INTRODUÇÃO Variáveis como a força determinam o sucesso desportivo. É reconhecido que os programas de treino fora de água são uma prática comum na natação, independentemente da idade ou nível ...competitivo (Amaro et al., 2017). O objetivo do presente estudo foi analisar a relação entre a força e potência dos membros inferiores, bem como flexibilidade, com o desempenho no salto e nado crol até aos 15 m. MÉTODOS 16 nadadores foram divididos em dois grupos com o mesmo número de atletas, controlo (GC) e teste (GT) (15±1.41 anos de idade, 1.67±0.07m de altura e 65.25±5.54kg de peso vs 17.50±1.93 anos de idade, 1.72±0.11m de altura e 63.06±5.78 kg de peso, respetivamente GC e GT). Na avaliação inicial e final foram utilizadas uma balança de bioimpedância (Tanita BC 420S MA, Japan), realizado o teste sit and reach e alcançar atrás das costas para avaliação da flexibilidade, sistema Ergojump System (Byomedic, SCP, Barcelona, Spain) para análise do salto em contramovimento (SCM) e realizou-se lançamento de bola medicinal de 3kg a partir da posição sentado em cadeira (LMB), para avaliação de potência dos membros superiors. Para análise biomecânica do salto foram utilizadas duas máquinas de filmar (câmera Leica de um Huawei Mate 9 e GoPro Hero 5 Black Edition, esta última dentro de água) de acordo com os procedimentos definidos por Rejman et al. (2017). Cada nadador realizou três partidas em grab start, registando-se o valor médio de entrada na água (distância) e registo cronométrico aos 15 m. O treino do GT teve como ênfase a força explosiva e flexibilidade durante um período de 10 semanas (2x/semana; 6-7 exercícios específicos). Os dados foram analisados com software SPSS 25 e Kinovea. Para comparação entre grupos foi utilizado o teste t de amostras emparelhadas (p≤0.05). RESULTADOS Verificaram-se diferenças estatisticamente significativas no SCM (33.7+11.65 vs 37.21+11.32m, p<0.01 respetivamente pré e pós teste) e LBM (4.43+1.18 vs 4.66+1.09m, p<0.05 respetivamente pré e pós teste). Ao nível da flexibilidade, também foram observadas diferenças estatisticamente significativas nos membros inferiores (11.06+12.15 vs 12.88+9.91m, p<0.05 respetivamente pré e pós teste) e membros superiores (10.81+4.09 vs 14.44+6.19m, p<0.01 respetivamente pré e pós teste). Relativamente ao salto, observaram-se diferenças estatisticamente significativas na distância de entrada na água (2.86+0.29 vs 3.04+0.33m, p<0.01 respetivamente pré e pós teste) e registo cronométrico aos 15 m (8.57+0.90 vs 8.35+0.69seg, p<0.05 respetivamente pré e pós teste). CONCLUSÕES Um treino específico fora de água com duração de 10 semanas promove a melhoria de capacidades físicas, nomeadamente força, flexibilidade e potência, com melhorias mais significativas ao nível da força e potência nos membros inferiores e flexibilidade nos membros superiores. A nível do salto, a melhoria mais significativa foi observada relativamente à distância de entrada na água, comparativamente ao desempenho em nado crol até aos 15 m. Concluímos que 10 semanas de treino potenciam a melhoria do desempenho no salto, mas o desempenho cronométrico no nado crol até aos 15m está associado à necessidade de treino em contexto específico, na água.
INTRODUÇAO Os resultados demostram que quando comparados os dois membros a mesma cadencia as forças produzidas apenas diferem na AbdHoriz, o que hipoteticamente sugere a presença de assimetrias nessa ...fase, que pode ser devido a um menor controlo motor e/ou fragilidade dos músculos posteriores. Por outro lado, quando comparada a força entre cadencias verifica-se um aumento da força e uma tendencia para manutençao na % AForça a cadencias mais elevadas.
Master competitions are no longer an extension of recreational sports as in the past, although, physiological and muscular changes are underlying reasons that can explain that swimming performance ...declines with age. The aim of this study was to analyze the effect of 12 weeks of training in master swimmers and the relationship to swimming performance. Improvements in dry-land tests were observed between pre and post-test, no significant statistical differences were verified, namely in countermovement jump (28.5±3.6 vs 29.5±6.1 cm) and medicine ball throwing (4.2±0.9 vs 4.5±0.9 m). In master swimmers, 12 weeks of training improve swimming performance and strength, although the last one was not statistically significant which indicates that a specific dry-land strength training intervention program in master swimmers should be considered once the correlation between swimming performance and dry-land strength variables is evident.
