Artigos em revistas internacionais - ESDRM
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- Comparisons of running and accelerometry based measures between playing positions in touch rugby. A case study of an amateur male teamPublication . Oliveira, Rafael; Nalha, MatildeBackground: The main objective of the present study was to quantify the external load of the games that belong to a national tournament by comparing playing positions. A secondary objective consisted in comparing the match-to-match variations. Methods: Fourteen players (four links, four middles and six wings) were included (age: 39.36 ±5.83 years; body mass index: 26.65 ± 4.13). Participants were monitored during a tournament. ThroughGpexepro2, thefollowingmeasureswerecollectedandrelativized per minute: total distance, forward distance, backward distance, zone 1 (0–1.50 m/s), zone 2 (1.50–3.00 m/s), zone 3 (3.00–4.00 m/s), zone 4 (4.00–5.50 m/s), zone 5 (5.50 7.00 m/s)andzone6(>7.00m/s),thenumberofaccelerationsanddecelerations, impacts and jumps. The absolute values of maximal speed, maximal acceleration speed and maximal deceleration speed were also used for analysis. Results: The main findings showed meaningful higher values of zone 4 (16.18 ± 1.89 vs. 5.56 ± 3.53), zone 5 (2.91 ± 0.81 vs. 0.38 ± 0.38), zone 6 (0.35 ± 0.24 vs. 0.00 ± 0.00), deceleration (0.56 ± 0.21 vs. 0.19 ± 0.12), maximal speed (23.56 ± 1.90 vs. 18.84 ± 1.24) and forward distance (102.20 ± 13.45 vs. 67.42 ± 17.40) for middles than wings (p < 0.05), with large to very large effect sizes. In addition, no differences were found when comparing external load data from all matches. Conclusions: The findings of this study showed a clear tendency of higher values for middles than links and wings which provides a deeper understanding of the positional activity profile of an Amateur Portuguese team allowing practitioners to adjust training with the common external load experienced in a tournament. Moreover, the analysis of match-to-match comparison revealed no differences through the competition day, which means a proper fatigue management.
- Concurrent validity and reliability of global positioning systems for measuring intense running and peak speed performance: a systematic reviewPublication . Hadi Nobari; Alexandre Duarte Martins; João Paulo Brito; Elena Mainer-Pardos; Pablo Valdés-Badilla; Rafael Oliveira; RafaelThe current systematic review aimed to analyse studies on the concurrent validity and reliability of microelectromechanical devices for measuring intense running and peak speed performance. A systematic review was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, using EBSCO, PubMed, Scielo, Scopus, SPORTDiscus and Web of Science. Keywords and synonyms were entered in various combinations in the title, abstract, or keywords: (“Global positioning system” OR “Global Navigation Satellite System” OR “GPS”) AND (Validity OR Accuracy OR Reliability OR Precision OR Repeatability OR Reproducibility OR Consistency) AND (“sprint” OR “peak speed” “top seed” OR “maximal speed”). The risk of bias was assessed using the Appraisal tool for Cross-Sectional Studies. From 839 studies, 20 were systematically analysed. It was found that 16 global positioning system (GPS) models were considered valid and 12 were considered reliable for measuring intense running and/or peak speed performance. Intense running performance in GPS with lower sampling rate (e.g. ≤ 5 Hz) acquisition demonstrated reduced validity and reliability in nonlinear movement patterns as well as movement intensity increases. Some limitations of the evidence, including the conditions associated with exercise testing and the benchmark and device used, varied between studies. In addition, the data of the algorithms used by GPS can affect the interpretation of the results. Thus it would be advisable to use higher sampling rates.
