[show abstract][hide abstract] ABSTRACT: The control of immunological alterations becomes important during in-season training, as a result of increased incidence of infectious diseases, and may assist in avoiding interruptions to training due to illness. The aim of the present study was to evaluate 28 weeks of chronic immune modulations in female volleyball athletes. The sample was composed of twelve athletes aged 19.47 ± 2.49 years, height 1.78 ± 0.08 cm, and body mass 66.77 ± 7.8 kg. Leukocytes, individual immune cell count, interleukin (IL)-2, IL-6, and tumor necrosis factor (TNF)-α plasma cytokines were measured during the competitive period. Results revealed that immune variables were correlated with symptoms of upper respiratory tract infections and training-load indicators, indicating a possible marker of immune status. There was a statistically significant increase in total leukocytes, neutrophils, and monocyte count, a decrease in lymphocytes, and an increase in upper respiratory tract infection symptoms, with no change in IL-2, IL-6, and TNF-α. Correlations between subjective levels of tiredness, total leukocyte count, and neutrophils with upper respiratory tract infection symptoms were observed. In conclusion, these correlations can represent important tools to access the immune status of an athlete during long training periods, preventing a possible immunosuppressive status.
International Journal of General Medicine 01/2011; 4:837-844.
[show abstract][hide abstract] ABSTRACT: The purpose of this study was to investigate the effect of local muscle endurance training on maximal oxygen uptake and ventilatory threshold in young women. Nineteen untrained women, ranging in age from 18 to 26 years, were included in the study and assigned to two groups: the control group (n = 10), and the resistance training group (n = 9). The following variables were obtained at baseline and after 12 weeks: body mass; maximal oxygen uptake, maximal heart rate, maximal oxygen pulse, oxygen uptake at the ventilatory threshold, heart rate at the ventilatory threshold, and oxygen pulse at the ventilatory threshold assessed by cardiopulmonary exercise testing on treadmill; 1-repetition maximum (RM) tests in bench press, latissimus pull down, military press, lying barbell extension, standing barbell curls, leg press, knee extension, and hamstring curl. The training group underwent resistance strength training. Loading during training followed the concept of maximum repetitions. Each session was defined as the performance of three sets of 15RM with a 60-second rest between sets and exercises. No significant changes were observed in the control group before and after 12 weeks (p > 0.05). All 1RM tests increased after training (p < or = 0.01) in the training group, but no significant change was observed in body mass (p > 0.05). Cardiopulmonary variables showed no significant differences before and after resistance training (p > 0.05). These findings indicate that the local muscle endurance training realized produces no improvement in cardiorespiratory capacity in young women.
The Journal of Strength and Conditioning Research 09/2009; 23(6):1637-43. · 1.80 Impact Factor
[show abstract][hide abstract] ABSTRACT: The responses of the human body submitted to several stimuli measured by performance parameters have been object of studies in order to improve training methods. The aim of this study was to investigate the effects of the neuromuscular training in the cardiorespiratory fitness and body composition of volleyball athletes. Eleven women were assessed before and after 12 weeks of training, concerning the preparatory phase of the annual training cycle. The experimental protocol consisted of assessment of the body composition (fat percentage, lean mass and body fat) and of the cardiorespiratory fitness through ergospirometry on treadmill with continuous protocol and increasing load, in which the oxygen maximal uptake, maximum heart rate, anaerobic threshold, heart rate threshold and anaerobic threshold velocity were determined. The training was carried out five times per week and was divided in two sessions: one strength training and the another technical and tactical training. After the studied period, increase (p < 0.05) in oxygen maximal uptake (6.5%), anaerobic threshold (17.5%), threshold velocity (15.3%) and lean mass (3.2%) was observed. Reduction (p< 0.05) in maximum heart rate (- 3.1%), fat percentage (-8.2%) and body fat (-7.4%) was observed. It is concluded that neuromuscular training performed in the preparatory phase contributed to increase in the cardiorespiratory fitness and lean mass as well as decrease in fat percentage and body fat of volleyball athletes.
Revista Brasileira de Medicina do Esporte 01/2009; 15(4):295-298. · 0.27 Impact Factor
[show abstract][hide abstract] ABSTRACT: A hipertensão arterial é uma doença com alta prevalência na população brasileira adulta. A adoção de exercícios físicos é recomendada como tratamento não farmacológico, entretanto há poucos estudos utilizando a hidroginástica no tratamento. O objetivo desse trabalho é avaliar os efeitos do treinamento de hidroginástica na capacidade aeróbia e nas variáveis hemodinâmicas de mulheres hipertensas. Participaram da amostra 9 mulheres, idade média de 57,1 + 9,1 anos, medicadas e com a pressão arterial controlada. O tempo de treinamento foi de 8 semanas, freqüência de 2 dias por semana e duração de 45 minutos cada sessão. Antes e após o período de treinamento, as voluntárias realizaram antropometria (peso, estatura e IMC) e avaliação da capacidade aeróbia por meio do teste submáximo indireto em esteira rolante descrito por MAHAR et al. (1985). Aferiu-se a freqüência cardíaca e a pressão arterial, antes e ao final do teste. Comparou-se as variáveis que apresentaram distribuição normal pelo teste t de Student e, para as que não apresentaram normalidade, pelo teste de Wilcoxon. Houve um aumento significante do consumo máximo de oxigênio (p