Performance in swimming competition depends on a complex interaction of many factors. For young swimmers, growing as an athlete involves this understanding and the importance of synergies between ...training and competition. Pacing strategies and chronometric variables, such as turning time, can determine a competition outcome. Therefore, looking for the finest technique and the optimal pacing strategy for the 1500/800m races are important goals to achieve for young swimmers. The aim of this study was to analyze and characterize turns time and splits time each 50m, during the 1500/800m freestyle (male/female young swimmers) during an official competition (25m pool). Both split and turning times of the 1500m and the 800m were similar, showing boys and girls with good regularity during long races. Both male and female swimmers showed low coefficient of variation in the pacing times and in the turning times.
At front crawl, the upper-limbs are responsible for nearly 90% of the forward propulsion. Therefore, the assessment of the upper-limb propulsive force is of major importance. Usually, this is ...assessed based in tethered swimming. However, it might be claimed that tethered swimming may infer constrictions while simulating the swim technique. Hence, the aim of this study was to assess the upper-limb propulsive force at front crawl based in a sensor system, allowing to measure it while swimming (i.e., with displacement). Five collegiate swimmers (3 males and 2 females) were recruited. Swimmers performed a 25m bout at maximal front crawl. The mean propulsive force and the peak force of each stroke (dominant and non-dominant limb) were analyzed during three consecutive stroke cycles, during the intermediate 15m were analyzed. For both males and females, a substantial difference with a large effect size, was observed between the upper-limbs (dominant versus non-dominant) for the mean and peak propulsive force.
Simple and easy to apply strategies to evaluate swimmers are a constant demand by coaches. The aim of the present study was to evaluate the possible conception of a swimming test that allows coaches ...to easily monitor swimmers' inefficiency. Without restrictions swimmers were able to swim faster and exert higher forces than using only their arm stroke or leg kicking. The sum of arm stroke and leg kicking mean velocities and forces was higher than the whole-body mean force for all subjects. Relative contributions of arm stroke and leg kicking were higher when estimated from velocities (94.2% vs. 62%) than force (70.3% vs. 29.7%). The proposed test (3x25-m), using only a stopwatch may be a useful tool to infer about a swimmer inefficiency, as the required strength that the swimmer must apply with the upper limbs and lower limbs may be of great relevance to the training prescription. It can be a useful procedure to identify lack of strength and/or coordination.
Just keep swimming Venkatraman, Vijaysree
Science (American Association for the Advancement of Science),
07/2024, Letnik:
385, Številka:
6704
Journal Article
The purpose of this study is to analyze the life satisfaction of swimmers at the age group of 13-14 in Eastern and Southeastern Anatolia Region. General screening model, which is one of the ...descriptive methods, was used in the research. Research contains a total of 131 swimmers composed of 50 females and 81 males at the age group of 13-14 competing in semi-final of 2017-2018 Anatolian Stars League Eastern and Southeastern Anatolia Region held in Van province. As the data collection tool, “Life Satisfaction Scale” developed by Diener, Emmons, Laresen and Griffin (9) and adopted into Turkish by Köker (25) and Yetim (34) was used in the study. The scale is a self-evaluation 5-point Likert-type scale ranging from 1 (absolutely inappropriate) to 7 (absolutely appropriate). The value of .95 was found as Cronbach Alpha coefficient belonging to the life satisfaction scale of the participant swimmers. In the evaluation of the data of the study, frequency, percentage, mean and standard deviation among the descriptive statistical methods were used and t test was applied for pairwise groups and post-hoc scheffe test was applied after Anova test for multiple groups. It has been determined that “Life Satisfaction Scale” of swimmers participating in our study display statistically significant differences by the variables of sex, age, the grade studied and monthly income (p lt;.05). It has been concluded following the research that the variables of sex, age, grade studied and monthly income are important variables affecting the life satisfaction of swimmers the age group of 13-14.
Swimming, wich is also known for a life saving function, has many important effects justifying that every child should be able to learn the basics of this sport in a school setting. In our country ...the „Every СЫЫ should leam to swim!" program promoted by the everyday PE and the World Aquatics Championship, introduced in 2013, is providing broader opportunities for having swimming instruction in a school setting. The goal of our work is to show the application and efficiency in a school setting by comparing two swimming instruction methods - all in conjuction with the optimal timeframe that can be spent on teaching. We tested the swimming skills (n=474) coming from two county seats (Pécs, Kaposvár) one-by-one. I processed the resulting data with simple mathematical-statistical methods (average and percentage calculation) using Microsoft Excel® software. Based on our results the fact that the majority of students learn the basics of different swimming moves in the lessons provided by the school's time frame can be proved. However, it is not enough to reach the ability for continuous swimming, or to be recommended for water sports.
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