- Sequencing effects of small-sided games and high-intensity interval training on physical and physiological performance of young soccer players during pre-seasonPublication . Kharatzadeh, Masoud; Morgans, Ryland; Thapa, Rohit K.; Oliveira, Rafael; Faramarzi, Mohammad; Oliveira, RafaelStudy aim: This experimental study investigated the sequencing effects of a small-sided games (SSG) protocol and high intensity interval training (HIIT) on the physical and physiological performance adaptation of soccer players, conducted over a fourteen-week of the pre-season. Materials and methods: Twenty-three young (aged 14 ±0.1 years) male soccer players from a club participating in national level competitions were randomly divided into two groups (SSG + HIIT, n = 11 and HIIT + SSG, n = 12). The first group completed SSGs (5 vs. 5 + goalkeeper, 36 × 30 m) followed by HIIT (long interval at 60 to 75% of final velocity during 30–15 intermittent fitness test) training, while the second group performed HIIT training and then SSGs. Assessments were conducted at baseline and post-intervention for 10 m linear sprint, body fat percentage, countermovement jump (CMJ), change of direc tion speed (CODS), squat jump (SJ), and Yo-Yo intermittent recovery test (Yo-Yo IR). Results: A significant main effect of time was reported for 10 m linear sprint, CMJ, CODS, SJ, and Yo-Yo IR (p ≤ 0.001–0.010, ηp 2 = 0.32–0.74). However, no significant group × time interaction were reported for any dependent variables (p = 0.433–1.000, ηp 2 ≤ 0.01–0.03). Conclusion: The sequencing order of HIIT and SSG does not affect the performance outcomes in young male soccer players. Moreover, similar improvements can be expected in the 10 m linear sprint, CMJ, CODS, SJ, and Yo-Yo IR, irrespective of the exercise order. However, caution should be taken when interpreting the within-group improvements, as the study did not include a control group.
- Effective techniques analysis in taekwondo: a systematic reviewPublication . Sousa, José L.; Gamonales, José M.; Hernández-Beltrán, Víctor; Louro, Hugo; Ibáñez, Sergio J.The Korean martial art Taekwondo has been an official Olympic sport since the 2000 Sydney Olympics. Taekwondo is a full contact combat sport where the majority of successful techniques are powerful kicks, which are delivered by hitting the opponent’s chest gear or the head. The aims of this research were: a) carry out a systematic review related to the effective techniques in Taekwondo, and b) know the must use techniques in taekwondo combat. The review was conducted according to the PRISMA-P protocol. The Web of Science, Scopus and SPORTDiscus electronics databases were explored for pertinent published studies according to the following key words: “Taekwondo” and “Technique”, published up to 31st August 2023. To boundary the search, four inclusion criteria were admit ted: i) select only documents from scientific journals, ii) mention at least some of the techniques of Taekwondo (minimum 50 words), iii) journal documents published in English, Spanish and Portuguese, and iv) full text accessible or abstract availability. The sample consisted of 17 documents. In conclusion, the selected documents have allowed the identification and highlighting of different kinds of documents, which report the study of taekwondo associated with technique. The technique most studied in taekwondo is the round house kick (Korean terminology: “bandal chagui” - kick to the chest gear or “dollyo chagui” - kick to the helmet gear).
- Detraining and retraining effects from a multicomponent training program on the functional capacity and health profile of physically active prehypertensive older womenPublication . Leitão, Luis; Campos, Yuri; Louro, Hugo; Figueira, Ana Cristina Corrêa; Figueiredo, Teresa; Pereira, Ana; Conceição, Ana; Marinho, Daniel A.; Neiva, Henrique P.Background: Resuming a physical exercise program after a period of cessation is common in older women. Monitoring the responses during this detraining (DT) and retraining (RT) may allow us to analyze how the body reacts to an increase and a reduction in physical inactivity. Therefore, we conducted a follow-up training, DT, and RT in prehypertensive older women to analyze the response to these periods. Methods: Twenty-three prehypertensive older women (EG; 68.3 ± 2.8 years; 1.61 ± 0.44 m) performed 36 weeks of the multicomponent training program (MTP) followed by twelve weeks of DT plus eight weeks of RT. Fifteen prehypertensive older women (CG; 66.3 ± 3.2 years; 1.59 ± 0.37 m) maintained their normal routine. Functional capacity (FC), lipid, and hemodynamic profile were assessed before, during 24 and 36 weeks of the MTP, after 4 and 12 weeks of DT, and after 8 weeks of RT. Results: After 24 weeks of the MTP, only SBP did not improve. Four weeks of DT did not affect lower body strength (30-CS), TC, or GL. Eight weeks of RT improved BP (SBP: −2.52%; ES: 0.36; p < 0.00; DBP: −1.45%; ES: 0.44; p < 0.02), handgrip strength (3.77%; ES: 0.51; p < 0.00), and 30-CS (3.17%; ES: 0.38; p < 0.04) compared with 36 weeks of the MTP. Conclusions: Eight weeks of RT allowed patients to recover the benefits lost with detraining, which after only four weeks affected them negatively, and the systematic practice of exercise contributed to greater regulation of BP since 24 weeks of the MTP proved not to be enough to promote positive effects of SBP.
