Influência do alongamento prévio no pico de torque e na taxa de força em exercício de contração isométrica

The objective of this study was to investigate the influence of previous active static stretch on the isometric peak torque (PT) and rate of force development (RFD) measured from different time intervals from the beginning of muscle contraction. Participated of this study 15 male individuals, apparently healthy, with ages between 18 and 25 years, without regular physical activity practice. The individuals were submitted in different days to the following tests: 1) Familiarization session to the isokinetic dynamometer; 2) Two maximal isometric concentric contractions for knee extensors in isokinetic dynamometer to determine PT and RFD (Control), and; 3) Two active static stretching exercises for the dominant leg extensors (10 x 30 s for each exercise, with 20 s of rest). After the stretching, the isokinetic test was repeated (Post-Stretching). The conditions 2 and 3 were performed in random order. The RFD was considered as the mean slope of the moment-time curve at time intervals of 0-30, 0-50 and 0-100ms relative to the beginning of muscle contraction. It was verified significant reduction for both maximal RFD and PT after the stretching (p < 0.05). At intervals of 0- 30ms, 0-50ms and 0-100ms, the RFD at the conditions with stretching was similar to the RFD without stretching (p > 0.05). At intervals of 0-150ms and 0-200ms, the RFD obtained at the contraction without stretching was significantly higher that that obtained at the contraction with stretching (p < 0.05). It can be concluded that the static stretching, performed with duration of 600 s diminish isometric PT, maximal RFD and RFD measured at late phase (> 100 ms) of muscle contraction.

Cor do solo na caracterização de áreas específicas de manejo para cultura do café

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Produtividade e sólidos solúveis da melancia irrigada em função de doses de nitrogênio

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Critérios para o manejo da adubação nitrogenada na cultura do feijão utilizando clorofilômetro portátil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Manejo da adubação na cultura do feijão em sistema orgânico de produção

Pós-graduação em Agronomia - FEIS

Biometria ocular ultrassonográfica e dopplerfluxometria das artérias oftálmica interna e central da retina em macaco-prego (Sapajus spp)

Pós-graduação em Biotecnologia Animal - FMVZ

Dopplerfluxometria e avaliação morfométrica do fígado, baço, rins e grandes vasos abdominais de onças pardas (Puma concolor) da região Campo Grande, Mato Grosso do Sul, Brasil

Pós-graduação em Biotecnologia Animal - FMVZ

Doses de potássio e umidades de solo para o crescimento de plantas de mogno-africano

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Análise de pedigree e estimativas de parâmetros genéticos para características reprodutivas em bovinos da raça Brahman

Pós-graduação em Ciência e Tecnologia Animal - FEIS

Preparo e caracterização de compósitos polímero/cerâmica com potencial aplicação como sensor multifuncional

Pós-graduação em Química - IQ

Desempenho do capim-açú e do capim-canarana em função da adubação com nitrogênio e potássio

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Evaluation of roof slope and exposure with different roofing materials in reduced models of animal production facilities in spring and summer

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Efeitos da fertirrigação sobre a ocorrência e danos de Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) em cana-de-açúcar

Brazil stands out as the world's largest producer of sugarcane and its productivity is closely related to the availability of water and nitrogen during its development and also to the incidence of pest insects. Among the species most harmful to the sugarcane in Brazil, Mahanarva fimbriolata stands out, which has seriously endangered the yields. In this context, the present study aimed to evaluate the effect of the nitrogen fertirrigation on the incidence and damage caused by M. fimbriolata in sugarcane. The experiment was composed of five treatments and four replications in a randomized block design (RBD). The treatments were composed of four doses of N-fertilizer and control (0, 50, 100, 150, 200 kg.ha-1) in drip irrigation system. The parameters evaluated were: number of nymphs in the roots, stalk productivity, sugar content, percentage of sugar, total recoverable sugar and the agricultural contribution margin. It was observed that the fertirrigation increases the productivity of stalks and sugar with the increase of nitrogen fertilization by irrigation. The use of 200 kg.ha-1 of N-fertilizer increased the incidence of M. fimbriolata up to the control and economic damage levels. The biggest financial yield was obtained with the dose of 150 kg.ha-1 of N-fertilizer.

Crescimento e qualidade de mudas de vinhático (Platymenia foliolosa Benth.) em resposta à adubação com potássio e enxofre

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Efeitos do tratamento térmico na obtenção da fase 2223 em amostras de BSCCO com e sem substituição

Pós-graduação em Ciência dos Materiais - FEIS