Wyniki wyszukiwania

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The importance of agonistic, antagonist and synergistic muscles coordination on swimming dry land training

100%

Serra N., Carvalho D. D., Fernandes R. J.

Trends in Sport Sciences

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2017

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tom 24

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nr 3

The best dry land workout exercises for swimmers are those that aim to develop performance, strength and flexibility but without compromising health. As there is no “one-size-fitsall” recipe, coaches should be very cautious when choosing a dryland workout regimen. In fact, due to the swimming cyclic and continuous characteristics, overuse affects (almost) every swimmer, reinforcing the role that land workouts should have in preserving and promoting swimmers health, and not contributing to the high prevalence of shoulder, low back and knee joint injuries. As competitive swimmers of any age should avoid dry land workout mistakes (that will leave them prone to injury), we will briefly present a new trend on agonistic, antagonist and synergistic muscles coordination to be applied in strength and mobility dry land training.

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Metabolic and technical changes in swimmers during a 100-m all-out front crawl

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Almeida-Coelho J., Fernandes R. J., Vilas-Boas J. P.

Trends in Sport Sciences

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2016

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tom 23

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nr 4

Introduction. Swimming performance depends on the swimmer’s capacity to generate mechanical power and resist fatigue. As short intense exercise (up to 1 min in duration) depends heavily on anaerobic energy release, glycolytic contribution seems fundamental for performing the 50 m and 100 m swimming events. Swimming velocity is also highly dependent on swimmers’ technique, which could be assessed with stroke frequency (SR) and stroke length (SL). Aim of Study. The study aimed to analyse changes of metabolic and technical parameters in swimmers performing a maximal 100-m all-out front crawl. Material and Methods. Seven well-trained male swimmers (51.79 + 1.1 s at 100 m freestyle), performed an 100-m all-out front crawl, with intermediate velocity, SR, and SL assessed at each 25 m of the covered test distance. To estimate changes in blood lactate concentrations ([La⁻]), the blood lactate increasing speed (BLIS) methodology was used, with swimmers performing 25, 50 and 75 m front crawl bouts (controlled with a visual pacer) at the previously assessed velocities in each split of the 100 m test. [La⁻] were assessed before and immediately after each trial (until reaching the peak [La⁻]), with BLIS determined with the time rate of net [La⁻] per split. SR and SL were assessed using a video camera and a chronometer. Means and SD, Spearman’s rank correlation coefficient and ANOVA for repeated measures were used (p < 0.05) for statistical analysis. Results. The average velocity of the 100 m test was 1.89 ± 0.15 m·s⁻¹, decreasing during the first three laps (and increasing in the last 25 m), concurrently with an increase in SR and a decrease in SL. [La⁻] increased throughout the test (to 15.01 ± 1.42 mmol·l⁻¹), and BLIS diminished during the first three laps, while increasing during the last one. Conclusions. Glycolytic power determines the first 25 m lap of a maximal 100 m front crawl effort, causing fatigue effects measured with simple biomechanical parameters. A volitive effect of metabolic pathways can be observed in the last 25 m.

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Oral health in young elite swimmers

76%

Cardoso P., Monteiro A. S., Fernandes A., Vilas-Boas J. P., Pinho J. C., Pyne D. B., Fernandes R. J.

Trends in Sport Sciences

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2020

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tom 27

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nr 2

Introduction. Evidence of a lack in oral healthcare in sport has emerged since reports from Olympic Games indicated a higher risk for problems of the oral cavity. Oral diseases could affect well-being and the quality of life, with anecdotal reports that athletes are concerned about their oral conditions and potential impairment of performance. Aim of Study. Our purpose was to observe, through a clinical perspective, the orofacial development, dental relationships and oral health of young elite swimmers. Material and Methods. A cohort of 17 young elite swimmers were evaluated for skeletal and occlusion development or problems arising from gums and teeth. Results. Several conditions (e.g. pattern II, class III and crossbite) differed from the normal skeletal and dental development but most of the swimmers evaluated had a proper position of bone bases and teeth. Dental caries (n = 5) and gum-inflammatory states (n = 3) were also detected. Conclusions. Oral health status was not completely monitored in our group of elite swimmers. Strategies to prevent oral diseases and promote oral health within sport need to be developed. Good oral health practices should be a priority for athletes, clubs and sports federations.

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Integrated dynamometric, kinematic and electromyographic characterisation of a swimming track start block hhase – a pilot study

64%

Vítor M., de Jesus K., Mourão L., Tribuzi S., Gonçalves P., Marques M., Roesler H., Vaz M., Vilas-Boas J. P., Fernandes R. J.

Central European Journal of Sport Sciences and Medicine

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2016

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tom 15

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nr 3

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Neuromuscular and autonomic responses during a CrossFit® competition: a case study

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Maia N. M., Kassiano W., Assumpcao C. O., Andrade A. D., Fernandes R. J., De Jesus K., Simim M. A. M., Medeiros A. I. A.

Trends in Sport Sciences

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2019

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tom 26

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nr 4

Introduction. The number of sports practitioners engaged on extreme physical conditioning programs has been growing exponentially in the last decades. However, the information about participating in competitions on their physiological systems is scarce. Aim of Study. This study aimed to evaluate the neuromuscular and autonomic responses of CrossFit® practitioners in a competition. Material and Methods. Three subjects (with 17 months of experience) were monitored during a two consecutive days competition. Participants performed five events (three on the first day and two on the second one) composed of body weight exercises, Olympic weightlifting and aerobic activities. Neuromuscular performance and autonomic response were assessed through countermovement jump and heart rate variability (respectively). Results. Subject A has decreased in 8% his countermovement jump and heart rate variability values from pre-day 1 to the end of the competition. Subject C have showed a decreasing of the –4.0% on the vertical impulse of countermovement jump height at the end of the competition. Therefore, two CrossFit® competition consecutive days negatively influenced neuromuscular and autonomic function of the male practitioner. Conclusions. By characterizing the behavior of internal and external load variables of CrossFit® practitioners during a competition, it was evidenced that monitoring strategies provide data that favor a better decision making on the need recovery strategies during and after a CrossFit® competition.

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Representativeness of offensive scenarios to evaluate perceptual-cognitive skills of water polo players

64%

Casanova F., Pereira R., Canossa S., Padilha M., Bagatin R., Teoldo I., Gonzalez-Villora S., Fernandes R. J., Tavares F.

Central European Journal of Sport Sciences and Medicine

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2020

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tom 29

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nr 1

Ograniczanie wyników

The importance of agonistic, antagonist and synergistic muscles coordination on swimming dry land training

Metabolic and technical changes in swimmers during a 100-m all-out front crawl

Oral health in young elite swimmers

Integrated dynamometric, kinematic and electromyographic characterisation of a swimming track start block hhase – a pilot study

Neuromuscular and autonomic responses during a CrossFit® competition: a case study

Representativeness of offensive scenarios to evaluate perceptual-cognitive skills of water polo players