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Publications (21)
The range of motion (ROM) may affect the external maximal load during back squat (BS) exercise. The correct ROM manipulation can be useful as an exercise load manipulation strategy, changing the volume load during a resistance training session. The aim of this study was to evaluate the acute effects of ROM on relative load, absolute load and the ra...
Objective: to compare the myoelectric activity of the pectoralis major (PM) and anterior deltoid (AD) during the pec deck exercise, in maximal isometric voluntary contraction (MIVC) in internal rotation (IR) and external (ER) rotation of the shoulder in different joint positions. Methods: ten healthy male (age: 30 ± 6.37 years, total body mass: 84....
Revista Brasileira de Pesquisa em Ciências da Saúde.
Objective: to compare the myoelectric activity of the pectoralis major (PM) and anterior deltoid (AD) during the pec deck exercise, in maximal isometric voluntary contraction (MIVC) in internal rotation (IR) and external (ER) rotation of the shoulder in different joint positions. Methods: ten he...
RESUMO: O alongamento estático (AE) reduz o desempenho de atividades máximas de força e potência tais como saltos, arremessos e levantamentos. Entretanto, seus efeitos em repetições submáximas levadas até a falha concêntrica em exercícios isolados para o peitoral maior e deltoide anterior são pouco conhecidos. Portanto, o objetivo do presente estud...
A execução de protocolos de alongamento estático reduz o desempenho de atividades máximas dependentes de força e potência tais como saltos, arremessos e levantamentos (ex. 1RM). Entretanto, seu efeito em repetições submáximas levadas até a falha concêntrica de grupos musculares sinérgicos é pouco conhecido. Portanto o objetivo do presente estudo fo...
Strength training is commonly performed at two different knee flexion amplitudes: partial (to 90 degrees) or total (to 140 degrees). During these amplitudes, both the pelvis and the tibia are moved to ensure control of the center of gravity and displacement of the external overload. Forward or backward movement of the pelvic tilt may indirectly inf...
OBJECTIVE:
To investigate muscle activation of the shoulder extensors and trunk stabilizers by surface electromyography (sEMG) activity during the isometric Ab Wheel Rollout exercise in different shoulder joint positions.
METHOD:
We recruited 8 young, healthy, resistance trained men (age: 25 ± 3 years, height: 178 ± 5 cm, and total body mass: 81 ±...
The initial stages of diamond formation on firstly thinned Si(111) samples have been studied in a hot filament CVD (HFCVD) reactor by means of bright-field imaging and nanodiffraction experiments. Diamond crystals not resolved in high-resolution imaging are detectable using nanodiffraction. Nucleation mechanisms taking place during an HFCVD growth...
Diamond nanocrystals have been detected on nanodiffraction patterns while they remain weak on High Resolution images. Simulations of HRTEM pictures have been performed using variable thicknesses of diamond and cubic silicon carbide layers within the range 0-24 nm. These simulations explain that nanodiffraction was the only way to detect diamond. Ho...
The early stages of diamond nucleation on Si(111) thinned areas have been studied by several TEM techniques. Both top-view and cross-section investigations have been carried out to better characterise the nature of the diamond precursor as well as the diamond/silicon interface. Two different routes for diamond nucleation have been underlined using...
The mechanisms involved in the early stages of bias enhanced nucleation (BEN) of diamond have been investigated on thinned Si (111) areas using several TEM techniques (high resolution, selected area diffraction and nanodiffraction). A comparison with a hot filament chemical vapour deposition synthesis (HFCVD) performed without BEN emphasizes the he...
HRTEM study of the initial stages of diamond nucleation on Si(111)
In this paper, we show that silicon dimples are suitable samples to study diamond nucleation on a controlled distribution of defects by SEM FEG and HRTEM observations. Indeed, multi-vicinal surfaces generated by a UHV thermal treatment have been characterised by STM experiments. On these terraces, we observed a strong increase of the nucleation den...
Behaviour of textured Ir layers under HFCVD diamond environment studied by electron spectroscopies (AES, XPS)
In this study thin Si(111) sample was prepared for top view observations by high resolution transmission electron microscopy (HRTEM). The very first steps of diamond nucleation on Si(111) by a HFCVD process are studied. We detect the polycrystalline growth of silicon carbide grains with a general pseudoepitaxic orientation SiC{220}//Si{220}. They a...
Croissance de Beta-SiC sur Si(111) lors de la synthèse de diamant HFCVD. Etude HRTEM
The growth of heteroepitaxied films is a great challenge for diamond microelectronics applications and iridium is one of the better substrates to achieve it. In the present study, the early stages of diamond growth on iridium have been studied by electron spectroscopy [Auger electron spectroscopy (AES), X-ray photoemission spectroscopy (XPS)]. A gr...
