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Search Results: 1 - 10 of 106 matches for " Martim Bottaro "
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Treinamento isocinético de curto prazo promove aumento da for?a muscular em indivíduos jovens
Cunha, Rafael;Martorelli, Andre Santos;Carregaro, Rodrigo Luiz;Bottaro, Martim;
Motriz: Revista de Educa??o Física , 2011, DOI: 10.5016/1980-6574.2011v17n1p138
Abstract: the aim was to investigate the effects of short-term isokinetic training on muscle performance in young individuals. eleven healthy males subjects underwent to short-term training, consisting of 3 sessions (4 sets, 10 repetitions of concentric isokinetic exercise at 120o.s-1; 2-minute interval between sets). data reproducibility from two sessions was evaluated by intraclass correlation coefficient (icc) and bland and altman test. training assessments were made pre and post the 2nd and 3rd sessions (1 set, 3 repetitions of concentric knee extension at 60o.s-1, 120o.s-1 and 180o.s-1). an anova for repeated measures and tukey post-hoc test was applied to determine differences between tests. the icc ranged from 0.97 to 0.98 for all velocities. there was an increase in peak torque at 60o.s-1 (p=0,03) and 120o.s-1 (p=0,01) after 2 training sessions. two sessions of isokinetic exercise were sufficient to induce strength increases at the training velocity (120o.s-1) and the slower contraction velocity (60o.s-1) in young individuals.
Martim Bottaro,André Russo,Ricardo Jacó de Oliveira
Journal of Sports Science and Medicine , 2005,
Abstract: The purpose of this study was to compare three different intervals for a between sets rest period during a common isokinetic knee extension strength-testing protocol of twenty older Brazilian men (66.30 ± 3.92 yrs). The volunteers underwent unilateral knee extension (Biodex System 3) testing to determine their individual isokinetic peak torque at 60, 90, and 120°·s-1. The contraction speeds and the rest periods between sets (30, 60 and 90 s) were randomly performed in three different days with a minimum rest period of 48 hours. Significant differences between and within sets were analyzed using a One Way Analysis of Variance (ANOVA) with repeated measures. Although, at angular velocity of 60°·s-1 produced a higher peak torque, there were no significant differences in peak torque among any of the rest periods. Likewise, there were no significant differences between mean peak torque among all resting periods (30, 60 and 90s) at angular velocities of 90 and 120°·s-1. The results showed that during a common isokinetic strength testing protocol a between set rest period of at least 30 s is sufficient for recovery before the next test set in older men
Efeitos do intervalo de recupera??o entre as séries sobre a press?o arterial após exercícios resistidos
Veloso, Jo?o;Polito, Marcos D.;Riera, Tiago;Celes, Rodrigo;Vidal, José Carlos;Bottaro, Martim;
Arquivos Brasileiros de Cardiologia , 2010, DOI: 10.1590/S0066-782X2010005000019
Abstract: background: although studies have demonstrated the occurrence of postexercise hypotension (peh) in resistance exercises, there is still no consensus on an ideal protocol. objective: to evaluate the effects of different rest intervals (ri) between resistance exercise (re) sets on postexercise blood pressure (bp). methods: sixteen sedentary non-hypertensive young men performed three re protocols with ri of 1 (p1), 2 (2) and 3 (p3) minutes between the sets, as well as a control protocol (con), in a counterbalanced manner. the re protocols consisted of three sets of eight repetitions in six exercises. the loads used in the 1st, 2nd, and 3rd exercise sets were 80%, 70% and 60% of one repetition maximum (1rm), respectively. measurements were taken at rest (res), 15 (t15), 30 (t30), 45 (t45), 60 (t60), 75 (t75), and 90 (t90) minutes after the session. factorial analysis of variance (anova) was carried out, followed by post hoc lsd. results: no significant change was found in systolic bp after the protocols. a significant increase in diastolic bp was verified after con at timepoints t45 and t90. significant reduction in diastolic bp occurred after p1 and p3, with duration of 30 and 15 minutes, respectively. no significant differences were found in the systolic and diastolic bp responses between the protocols with different ri. conclusion: ri does not seem to influence systolic bp reduction after an re session. however, reductions in diastolic bp (p1 and p3) lasting up to 30 minutes were observed.
