Percorrer por autor "Cruz, Ana M."
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- Comparação cinemática e neuromuscular de um exercício de abdominais no solo e na fitballPublication . Fernandes, Eurico; Oliveira, M.; Cruz, Ana M.; Vila-Chã, Carolina; Silva, A.J.; Rocha, João; Barbosa, Tiago M.O objectivo deste estudo foi comparar a cinemática e a actividade neuromuscular em exercícios de abdominais no solo e na Fitball. Quinze jovens mulheres participaram voluntariamente neste estudo. Cada sujeito efectuou duas vezes, três séries de dez abdominais com um intervalo mínimo de 60 segundos entre cada série. O exercício foi efectuado uma vez no solo e outra na Fitball. Os dados cinemáticos e neuromusculares foram recolhidos ao longo de todo o protocolo. Foi avaliada a actividades neuromuscular do recto femoral, do recto abdominal superior, do recto abdominal inferior e do oblíquo externo. Um electrogoniómetro foi colocado entre a sexta costela e a crista ilíaca (coluna) e outro entre a crista ilíaca e a zona trocantérica (anca) para avaliação cinemática. O período do exercício entre as condições em estudo não foi significativo. O ângulo mínimo da anca e da coluna lombar foram significativamente inferiores durante a execução do exercício no solo do que na Fitball. A actividade neuromuscular foi significativamente superior quando o exercício foi realizado na Fitball do que no solo em todos os grupos musculares. Como conclusão, actividade neuromuscular é superior aquando da exercitação na Fitball do que no solo.
- Comparação electromiográfica do passe e do remate em FutsalPublication . Cruz, Ana M.; Pereira, Daniela; Rocha, João; Barbosa, Tiago M.Foi objectivo deste trabalho comparar a actividade neuromuscular do membro inferior na execução do remate e do passe com o dorso do pé no Futsal. Estudaram-se 5 sujeitos do sexo masculino e federados com idades compreendidas entre os 20 e os 26 anos. Foram analisadas duas condições de execução: o passe e o remate. O passe foi efectuado para um jogador colocado à sua frente e a seis metros de distância. O remate foi efectuado a uma distância de seis metros com oposição de um guarda-redes. Os dados electromiográficos foram recolhidos através de eléctrodos bipolares pré-amplificados colocados no Vasto interno, Vasto externo, Gastrocnémio medial e Tibial anterior com uma frequência de aquisição de 1 kHz. O sinal foi processado digitalmente, a fim de se obter o valor quadrático médio (RMS). A RMS foi normalizada individualmente com base no valor máximo dentro de uma determinada condição de exercitação. Um electrogoniómetro foi colocado entre a perna e a coxa para determinação dos parâmetros cinemáticos. A frequência de aquisição foi de 1 kHz e os dados estavam sincronizados com o sinal electromiográfico. Foram avaliados o ângulo relativo mínimo entre a perna e a coxa, assim como, o valor máximo da velocidade angular entre a perna e coxa. A velocidade foi significativamente superior e o ângulo significativamente inferior no remate do que no passe. A actividade neuromuscular foi significativamente superior no remate do que no passe em todos os grupos musculares estudados.
- Evolution in swimming “science” researchPublication . Barbosa, Tiago M.; Pinto, Eurico; Cruz, Ana M.; Marinho, D.A.; Silva, A.J.; Reis, Victor M.; Queirós, Telma Maria GonçalvesThe aim of this study was to analyze the evolution of the swimming “science” research in the last decades. The content of all the 622 papers published in the Proceedings books of the Symposiums of Biomechanics and Medicine in Swimming from 1971 to 2006 was analyzed. It was adopted the procedures described for content analysis by Queirós and Botelho (in press). The main “scientific area” applied for the study of the aquatic activities, in all manuscripts, was considered as being the category to analyze. It was defined the following sub-categories (adapted from Clarys, 1996): (i) Biomechanics; (ii) Psychology; (iii) Sociology; (iv) Pedagogy/Teaching; (v) Biochemistry; (vi) Physiology; (vii) Thermoregulation; (viii) Hydrodynamics; (ix) Electromyography; (x) Anthropometry; (xi) Equipments/Methodologies; (xii) Clinical Medicine/Traumatology and; (xiii) Interdisciplinary assessment. Intra-assessment reliability (test and re-test) was very high. There was an increasing number of papers published within the period of time analyzed (ranging from 23 papers in 1971 to 145 manuscripts in 2006. “Biomechanics” was the area of assessment most often (ranging from 27.3% in 1988 to 60% in 1979) with 37.7% of the papers, followed by the “Physiology” with 17.20%. Since 2003 it is verified an increasing number of “interdisciplinary assessment” manuscripts (e.g., 9.7% in 2003 and 21.4% in 2006, shifting from the third to second area of interest) and representing 8.52% of overall papers within the period of time analyzed.
