Browsing by Author "Cardoso, Carla"
Now showing 1 - 9 of 9
Results Per Page
Sort Options
- Assessment of time limit at lowest speed corresponding to maximal oxygen consumption in the four competitive swimming strokesPublication . Fernandes, Ricardo J.; Cardoso, Carla; Silva, José; Vilar, Sónia; Colaço, Paulo; Barbosa, Tiago M.; Keskinen, Kari L.; Vilas-Boas, João PauloTime limit at lowest speed of maximal oxygen consumption (TLim-v O2max) was characterized in the 4 swimming strokes, and related with O2max and anaerobic threshold (AnT). 23 elite swimmers performed an incremental protocol for v O2max assessment. 48 hours later, Tlim-v O2max was assessed. O2 was directly measured BxB (K4 b2, Cosmed, Italy) and AnT was assessed individually (YSI 1500L Sport, USA). Tlim-v O2max values were 238.8±39.0, 246.1±51.9, 277.6±85.6 and 331.4±82.7 s in crawl, backstroke, butterfly, and breaststroke (no differences observed). No correlations were found between Tlim-v O2max and O2max, and AnT. However, inverse relationships were observed between Tlim-v O2max and v O2max (r=-0.63, p<0.01) and vAnT (r=-0.52, p=0.01), pointing out that the higher the velocities commonly related to aerobic proficiency, the lower the TLim- v O2max.
- Assessment of time limit at VO2max velocity in the 4 competitive swimming techniquesPublication . Fernandes, Ricardo J.; Cardoso, Carla; Silva, José; Vilar, Sónia; Colaço, Paulo; Barbosa, Tiago M.; Keskinen, Kari L.; Vilas-Boas, João PauloTime limit at the minimum velocity that elicits maximal oxygen consumption (TLim-v O2max) was studied both in flume (Billat et al., 1996) and in normal swimming conditions (Fernandes et al., 2003). While no studies have been carried out based on other swimming techniques than freestyle, the purpose of this experiment was to characterize, and compare, TLim-v O2max in the four competitive strokes, as well as to observe its relationships with two major performance determinants: O2max and anaerobic threshold (AnT).
- Bioenergetical profile of elite swimmersPublication . Barbosa, Tiago M.; Fernandes, Ricardo J.; Keskinen, Kari L.; Colaço, Paulo; Cardoso, Carla; Silva, José; Vilas-Boas, João Paulo
- Comparison of a continuous and intermittent triangular protocols for direct VO2max assessementPublication . Cardoso, Carla; Fernandes, Ricardo J.; Magalhães, Juan; Santos, Paulo; Colaço, Paulo; Soares, Susana; Carmo, Carla; Barbosa, Tiago M.; Vilas-Boas, João PauloThe purpose of this study was to compare two incremental protocols for V02max assessment and minimum swimming velocity that elicits V02max (vV02max). The sample comprised 11 Portuguese swimmers: 6 females (2 1.00± 1. 79 years, 54.83±3.71 kg, and 163.83±1.47 cm) and 5 males (25.40±2.79 years, 69.00±9.03 kg, and 175.00±9.03 cm). They performed two incremental protocols (starting at 0.9 m.s'\ with increments of 0.05 m.s,l per 200-m stage) for freestyle V02max assessment, with a 48h interval and in the same general conditions. One protocol was a continuous test and the other an intermittent one, with 30-s rest between incremental stages for [La-] assessment. Mean values of V02max, vV02max, VE, R, HR and [La-] for continuous and intermittent protocol, were respectively 52.5±9.44 m1.kg'l.min'l and 53.4±8.74 rnl.kg'l.min'l, 1.16±O.099 m.s) and 1.15±O.099 m.s-l, 95.3±26.32l.min,l and 95.8±26.60 l.min'l, 1.00±0.044 and 1.00±0.053, 183.l±9.47b.min'l and 187.5±8.44 b.min'l, 7.36±Ll313mM.rl and 8.86± 1.93hnM.r1. [La-] was the only different parameter between both protocols (p 0.05). Resnlts pointed out that both protocols were suitable for V02max and vV02max assessment in swimming.
- Evaluation of the energy expenditure in competitive swimming strokesPublication . Barbosa, Tiago M.; Fernandes, Ricardo J.; Keskinen, Kari L.; Colaço, Paulo; Cardoso, Carla; Silva, José; Vilas-Boas, João PauloThe purpose of this study was to measure and compare the total energy expenditure of the four competitive swimming strokes. Twenty-six swimmers of international level were submitted to an incremental set of 200-m swims (5 swimmers at Breaststroke, 5 swimmers at Backstroke, 4 swimmers at Butterfly and 12 swimmers at Front Crawl). The starting velocity was approximately 0.3m· s–1 less than a swimmer’s best performance and thereafter increased by 0.05m· s–1 after each swim until exhaustion. Cardio-pulmonary and gas exchange parameters were measured breath-by-breath (BxB) for each swim to analyze oxygen consumption (V˙ O2) and other energetic parameters by portable metabolic cart (K4b2, Cosmed, Rome, Italy). A respiratory snorkel and valve system with low hydrodynamic resistance was used to measure pulmonary ventilation and to collect breathing air samples. Blood samples from the ear lobe were collected before and after each swim to analyze blood lactate concentration (YSI 1500 L, Yellow Springs, Ohio, USA). Total energy expenditure (E˙ tot), was calculated for each 200-m stage.E˙ tot differed significantly between the strokes at all selected velocities. At the velocity of 1.0m· s–1 and of 1.2m· s–1 the E˙ tot was significantly higher in Breaststroke than in Backstroke, in Breaststroke than in Freestyle and in Butterfly than in Freestyle. At the velocity of 1.4m· s–1, the E˙ tot was significantly higher in Breaststroke than in Backstroke, in Backstroke than in Freestyle, in Breaststroke than in Freestyle and in Butterfly than in Freestyle. At the velocity of 1.6m· s–1, the E˙ tot was significantly higher in Breaststroke and in Butterfly than in Freestyle. As a conclusion, E˙ tot of well-trained competitive swimmers was measured over a large range of velocities utilising a new BxB technique. Freestyle was shown to be the most economic among the competitive swimming strokes, followed by the Backstroke, the Butterfly and the Breaststroke.
