Navegando por Assunto "Eletromiografia"

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Acesso aberto (Open Access)
Atividade bioelétrica dos músculos do assoalho pélvico durante o uso de educador vaginal inovador: estudo transversal
(Universidade Federal do Pará, 2022-11-08) DUARTE, Natália de Souza; MELO NETO, João Simão de; http://lattes.cnpq.br/1547661999153615; https://orcid.org/0000-0002-4681-8532
The pelvic floor needs an integral anatomical structure due to its multiple functions. Therefore, innovative equipment is needed to improve this structure. The aim of this study was to analyze the effects of using the innovative iGeni vaginal trainer on the bioelectrical activity of the pelvic floor muscles, in addition to analyzing the different hip positions and interference factors such as age group, childbirth, sexual activity, urinary incontinence and menopause. For this, a cross-sectional study was designed, composed of 30 women, who were evaluated using the following instruments: evaluation form, International Consultation On Incontinence Questionnaire - Short Form and surface electromyography. The collected findings were: RMS of the 5-second period of contraction, peak RMS values, area values, %MVC (RMS normalized by peak signal) and median frequency. These findings were compared without and with the use of iGeni, in anteversion, neutral and retroversion pelvic positions. The results showed that the use of iGeni increased the electromyographic activity of the pelvic floor muscles in the neutral position. Women in conditions of greater tendency to dysfunction of this musculature also benefited, increasing bioelectrical activity under specific conditions. It was then concluded that this innovative biofeedback equipment was effective in the greater recruitment of muscle fibers and that it has greater effectiveness in the neutral position of the hip, being able to be an effective ally in the training of this musculature.
Acesso aberto (Open Access)
Atividade eletromiográfica durante exercícios de propriocepção de tornozelo em apoio unipodal
(2010-12) CALLEGARI, Bianca; RESENDE, Marília Maniglia de; RAMOS, Luiz Armando Vidal; BOTELHO, Lana Pereira; ALBUQUERQUE, Syme Alcolumbre de
Proprioception refers to the ability of mechanoreceptors to discriminate body position and joint movements, as well as tensions during static or dynamic phases. The aim of this study was to assess, by means of surface electromyography, activation patterns of the gastrocnemius and tibialis anterior muscles in proprioception exercises, also comparing difficulty levels. Fifty-four sedentary, right-handed, 20-to-35 year-old male volunteers performed single-leg stance exercises on the balance board, wobble board, elastic trampoline and on the floor, at the rate of three 15-second repetitions each, with a 15-second interval between repetitions. After the exercises, volunteers pointed out the highest difficulty felt. Electrical activity of both muscles was significantly higher during the test on the balance board. On the floor, both muscles showed less activity, but only for gastrocnemius muscle this difference was significant. No differences were found in muscle activation during exercises on the wobble board and the elastic trampoline. Inter-muscle analysis showed greater activity of the tibialis anterior muscle, except on the balance board. This study suggests that, when planning one-leg stance exercise for proprioceptive training, the balance board is the equipment that most requires activation of gastrocnemius and tibialis anterior muscles, being also the most difficult one.
Acesso aberto (Open Access)
Influência da facilitação neuromuscular proprioceptiva na alteração da fibra do músculo rectus femoris vista através da eletromiografia de superfície e dinamometria analógica
(Universidade Federal do Pará, 2013-09-23) PIN, Alessandro dos Santos; SILVA FILHO, Manoel da; http://lattes.cnpq.br/2032152778116209
The PNF - Proprioceptive Neuromuscular Facilitation - is a technique that is increasingly being used in muscle training of healthy people and athletes. Studies have shown that resistance exercise, including PNF, are able to convert the trained muscle fiber type. This research aimed to verify the effectiveness of PNF in increased muscle strength and check for non-invasive methods would be indicative of conversion of muscle fiber type after training. A sample group of 22 young, female university students aged between 18 and 25 years, physically active, was divided into a control group (CG n = 10) and experimental group (EG n = 12). It was collected first the Maximum Volunteer Contraction MVC of Quadriceps muscle for analogic dynamometry and root mean square - RMS by surface electromyography (EMG) of all subjects. After the first data collecting GE conducted FNP based training in the dominant lower limb to 15 sessions in 5 weeks. Before the training sessions, new MVC and RMS data were collected of all samples. Regarding muscular strength, there was an increase in both groups, significant in CG (p< 0.01) and GE (p <0.05) for RMS and MVC time, there wasn´t significant increase in GE, but the interaction Vxt was significantly increased for this group. The results corroborate the literature by showing that muscles with a predominance of resistant fibers (fiber I / IIA) have greater contraction time with more electrical activation and that the FNP is able to type IIB fibers II A. In conclusion the training sample was efficient to increase muscle strength and EMG data presented show strong evidence of the conversion of muscle fibers trained.