Espessura e qualidade musculares medidas a partir de ultrassonografia: influência de diferentes locais de mensura??o
Radaelli, Regis;Wilhelm Neto, Eurico Nestor;Marques, Martim Francisco Bottaro;Pinto, Ronei Silveira;
Revista Brasileira de Cineantropometria & Desempenho Humano , 2011, DOI: 10.5007/1980-0037.2011v13n2p87
Abstract: the aims of this study were: a) to investigate differences in muscle thickness (mt) measured by ultrasound and muscle quality (mq) at three sites in the elbow flexors and knee extensors, and b) to correlate mt with isometric force production of the elbow flexors and knee extensors. sixty-nine young male subjects participated in this study. the isometric force production values of the elbow flexors and knee extensors were obtained at 90° and 60°, respectively. mt was assessed at three sites in the elbow flexors (proximal - bb1, middle - bb2, and distal - bb3) and knee extensors (proximal - ri1, middle - ri2, and distal - ri3). differences between the three measurements of mt and mq were evaluated by one-way repeated measures anova. pearson's correlation test was used to assess the correlation between mt and isometric force. the level of significance was set at p<0.05. the results showed significant differences (p<0.001) between the three mt and mq sites in the elbow flexors (bb1, bb2, bb3) and in the knee extensors (ri1, ri2, ri3). the correlation between bb1, bb2 and bb3 and force production was r=0.57, r=0.52 and r=0.59, respectively (p<0.05). in the knee extensors, the correlation between ri1, ri2 and ri3 and force production was r=0.47, r=0.51 and r=0.53, respectively (p<0.01). there were significant differences in mq between elbow flexors (p<0.001) and knee extensors (p<0.001the present results showed that the site of measurement has a significant influence on mt and mq. furthermore, mt was positively correlated with isometric force production in the elbow flexors and knee extensors.
Effects of different methods of antagonist muscles pre-activation on knee extensors neuromuscular responses
Carregaro, Rodrigo L.;Cunha, Rafael R.;Cardoso, Jefferson R.;Pinto, Ronei S.;Bottaro, Martim;
Brazilian Journal of Physical Therapy , 2011, DOI: 10.1590/S1413-35552011005000028
Abstract: background: pre-activation of antagonistic muscles is used in different modalities of exercise and neuromuscular rehabilitation protocols, but its effectiveness is still controversial. objective: to verify the impact of two different methods of pre-activation of knee antagonist muscles in the neuromuscular performance and electromyographic activity of knee extensors. methods: fifteen healthy men (23.9±4.2 years of age, 1.78±0.08 meters and 81.4±10.7 kg) performed, on different days, two protocols of isokinetic muscle contraction with 4 sets of 10 repetitions at 60°.s-1 and 1 minute between sets: (1) reciprocal contraction (rc): reciprocal concentric exercise of agonist/antagonist muscles (knee flexion [kf] immediately followed by knee extension [ke]) and (2) superset (ss): alternated concentric exercise of agonist/antagonist muscles (kf set followed by a set of ke). a repeated measures anova with least-significant difference post-hoc test was used to detect differences between protocols. results: there were no significant differences between protocols (p>0.05) for peak torque (pt) and total work (tw). on the ss protocol there was a significant decrease in tw on the last two sets (p<0.05) while for rc the decrease occurred only in the last set. there were no significant differences of root mean square (rms) between protocols, but the activation pattern was more uniform during the rc protocol. conclusion: the results indicated that the peak torque was not influenced by the different pre-activation methods. however, the rc protocol appears to better maintain the total work training volume.
Efeitos do intervalo de recupera??o entre séries de exercícios resistidos no horm?nio do crescimento em mulheres jovens
Martins, Breno;Veloso, Jo?o;Fran?a, J?natas de Barros;Bottaro, Martim;
Revista Brasileira de Medicina do Esporte , 2008, DOI: 10.1590/S1517-86922008000300002
Abstract: purpose: the purpose of this study was to examine the acute hormonal responses of three different rest periods between sets of a traditional lower body resistance training session in young women. methods: twelve apparently healthy, trained females (26.83± 3.93 yrs) participated in the study protocol. on three separate sessions of a lower body resistance exercise protocol, subjects were randomly assigned a rest interval of either 30 (p30), 60 (p60) or 120 (p120) seconds between sets. the resistance exercise session consisted of four lower body exercises (bilateral knee extension, bilateral knee flexion, leg press, and squat) with 3 sets of 10 repetitions at 10-repetition maximum (rm) load. blood samples were drawn for determination of serum growth hormone (gh) concentrations before exercise (t0), immediately after each training session (t1), and 5 (t5), 15 (t15), and 30 (t30) minutes of recovery. statistical evaluation of the data was measured using a 3 x 5 repeated measurements analysis of variance [rest interval (30, 60, and 120 s) x time (t0, t1, t5, t15, t30)] with a least-significant difference (lsd) post-hoc procedure for all hormonal measurements. the probability level of statistical significance was set at p < 0.05 in all comparisons. results: there were no differences among protocols (p30, p60 and p120) in the serum gh concentrations at baseline (t0). however, as compared to t0, all protocols led to acute increases (p < 0.05) in serum gh concentrations after each training session. the gh concentrations between protocols were significantly higher for p30 (24.34 ng/ml) and p60 (23.07 ng/ml) as compared to p120 (17.13 ng/ml) at t1. the p30 gh concentrations were significantly higher at t5, t15, and t30 as compared to p60 and p120. conclusion: the magnitude of acute hormonal (gh) responses in previously strength-trained women seems to be greater with a 30-second rest interval between sets compared to longer rest periods (60s or 120s).
