Universidade São Judas Tadeu

About: Universidade São Judas Tadeu is a education organization based out in São Paulo, Brazil. It is known for research contribution in the topics: Aerobic exercise & Baroreflex. The organization has 736 authors who have published 852 publications receiving 4782 citations.

Acute effects of maximal isometric muscle action of the elbow extensors on contralateral dynamic task of the elbow flexors: a pilot study

Abstract: Aim: the aim was to investigate the influence of a maximal isometric muscle action of the elbow extensors on the contralateral dynamic task of the elbow flexors. Methods: Seventeen recreationally trained men (23.3 ± 4.9 yrs, BMI: 24.8 ± 2.2 Kg/m2) underwent two randomized different testing sessions separated by one week. In the control session (CON) all subjects performed a maximum number of repetitions test (RMs) at 75%1RM using the right elbow flexors. The experimental session (EXP) was similar to the CON; however, all subjects were instructed to perform RMs at 75%1RM by using the right elbow flexors and maintaining the maximal voluntary contraction of the left elbow extensors during the test. RMs, rating of perceived exertion (RPE), and training volume (TV) were measured and compared between sessions. Results: The EXP showed a significant 10.4% increase on the RMs (13.8 vs. 12.5, p < 0.001, d = 0.44) and 12.1% increase in TV (238.0 vs. 212.4 kg, p < 0.001, d = 0.43) than CON. No differences were observed for RPE between sessions. Conclusion: The maximum voluntary contraction of the left elbow extensors increased the RMs of the contralateral elbow flexors, reflecting a higher TV, and no differences in the RPE. Our results suggest that the investigated method may be a viable and practical alternative to increase the acute strength performance of elbow flexors when using submaximal loads.

Muscle gene expression of CGRP-α, CGRP receptor, nAchR-β, and GDNF in response to different endurance training protocols of Wistar rats

Abstract: The neuromuscular junction underwent adaptations to meet the demands of muscles following increased muscle activity. This study aimed to investigate the effects of high-intensity interval training (HIIT), endurance training (END), and mixed interval training (MIX) on the gene expression of the calcitonin gene-related peptide-α (CGRP-α), CGRP receptor, nicotinic acetylcholine receptors (nAchR)-β and glial-derived neurotrophic factor (GDNF) among different muscle types. Male Wistar rats were randomly divided into four groups: Control (n = 8), END (n = 8), HIIT (n = 8), and MIX (n = 8). The animals run each training protocol for 8 weeks (five sessions/week). Forty-eight hours after the last training session, the muscles gastrocnemius and soleus were excised under the sterilized situation. After collection, the material was prepared for RNA extraction, Reverse Transcriptase reaction, and qPCR assay. The HIIT training up-regulated the CGRP-α (p < 0.01), CGRP-Rec (p < 0.01), and GDNF (p < 0.01) in soleus as well as the nAchR-β (p < 0.01) and GDNF (p < 0.01) in gastrocnemius muscles. END training down-regulated the gene expression of CGRP-α (p < 0.01), and nAchR-β (p < 0.01) in gastrocnemius but up-regulated nAchR-β (p = 0.037) in soleus and GDNF (p < 0.01) in gastrocnemius muscles. MIX training did not show any significant up or down-regulation. The endurance performance of HIIT and MIX groups was higher than the END group (p < 0.01). All studied genes up-regulated by HIIT training in a muscle type-specific manner. It seems that the improvement of some synaptic indices induced by HIIT resulted in the improvement of endurance performance.

Velocidade de escoamento horizontal de água por um conduto

Abstract: Esta experiencia tem por objetivo o calculo da velocidade da agua que sai por um pequeno conduto horizontal, atraves das nocoes de Fisica basica do lancamento horizontal de uma particula Essa velocidade horizontal do jato d'agua e comparada com as velocidades hidrodinâmicas obtidas, respectivamente, atraves da vazao em volume e pela equacao de Bernoulli

O efeito da idade, da dupla tarefa e da visão no senso de posicionamento do tornozelo

Abstract: En este estudio se propone medir objetivamente la propiocepcion en situaciones diferentes (con y sin la ayuda de la vision, con y sin la tarea cognitiva concomitante y de forma activa o pasiva), en adultos y adultos mayores. Del estudio han participado diez adultos sanos y diez adultos mayores sanos. Se analizaron los efectos de diversas restricciones en el funcionamiento del movimiento por medio de los errores absoluto (precision) y relativo (consistencia). La medicion del sentido de posicionamiento del tobillo se llevo a cabo por medio del dinamometro isocinetico Biodex System 3. Se utilizaron el analisis de varianza de cuatro factores y la prueba posthoc de Tukey, para analizar los parametros. Los resultados demostraron que el factor sujeto interfiere en el error absoluto, ya que los grupos presentaron una diferencia significativa: los adultos mayores cometen mas errores que los adultos. Los otros factores (vision, tarea cognitiva y tipo de movimiento) no demostraron diferencias significativas. En el error relativo, los resultados desvelan que la tarea cognitiva y el movimiento fueron capaces de producir una diferencia estadisticamente significativa; sin embargo, otros factores (personas, vision y tipo de movimiento) no fueron capaces de producirla. La edad afecta a la exactitud del sentido propioceptivo, independientemente de la situacion. No hubo diferencias entre el rendimiento del movimiento con y sin la ayuda de la vision, y la doble tarea –motora relacionada con la cognitiva– impacta en la consistencia del movimiento.