- Evolution in swimming "science" researchPublication . Barbosa, Tiago M.; Pinto, Eurico; Cruz, Ana M.; Marinho, D.A.; Silva, A.J.; Reis, Victor M.; Queirós, Telma Maria GonçalvesSwimming seems to be one of the sports more studied . More than one decade ago, Clarys (1996) made an content analysis of the research about swimming. However, in these last 13 years several developments happened in the aquatic activities.
- Evolution in swimming science research: content analysis of the "Biomechanics and Medicine in Swimming" Proceeding books from 1971 to 2006Publication . Barbosa, Tiago M.; Pinto, Eurico; Cruz, Ana M.; Marinho, D.A.; Reis, Victor M.; Silva, A.J.; Costa, M.J.; Queirós, Telma Maria GonçalvesThe aim of this study was to analyze the evolution of the swimming science research based on the content analysis of the “Biomechanics and Medicine in Swimming” Proceedings books from 1971 to 2006
- Evolution on Swimming Science Research: content analysis of the “Biomechanics and Medicine in Swimming” Proceedings Books from 1971 to 2006Publication . Barbosa, Tiago M.; Pinto, Eurico; Cruz, Ana M.; Marinho, D.A.; Silva, A.J.; Reis, Victor M.; Costa, M.J.; Queirós, Telma Maria GonçalvesSwimming seems to be one of the sports more studied . More than one decade ago, Clarys (1996) made an content analysis of the research about swimming. However, in these last 13 years several developments happened in the aquatic activities.
- Kinematical and neuromuscular assessment of the rowing exercise in the upright position with barbell to improve muscle strength and muscle endurance in group fitness classesPublication . Mejias, J. Erik; Cruz, Ana M.; Barbosa, Tiago M.The aim was to assess the interaction between kinematics and neuromuscular responses of subjects performing the rowing exercise with barbell in group fitness classes with different external loads and cadences.
- Kinematical and neuromuscular assessment of the rowing exercise in the upright position with barbell to improve muscle strength and muscle endurance in group fitness classesPublication . Mejias, J. Erik; Cruz, Ana M.; Barbosa, Tiago M.
- Kinematical and neuromuscular assessment of the rowing exercise in the upright position with barbell to improve muscle strength and muscle endurance in group fitness classesPublication . Mejias, J. Erik; Cruz, Ana M.; Barbosa, Tiago M.The aim was to assess the interaction between kinematics and neuromuscular responses of subjects performing the rowing exercise with barbell in group fitness classes with different external loads and cadences. Fifteen male subjects performed nine sets of nine repetitions of the selected exercise. Sets were composed by a pair wise combination of different external loads (5, 10 and 20 [kg]) and cadences (1, 2 and 4 musical beats) in a randomized order. Kinematical data was collected with an electrogoniometer and it was assessed the: (i) absolute duration of each exercise repetition; (ii) minimum relative angle between the arm and forearm during the flexion action. Neuromuscular data was collected with superficial electromyography and it was computed the EMG amplitude (aEMG), the EMG room mean square (RMS) and the activation time of five muscles from the arm and trunk. Increasing cadence decreased the absolute duration of the exercise cycle. There was no significant interaction between the joint angle and the external load nor the cadence. Increases in the external load and in the cadence imposed a RMS increase as well. It was also verified a significant interaction among the aEMG and the external load in the four muscle groups.
- Path-flow analysis model for anthropometric, hydrodynamic and biomechanical variables in age-group swimmersPublication . Barbosa, Tiago M.; Marinho, D.A.; Costa, M.J.; Coelho, Joel; Cruz, Ana M.; Marques, Mário C.; Moreira, Marc; Silva, A.J.The aim of this research was to develop a path-flow analysis model for age-group swimmer’s speed based on anthropomeric, hydrodynamic and biomechanical determinants.