vs 239 ± 67 m, number of sprints: 14.3 ± 3.5 vs 13.2 ± 3.1), except the central defenders (sprint distance: 166 ± 37 vs 166 ± 40 m, number of sprints: 10.0 ± 2.1 vs 9.8 ± 3.8). Secondly, although wide defenders (9759 ± 665 m) and central midfielders (9776 ± 942 m) covered the most distance during matches, it were the wide defenders (30 ± 5), centre-forwards (28 ± 7) and wide midfielders (31 ± 8) who performed the most runs at very high intensity. Consequently, the distance they ran at these very high intensity runs followed the same pattern. Such results enable general and specific profiles by demarcation to be established based on the demands of the game at high-level competitive play.Item Effects of Consecutive Matches on Isometric Hamstring Strength, Flexibility Values and Neuromuscular Performance in Female Field Hockey Players. A Prospective, Observational Study.(Applied Sciences, 2021) Sánchez Migallón, Violeta; Moreno-Pérez, Victor; López-Samanes, Alvaro; Fernández Ruiz, Vicente; Gaos, Sofía; Díaz-Maroto, José Bernardo; Van den Tillaar, Roland; Navandar, ArchitThis study aimed to analyze the effects of match congestion in a short period on isometric hamstring strength and hip/ankle range of motion in female field hockey players. Fourteen professional female field hockey players (age: 20.0 5.4 years) played two consecutive hockey matches in 24 h and maximal isometric hamstring strength and hip and ankle range of motion were obtained before and after the first match, after the second match, and 48 h after the second match. Furthermore, locomotion patterns and ratings of perceived exertion were recorded during hockey competitions. Isometric knee flexion strength showed significantly higher values 48 h after the second match for the non-dominant limb (p 0.005, p2 = 0.19), while no differences were reported in the dominant limb (p = 0.370, p2 = 0.05). In addition, no differences were reported in the range-of-motion (ROM) variables such as the straight leg raise test or ankle dorsiflexion test (p = 0.075–0.217, p2 = 0.01–0.03). The countermovement jump height steadily increased over the matches except between post-match 2 and 48 h after post-match 2 (p < 0.001, 2 = 0.382). Two consecutive official league field hockey matches played within 24 h did not have a negative effect on lower-limb risk factors (strength, hip and ankle ranges of motion, and ratings of perceived exertion) in female field hockey players directly, but they improved 48 h after the matches. This could indicate that 48 h recovery period following matches might be ideal for female field hockey players.Item Influence of the opposition on overhead smash velocity in padel players.(Kinesilogy, 2019) Rivilla García, Jesús; Muñoz Moreno, Alejandro; Lorenzo, Jorge; Van den Tillaar, Roland; Navandar, ArchitAlthough it is well established that velocity of execution is an important performance factor in ball sports and the presence of opposition influences it, there has been no research done to date on the ball velocity in padel shots. The overhead smash is one of the most successful shots in this sport, and the present study aimed to study the effect of opposition on smash performance in semi-professional and amateur padel players. Forty-four semi-professional (n=14) and amateur (n=30) players volunteered to participate in this study. The overhead smash velocity was recorded for both groups of players with and without opposition using a radar gun. The ball velocity decreased in both groups of players in the presence of opposition (from 133.1±8.2 km·h-1 to 120.72±9.8 km·h-1 in semi-professional players; and from 124.6±9.2 km·h-1 to 104.5±10.0 km·h-1 in amateurs, p<.001). Although the semi-professional players achieved a greater velocity in both situations (p<.001) compared to amateurs, the reduction of velocity in the presence of opposition was greater in the amateurs (p<.001). The greater velocities for the semi-professional padel players could be attributed to a technical and tactical superiority due to their greater experience and higher level of competition. Simulating conditions of opposition could help reduce the velocity-precision trade-off, helping the players increase their overhead smash velocities.Item Monitoring modifiable injury risk factors over an in-season mesocycle in semi-professional female field hockey players.(BMC Sports Science, Medicine and Rehabilitation, 2024) Sánchez Migallón, Violeta; Moreno Pérez, Víctor; Terrón Manrique, Pablo; Fernández Ruiz, Vicente; Blake, Catherine; Navandar, Archit; López Samanés, ÁlvaroObjective This study aimed to determine changes of modifiable injury risk factors and fatigue parameters during a mesocycle (4 months of the competitive season) in semi-professional female field hockey players (Spanish 2nd Division). Methods Fourteen female field hockey players (age: 22.6 ± 4.9 years) participated in the study over 4 months of the competitive season (September–December 2019). The players were tested each month for their: maximal isometric knee flexion, hip adduction, and abduction muscle strength; passive straight leg raise and ankle dorsiflexion