- Sprint performance determinants in high level young swimmersPublication . Matos, Carolina L.; Conceição, Ana; Louro, Hugo; Neiva, Henrique P.; Sobreiro, Pedro; Viana, Bárbara L.; Marinho, Daniel A.Background: Identifying and evaluating the variables that influence performance are essential for obtaining excellence in sport. Objective: This study aimed to identify which parameters have the most influence on the 50 meters freestyle time in young competitive swimmers. Methods: One hundred and eighty-four high-level swimmers (males, n=92: 14.60±0.56 years; females, n=92: 13.53 ± 0.54 years) with 468±66 FINA points in the 50 meters freestyle short course participated in this study. Age, height, body mass, wingspan, stroke rate, stroke length, stroke index, turning time (5 m + 10 m), horizontal jumping, and medicine ball throwing were assessed. The swimming performance was assessed in a 50 meters freestyle time trial at maximum speed in a 25 meters swimming pool. Multiple regression was performed to assess the relationship between one dependent variable (50 meters freestyle time) and independent variables. Results: The results showed significant differences between both the genders. In male swimmers, only the turning time and the horizontal jump were significant (r2 =0.8819; p<0.001), while females, besides the same variables, presented significant results in terms of height, body mass, stroke length, and stroke index (r2 =0.9013; p<0.01). Conclusion: In conclusion, in young male swimmers, the turning time and the horizontal jump contributed significantly to the 50 meters freestyle swimming performance, and in young female swimmers, the main contributors were the turning time, horizontal jump, height, body mass, stroke length, and stroke index.
- Can acute mobilization and oscillation training profit on the joint position sense and strength of the rotator cuff muscles in young tennis players?Publication . Molaee, Faeze; Shahmir, Mohammad; Oliveira, Rafael; Mohammadi Nia Samakosh, Hadi; Hajrezaee, Behnaz; Sarvari Far, Behrooz; Paolo Ardigò, Luca; Badicu, GeorgianThe rotator cuff is a group of muscles and tendons that act to stabilize the human shoulder and allow for its extensive range of motion. This study aimed to compare the immediate effect and durability of mobilization and oscillation dumbbell (OD) training on the Joint Position Sense (JPS) and strength of rotator cuff muscles in young tennis players. Twenty-six tennis players were divided into two experimental groups. G1 only performed mobilization techniques while G2 only performed OD training, before, after and after one week of the protocols, the strength and JPS of the shoulder joint were measured with an isokinetic dynamometer. Repeated analysis of variance (RMANOVA) and Bonferroni post hoc test were used to examine the differences between the groups. The analysis of covariance was used to examine the differences between the groups. In general, the results showed a significant effect of both mobilization techniques and OD training programs on the JPS and internal and external rotation strength of young tennis players, but only one difference was observed between the two in external rotation for the eccentric/concentric action at 120°/sec (p=0009; ƞ2p= 0.32). Moreover, the main findings showed that mobilization techniques and OD improved internal and external rotations after the protocol and after one week when compared with baseline for the concentric/concentric and eccentric/concentric at 60°/sec and 120°/sec (p < 0.05) with only one exception for the internal rotation concentric/concentric at 120°/sec for both groups (p > 0.05). Based on this, it seems that in healthy tennis players, both one-session mobilization techniques and OD training can be used to improve JPS and strength.
