Percorrer por autor "Ouerghi, Nejmeddine"
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- Effect of 12 weeks differential learning vs. classical learning approaches on motor skills related to shot put in healthy young adultPublication . Fadhlaoui, Hassen; Jebabli, Nidhal; Hattabi, Soukaina; Salhi, Iyed; Boughanmi, Dhaoui; Ouerghi, Nejmeddine; Forte, Pedro; Sortwell, Andrew; Ferraz, Ricardo; Branquinho, Luis; Teixeira, José Eduardo; Afonso, Pedro; Ribeiro, Joana; Malheiro, Alexandra; Rocha, Alberto; García-Perales, Ramón; Abderrahman, Abderraouf BenThe objective of this study was to compare the effect of 12-weeks of differential learning intervention vs. classical learning in the shot-put for healthy and physically active students. Methods In this study, 114 sports science students (64 males; 50 females; age 21.20 +/- 2.15 years; body mass: 67.42 +/- 12.30 kg; body height: 1.73 +/- 0.09 m; BMI: 22.61 +/- 1.20 kg.m-1) participated in this study. A total of 114 students completed the study. Students were divided into a differential learning group (DL) (n = 40), a classical learning group CL (n = 39) and a control group (CG) (n = 35). Both DL and CL groups completed a similar 12-weeks learning program with four intervention assessment: shot put test, medicine ball throw, vertical jump tests, five jump test, flexibility test and sprint test. Results The results showed that the DL and CL programs significantly improved physical performance (p < 0.05) compared to the control group, with the effect size more effective in the DL group than in the CL group after the sixth week (shot-put throw: d(DL) = 0.30), 12 week [shot-put throw: d(DL) = 0.49, d(CL) = 0.18; throw MB kneeling: d(DL) = 0.41; throw MB standing: d(DL) = 0.89; vertical and horizontal tests: d(DL) = (0.55-1.39); sprint tests: d(DL) = (0.57-0.71)] and after retention period (14(th) week) (shot put, d(DL) = 0.28; standing MB throw: d(DL) = 0.48) of learning program. Also, there was a significant improvement for 5JT (p = 0.026; d = 1.29) performances in the DL group compared to CL group 12 week after learning program. However, no significant group*time interaction was observed for the feeling scale. Conclusions Overall, the data suggests that 12-weeks of DL program was more effective and more sustainable than CL in improving technical and physical performance related to shot-put discipline.
- Normative reference and cut-offs values of maximal aerobic speed-20 m shuttle run test and maximal oxygen uptake for Tunisian adolescent (elite) soccer playersPublication . Ghouili, Hatem; Dridi, Amel; Ouerghi, Nejmeddine; Ben Aissa, Mohamed; Bouassida, Anissa; Guelmami, Noomen; Sortwell, Andrew; Branquinho, Luís; Forte, Pedro; Dergaa, IsmailThis study aimed to develop reference curves of aerobic parameters of 20 m shuttle run test for Tunisian soccer players. The study was conducted in the 2022/2023 pre-season. The reference curves of the maximal aerobic speed (MAS) and the maximal oxygen uptake (VO2max) were developed according to the Lambda, Mu and Sigma (LMS) method, using data from 742 Tunisian premier league soccer players aged 11–18 years. Measured variables included: weight, height, body mass index and maximal heart rate (HRmax). HRmax was measured when the participants completed the maximal aerobic speed. VO2max was estimated using the 20 m shuttle run test protocol (speed increment every minute). Our results presented the smoothed percentiles (3rd, 10th, 25th, 50th, 75th, 90th and 97th) of MAS (km/h) and VO2max (ml/kg•min⁻1) according to age. In addition, raw data showed that VO2 max was positively correlated with age (r = 0.333; P < 0.001), height (cm) (r = 0.279; P < 0.001), weight (kg) (r = 0.266; P < 0.001), practice period (years) (r = 0.324; P < 0.001) and BMI (kg/m2) (r = 0.10; P < 0.05). However, it was negatively correlated to HRmax (bpm) (r = 0.247; P < 0.001). Only the measurements within the age group [12–12.99] are significantly higher (p < 0.001; ES = 0.63) compared with the previous age group [11–11.99]. Finally, regarding prevalence, our findings showed that 15.5 % of the players in our sample had VO2max values above the 87.7th percentile cut-off, while only 0.3 % exceeded the 99.18th percentile. The development of normative curves could help coaches and physical trainers to more accurately detect weaknesses in the aerobic performance of their players in order to sustain high-intensity repetitive actions during a soccer match.
- The fastest 24-hour ultramarathoners are from Eastern EuropePublication . Knechtle, Beat; Valero, David; Villiger, Elias; Scheer, Volker; Weiss, Katja; Forte, Pedro; Thuany, Mabliny; Vancini, Rodrigo Luiz; Lira, Claudio A.B. de; Nikolaidis, Pantelis Theo; Ouerghi, Nejmeddine; Rosemann, ThomasUltramarathon running is of increasing popularity, where the time-limited 24-hour run is one of the most popular events. Although we have a high scientific knowledge about different topics for this specific race format, we do not know where the best 24-hour runners originate from and where the fastest races are held. The purpose of the present study was to investigate the origin of these runners and the fastest race locations. A machine learning model based on the XG Boost algorithm was built to predict running speed based on the athlete´s age, gender, country of origin and the country where the race takes place. Model explainability tools were used to investigate how each independent variable would influence the predicted running speed. A sample of 171,358 race records from 63,514 unique runners from 73 countries participating in 24-hour races held in 57 countries between 1807 and 2022 was analyzed. Most of the athletes originated from the USA, France, Germany, Great Britain, Italy, Japan, Russia, Australia, Austria, and Canada. Tunisian athletes achieved the fastest average running speed, followed by runners from Russia, Latvia, Lithuania, Island, Croatia, Slovenia, and Israel. Regarding the country of the event, the ranking looks quite similar to the participation by the athlete, suggesting a high correlation between the country of origin and the country of the event. The fastest 24-hour races are recorded in Israel, Romania, Korea, the Netherlands, Russia, and Taiwan. On average, men were 0.4 km/h faster than women, and the fastest runners belonged to age groups 35–39, 40–44, and 45–49 years. In summary, the 24-hour race format is spread over the world, and the fastest athletes mainly originate from Eastern Europe, while the fastest races were organized in European and Asian countries.