range of motion (ROM); countermovement jump height; and perceptual fatigue (through a perceived well-being questionnaire). Results Statistical differences were reported in isometric knee flexion torque in the dominant and non-dominant limb (p = < 0.001, ηp2 = 0.629,0.786 respectively), non-dominant isometric hip abductors torque (p = 0.016, ηp2 = 0.266) and isometric hip adductors torque in dominant and non-dominant limbs (p = < 0.001, ηp2 = 0.441–546). Also, significant differences were reported in the straight leg raise test (p = < 0.001, ηp2 = 0–523, 0.556) and ankle dorsiflexion (p = 0.001, ηp2 = 0.376, 0.377) for the dominant and non-dominant limb respectively. Finally, the jump height measured showed significant differences (p = <.001, ηp2 = 0.490), while no differences were reported in perceived well-being parameters (p = 0.089–0.459). Conclusion Increments in isometric muscle strength and fluctuations in ROM values and vertical jumping capacity are reported over an in-season mesocycle (i.e., 4 months of the competitive season). This information can be used to target recovery strategies to make them more efficient.Item Race Strategies of Open Water Swimmers in the 5-km, 10-km, and 25-km Races of the 2017 FINA World Swimming Championships.(Frontiers in Psychology, 2019) Veiga, Santiago; Rodríguez, Luis; González Frutos, Pablo; Navandar, ArchitDespite literature on the pacing strategies of endurance sports, there is an existing lack of knowledge about the swimmers’ tactical decisions in the open water races. The aims of the present research were (1) to compare the pacing profiles and tactical strategies of successful elite open water swimmers (men and women) in the 5-km, 10-km, and 25-km races and (2) to relate these pacing strategies to the end race results. Intermediate split times, positions and gaps with leaders of the first ten swimmers classified in the 2017 FINA World Swimming Championships races were collected from the public domain and were related to the finishing positions. Overall swimming velocities of the 5-km races were faster than the 10-km (d 0.03 0.03 m/s) and the 25-km (d 0.14 0.01 m/s) events with male swimmers achieving relatively faster mean velocities than females in the 5-km (d 0.12 0.01 m/s) compared to the 25-km (d 0.08 0.01 m/s) events. Medallist swimmers achieved moderate faster overall velocities than finalists in the 25- km races (0.01 0.01 m/s) only. Inter-level differences were detected in selected splits for each race distance. Pacing profiles presented lap to lap velocity improvements in the 5-km and men’s 10-km races (from C0.02 0.00 to C0.11 0.01 m/s) but also midrace decreases in the women’s 10-km and on the 25-km races. Successful swimmers were located in the leading positions of the 5-km races but at mid-group in the first part of the 10-km and 25-km races, with time gaps with leaders of 15–20 s. Faster lap swimming velocities, mid-race leading positions and shorter time-gaps were only related to the finishing positions in the last lap of the 10-km and in the three last laps of the 25-km events, but also in the first lap of the women’s 5-km race. Despite different midrace positioning, successful open water swimmers typically presented negative pacing profiles, a consistent control of mid-race gaps with leaders (15–20 s maximum) and great spurts (4–6% faster than mean race velocities) at the end of races. Coaches and swimmers should be aware of the different race dynamics depending to the event distance in order to select optimal race strategies.Item The Acute Effect of Match-Play on Hip Isometric Strength and Flexibility in Female Field Hockey Players.(Applied Sciences, 2020) Sánchez Migallón, Violeta; López Samanés, Álvaro; Terrón Manrique, Pablo; Morencos Martínez, Esther; Fernández Ruiz, Vicente; Navandar, Archit; Moreno Pérez, VíctorThe aim of this study was to determine the acute effect of simulated field hockey match-play on isometric knee flexion, adductor (ADD) and abductor (ABD) strength, adductor/abductor (ADD/ABD) strength ratio, countermovement jump height (CMJ), hip flexion and ankle dorsiflexion range of motion (ROM). Thirty competitive female field hockey players (23.0 ± 3.9 years old) participated in the study. Apart from the afore-mentioned variables, external (through GPS) and internal load (through RPE) were measured before (pre-match) and immediately after simulated hockey match-play (post-match) in both limbs. Isometric knee flexion strength (+7.0%, p = 0.047) and hip flexion ROM (+4.4%, p = 0.022) were higher post-match in the non-dominant limb, while CMJ values reduced (−11.33%, p = 0.008) when comparing from pre-match data. In addition, no differences were observed for isometric hip ADD, ABD, ADD/ABD strength ratio, passive hip flexion ROM and ankle dorsiflexion ROM test. A simulated field-hockey match produces an increment in hip isometric strength and hip flexion ROM values in the non-dominant limb and a decrease in jump height capacity. As a result, CMJ assessment should be considered post-match in order to identify players who would require further rest before returning to training.