- A comprehensive review of the effects of cherry juice and chocolate milk supplementation on football performance and recoveryPublication . Morgans, Ryland; Lee, DONGYOON; DI VIRGILIO, Thomas; Ryan, Ben; Oliveira, RafaelBackground: Football matches and training sessions can induce metabolic and mechanical stress, leading to inflammation, oxidative stress, and muscle damage, all of which may negatively impact subsequent performance. Montmorency tart cherry, rich in phytochemicals and anthocyanins, is believed to aid in recovery and alleviate muscle soreness. Similarly, chocolate milk may promote glycogen synthesis, protein synthesis, and rehydration. The aim of this study is to review the effects of cherry juice and chocolate milk on athletes and summarize results to inform future research on football recovery. Methods: This comprehensive review identified relevant literature through an extensive search of the PubMed, Scopus, ScienceDirect, and SPORTDiscus databases, using combinations of keywords related to cherry juice, chocolate milk, and exercise. Studies were selected based on specific inclusion and exclusion criteria. Results: A total of 372 studies were identified through the search [Cherry juice: n = 137; Chocolate milk: n = 235]. After assessing eligibility, 27 studies were included based on the inclusion and exclusion criteria [Cherry juice: n = 14; Chocolate milk: n = 13]. These studies investigated the effects of cherry juice and chocolate milk on various aspects of post-training or post-competition recovery, including muscle damage, inflammation, oxidative stress, and physical performance in athletes from different sports. Conclusion: Based on the reviewed literature, the ingestion of cherry juice and chocolate milk has the potential to reduce muscle damage and soreness and enhance recovery after exercise and physical activities in athletes from various sports. These positive results suggest that cherry juice and chocolate milk may also benefit football players as recovery strategies. However, further research is needed to determine the optimal dosage, timing, and duration of supplementation, as well as the long-term effects on recovery and performance in football-specific contexts.
- 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.
- Differential Effects of Verbal Coaching Cues and Analogies on Sprint Performance in Youth Male Soccer Players Across Grass and Indoor SurfacesPublication . Nebigh, Ammar; Hammami, Raouf; Stefanica, Valentina; Murathan, Talha; Ozdemir, Kubra; Yildiz, Mevlut; Oliveira, Rafael; Mahmoud, Abdelkader; Ibrahim Ceylan, Halil; Ioan Muntean, RaulThere is a limited body of research concerning the impact of different attentional foci on the performance or retention of fundamental motor skills in young individuals. Additionally, the influence of verbal cues on sprint performance across various surfaces, such as grass and indoor basketball courts, remains understudied. Therefore, the primary objective of this study was to assess the effectiveness of Internal Cues (IC), External Cues (EC), and analogies with a directional component (ADC) on sprint performance among youth soccer players on different surfaces (grass vs. indoor basketball court). Seventy participants, aged 12.3±0.5 years, with a maturity offset of -0.9±0.5 years, were recruited for this investigation. Multiple 20-meter sprint tests were conducted on both grass and indoor basketball courts using different coaching cues: a control/neutral cue, an internal cue, an external cue, and analogies (away and toward). The analyses did not reveal significant differences (p ≥ 0.05) between cue types for both sprinting on grass and indoor surfaces. However, in post-hoc analyses for indoor sprints, significant distinctions were noted between ECs and ICs, favoring ECs (p < 0.01), as well as between "away" ADC and IC, favoring the "away" ADC (p < 0.01). Similar significant differences were observed for grass sprints, with ECs and "away" ADCs showing superiority over ICs (p < 0.01). 2 2024 37(11 ) In conclusion, the study did not find evidence supporting specific instructional types' positive impact on youth's sprint performance on both grass and indoor surfaces. Notwithstanding, ECs and ADCs seemed to be more effective coaching strategies for improving sprinting performance in youth soccer players. Additionally, motivating young soccer players to give their maximum effort seemed to be a beneficial cueing method for enhancing sprint ability on different surfaces.