- Prática de ensino supervisionada em ensino do 1º e do 2º Ciclo do Ensino BásicoPublication . Cardoso, Carla; Guerreiro, Carla Alexandra do Espírito SantoO presente relatório foi realizado no âmbito da unidade curricular de Prática de Ensino Supervisionada, inserida no plano de estudos do Mestrado em Ensino do 1.º e 2.º Ciclos do Ensino Básico, ministrado na Escola Superior de Educação, do Instituto Politécnico de Bragança com o objetivo de refletir e dar a conhecer parte do trabalho desenvolvido ao longo do meu estágio. Este relatório é representativo do meu percurso ao longo do estágio, realizado nos diversos contextos do Ensino Básico e reflete as dificuldades que surgiram, as reações dos alunos no decorrer das atividades e as minhas reflexões sobre o trabalho desenvolvido. O estágio realizou-se em duas escolas da cidade de Bragança, uma do 1.º Ciclo e a outra do 2.º Ciclo, onde lecionei as quatro áreas para as quais o mestrado que frequentei me habilita: Português, História e Geografia de Portugal, Ciências da Natureza e Matemática, a um total de 90 alunos, com idades compreendidas entre os 9 e os 15 anos. Além das cinco experiências de ensino-aprendizagem (uma do 1.º Ciclo e uma por cada área do 2.ºCiclo), que irei descrever, analisar e refletir e, para complementar o meu trabalho desenvolvido ao longo do estágio, decidi debruçar-me sobre um tema transversal aos dois ciclos de ensino. Assim, a questão de investigação deste trabalho é: Serão os trabalhos de casa importantes para a aprendizagem dos alunos? Os resultados deste estudo evidenciam que os alunos costumam realizar as atividades prescritas pelos professores e consideram que os trabalhos para casa são importantes para melhorar os resultados escolares, auxiliando os discentes na aprendizagem dos conteúdos trabalhados em contexto de sala de aula e ajudam também a desenvolver neles o sentido de responsabilidade.
- Stroke rate and stroke length in a typical swimming time limit test at VO2maxPublication . Marinho, D.A.; Vilas-Boas, João Paulo; Cardoso, Carla; Barbosa, Tiago M.; Soares, Susana; Fernandes, Ricardo J.
- Tempo limite ao VO2max: de novo parâmetro para o controlo do treino e avaliação de nadadores a nova categoria de treinoPublication . Fernandes, Ricardo J.; Cardoso, Carla; Barbosa, Tiago M.; Soares, Susana; Lima, António B.; Colaço, Paulo; Vilas-Boas, João PauloA natação para bebés tem sido uma actividade aquática bastante procurada nos nossos dias. Apesar de já não ser uma actividade recente - o seu período de aparição e de desenvolvimento circunscreve-se aos anos de 1965 a 1985, parece ainda não ler acentuado bases numa verdadeira metodologia de intervenção, com objectivos concretos e claramente definidos.
- Time Limit at vV02max and V02max Slow Component in Swimming: a pilot study of University StudentsPublication . Fernandes, Ricardo J.; Billat, Véronique; Cardoso, Carla; Barbosa, Tiago M.; Soares, Susana; Ascenção, António; Colaço, Paulo; Demarle, Alexandre; Vilas-Boas, João PauloThe aim oftms study was to measure in swimming-pool conditions, the time to exhaustion at the minimum velocity that elicits maximal oxygen consumption (TLim-vV02max) and to verify the existence of an oxygen uptake slow component (02SC) in freestyle swimming. Ten university students performed a continuous incremental protocol for vV02max assessment. Forty-eight hours later, they swam to exhaustion at vV02max to assess TLim-vV02max and 02SC. V02 was directly measured and swimming velocity was controlled by a visual pacer. Blood lactate concentrations ([La-]) and heart rate (HR) values were also measured. Mean V02max for the incremental test was 54.2±8.2 m1.kg'l.min'l, and the correspondent vV02max was 1.19±O.08 m.S,l The mean duration ofthe TLim-vV02max test was 325±76.5 s. 02SC appeared in the allout swim at VV02max (279.0±195.2 ml.min'l) and it was found to significant1y correlate with the TLim-vV02max (r = .74, p< .05). These results demonstrated that 02SC is observed also in swimming-pool conditions and that TLim-vV02max values are in accordance with typical formulations of aerobic power training sets for swimmers.