Atividade física e níveis de fadiga em pacientes portadores de cancer
Battaglini, Claudio L.;Bottaro, Martim;Campbell, Justin S.;Novaes, Jefferson;Sim?o, Roberto;
Revista Brasileira de Medicina do Esporte , 2004, DOI: 10.1590/S1517-86922004000200004
Abstract: purpose: the purpose of this study was to correlate physiological adaptations caused by physical activity and levels of fatigue in cancer patients. methods: twenty-seven cancer patients (56.67 ± 14.82 years old) who have been treated with chemotherapy, radiation or the combination of both treatments, were voluntary for this study. all patients were submitted to pre-exercise and post-exercise physical assessment. during the physical assessment a questionnaire measuring levels of fatigue was applied (piper et al. 1989). all independent variables (physiological adaptations) were standardized (z scores). according to the multiple regression linear models, all variables were analyzed simultaneously. results: the results did not show any significant (p < 0.05) relationship between reduction in fatigue and improvement in physical fitness (r2 = 0.102). the multiple linear regression analysis and the simple correlation results were not significant. conclusion: although there was no significant correlation between improvement in physical fitness and reduction of fatigue, the relationship between fatigue and physical fitness was linear and positive.
Rela??o entre variáveis da composi??o corporal e densidade mineral óssea em mulheres idosas
Chaves, Luciane Moreira;Gomes, Lucy;Oliveira, Ricardo Jacó de;Marques, Martim Bottaro;
Revista Brasileira de Medicina do Esporte , 2005, DOI: 10.1590/S1517-86922005000600009
Abstract: there are controversies in the literature as to the importance of the total body mass (tbm), lean mass (lm), and fat mass (fm) as determinant factors to the mineral bone density (mbd) in elder women. purpose: to determine the relationship of the mbd to the tbm, lm and fm in elder women. methods: it was studied ninety-seven 60-70 years old women (mean 66.41 ± 4.82 years). none of the participants was using hormones or any other medication that could affect the bone metabolism, as well as they were not smokers or alcohol consumers. the body composition and the mbd of the femoral cervix (fc) and lumbar spine (ls) were measured through dxa, a lunar dpx-iq. the relationship between tbm, lm, and fm as well as the fc and ls' mbd were performed separately using linear regression analysis. the multiple regression analysis was used to determine the tbm, lm, and fm on the fc and cl mbd. results: the tbm was strongly correlated to the fc and ls' mbd (r = 0.54, p = 0.01, and r = 0.37, p = 0.01, respectively) than the ft (r = 0.30, p = 0.01, and r = 0.19, p = 0.06, respectively) and the lm (r = 0.44, p = 0.01, and r = 0.26, p = 0.05, respectively). conclusion: the tbm and lm were the body components that kept a significant relationship to the fc and ls' mbd. the fm showed a weak correlation to the fc and ls' mbd, and it was not significant in this last site. thus, the tbm and the lm are the most significantly determinants among the body composition to the mbd in elder women.
Efeitos do treinamento de resistência na for?a muscular e níveis de fadiga em pacientes com cancer de mama
Battaglini, Claudio;Bottaro, Martim;Dennehy, Carolyn;Barfoot, Dianne;Shields, Edgar;Kirk, David;Hackney, A.C.;
Revista Brasileira de Medicina do Esporte , 2006, DOI: 10.1590/S1517-86922006000300009
Abstract: the effects of generalized exercise programs to combat cancer and cancer treatment-related side effects have been extensively reported in the literature. the purpose of this study was to examine the effects of an individualized exercise program with emphasis on resistance exercise, changes in muscular strength and fatigue in breast cancer female patients under treatment. twenty subjects were randomly divided in two groups: an experimental (57.5 ± 23.0 years) and a control (56.6 ± 16.0 years) group. a twenty-one week intervention involving pre- and post-functional assessments, prescriptive exercise, and three moments of fatigue measures was used. the experimental group exercised at a low to moderate-intensity for sixty minutes two days a week beginning after surgery. significant differences in overall muscular strength were observed between groups post-intervention (p = 0.025). fatigue was also significantly different between groups at treatment one (p = 0.001), treatment two (p = 0.005) and post-intervention (p = 0.001). the results of this study suggest that an emphasis on resistance training should be utilized to combat fatigue and to increase muscular strength in breast cancer patients undergoing treatment.
Efeitos agudos de vários métodos de treinamento de for?a no lactato sanguíneo e características de cargas em homens treinados recreacionalmente
Gentil, Paulo;Oliveira, Elke;Fontana, Keila;Molina, Guilherme;Oliveira, Ricardo Jacó de;Bottaro, Martim;
Revista Brasileira de Medicina do Esporte , 2006, DOI: 10.1590/S1517-86922006000600001
Abstract: several resistance training methods (rtm) have been developed in order to manipulate physiological stimuli and obtain better results with training. the purpose of this study is to compare the metabolic and mechanical responses among seven different rtm reported in the literature. the rtm were compared with regard to blood lactate, time under tension (tut) and total loading (tut x load) in recreationally trained young men. the rtm tested were 10rm (ten), superslow (sl), functional isometrics (fi), adapted vascular occlusion (vo), 6rm (six), forced repetitions (fr) and breakdowns (bd). all rtm produced significant increases in blood lactate, with no difference among them. the bd method elicited higher tut and total loading compared to the other rtm tested.
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