Thesis (M.S.)--University of Wisconsin--Madison, 1967. / Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (M.S.)--Springfield College, 2004. / Includes bibliographical references.

Thesis (M.S.)--Ohio State University, 1986. / Includes bibliographical references (leaves 210-216). Available online via OhioLINK's ETD Center

Thesis (M.S.)--Brigham Young University. Dept. of Exercise Sciences, 2006. / Includes bibliographical references (p. 61-66).

Made available in DSpace on 2014-06-11T19:34:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-12-10Bitstream added on 2014-06-13T19:44:41Z : No. of bitstreams: 1 resende_fls_dr_guara.pdf: 899513 bytes, checksum: 3730672e093c44ee06a83fa8702f34e5 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Este trabalho objetivou estudar o efeito da Reeducação Postural Global (RPG) sobre a distribuição do peso corporal, na postura sentada, pré e pós tratamento de RPG, durante atividades de digitação e uso do mouse; e comparar a atividade eletromiográfica dos músculos trapézio superior e eretor espinhal. Participaram deste estudo 19 voluntárias, separadas aleatoriamente, em 10 para o grupo controle e 9 para o grupo RPG. O grupo RPG foi tratado em oito sessões de RPG. O grupo controle não recebeu tratamento. Uma cadeira de escritório instrumentada com células de carga na parte da frente e de trás do assento e no encosto foi usada para coletar a distribuição do peso corporal. Um sistema de aquisição de dados foi usado tanto para coletar os dados da distribuição do peso corporal, como para captar a atividade eletromiográfica. Houve diferença estatística significativa, para o grupo RPG, na parte da frente e de trás do assento, para ambas as tarefas; e para o encosto, durante o uso do mouse. Para o grupo controle, houve diferença estatística significativa para a distribuição do peso corporal na parte de trás do assento. Quanto às atividades eletromiográficas dos músculos estudados, comparadas entre os grupos, não houve diferença estatística significativa entre os valores médios do RMS. Porém, o trapézio superior direito mostrou-se mais ativo, para o grupo RPG, em ambas as tarefas; e o eretor espinhal lombar (bilateral) mostrou menor atividade eletromiográfica, nas duas tarefas estudadas, para o grupo RPG. Há a necessidade de maiores investigações sobre este tema / This work aimed to study the effect of Global Postural Reeducation (GPR) on the body weight distribution in sitting posture, before and after GPR treatment during typing activities and mouse use, and to compare the upper trapezius and erector spinae muscles electromyographic activity. The participants were 19 volunteers, randomly assigned, 10 to the control group and 9 for the GPR group. The GPR group sustained eight sessions of GPR. The control group had no treatment. An office instrumented chair with load cells on the front and back portions of the seat and backrest, was used to collect the body weight distribution. A data acquisition system was used to collect data from the body weight distribution, and to capture EMG activities. There was a statistical significant difference for the GPR group, on the front and back portions of the seat for both tasks, and on the backrest, while using the mouse. For the control group, there was a statistical significant difference on the body weight distribution on the back portion of the seat. Regarding to electromyographic activities of the studied muscles compared between both groups, there was no statistical significant difference between the mean absolute RMS values. However, the right upper trapezius showed be more active for the GPR group in both tasks studied, and the lumbar erector spinae showed lower EMG activity, in both studied tasks, for the GPR group. Further investigations about this topic are needed

Made available in DSpace on 2014-06-11T19:22:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-12-15Bitstream added on 2014-06-13T18:49:48Z : No. of bitstreams: 1 oliveira_asc_me_rcla.pdf: 1204641 bytes, checksum: 2f663ab68680a4d75547de7f0ac1f958 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O objetivo do presente estudo foi analisar o comportamento das variáveis amplitude e freqüência do sinal eletromiográfico (EMG) dos músculos bíceps do braço (BB), braquiorradial (BR), tríceps do braço (TB) e multifido (MT) em exercícios isotônicos resistidos de flexão do cotovelo, e avaliar o efeito de um treinamento de oito semanas nos valores de limiar de fadiga eletromiográfico (EMGLF), nas variáveis de amplitude e freqüência eletromiográfica, na frequência cardíaca (FC) e na percepção de esforço (PE). Participaram deste estudo 20 voluntários do gênero masculino, divididos em um grupo controle (GC) e um grupo treinamento (GT). Inicialmente, determinou-se a carga máxima isotônica (CMI) para os exercícios rosca bíceps (RB) e rosca Scott (RS). Na semana seguinte, em três dias diferentes, foram realizados os exercícios rosca bíceps, rosca bíceps adaptado (RBA) e rosca Scott, com intensidades de 25%, 30%, 35% e 40% da CMI pelo período de um minuto, um exercício por dia. A partir dos valores de coeficiente de inclinação (slope) das intensidades de carga foram calculados os valores de EMGLF. Antes e após a execução dos exercícios isotônicos foram realizadas contrações isométricas voluntárias máximas (CIVM) e submáximas (50% da CIVM). Durante a realização dos exercícios isotônicos foram registrados valores de FC e de PE. viii Com os valores de EMGLF do músculo BB foi realizado o treinamento do exercício RBA (8 semanas, 2 sessões semanais, 3 séries até a exaustão com 2 minutos de intervalo entre as séries). Foram analisados os valores de FC, PE, força isométrica máxima, bem como a amplitude e frequência da EMG em contrações isométricas máximas, submáximas e isotônicas. / The aim of this study was to analyze the behaviour of electromyographic (EMG) amplitude and frequency of the biceps brachii (BB), brachioradialis (BR), triceps brachii (TB) and multifidus (MT) in different isotonic resistance elbow flexion exercises, and to evaluate the 8 weeks training effect based in the EMG fatigue threshold (EMGFT) in the EMG variables, heart rate (HR), and perceived exertion (PE). 20 healthy males subjects was divided in a control group (CG, n=10) and a training group (TG, n=10). Initially, the one repetition maximum (1RM) isotonic force for biceps curl (BC) and Scott preacher curl (SC), was obtained. On the next week, in three different days, they was perform the BC, adapted biceps curl (ABC) and SC, with 25%, 30%, 35% e 40% of 1RM for one minute, one exercise per day. With the slope values of each load level, the EMGFT was calculated. Before and after the isotonic exercises, was performed isometric maximum voluntary contractions (IMVC) and submaximal (50% of IMVC). During the isotonic exercises, HR and PE was record. Once the BB EMGFT values were obtained, the TG performs training in the ABC exercise (8 weeks, 2 sessions, 3 exhaustive sets with 2 minutes rest). The HR, PE, isometric and isotonic force, as well as the EMG amplitude and frequency in maxima and submaximal isometric and isotonic contractions. Isotonic 166 contractions were analysed by slope and intercept values so linear regressions pre and post training. The results showed after 1 minute rest, there was recovery for BB muscle in EMG amplitude and frequency during the BC (except for total power). There was load level effect for all exercises, mainly for EMG amplitude (root mean square RMS) for BB and BR, with fatigue-induced immediately after the protocol.

M.Tech. / OBJECTIVE: The aim of this study was to determine the electromyographic effect of flexion distraction therapy of the lumbar spine on the Erector Spinae muscles in participants with lumbar facet dysfunction. STUDY DESIGN: Thirty participants with lumbar facet dysfunction underwent 6 flexion distraction therapy treatments on alternate days over a 2-week period (excluding weekends) to test the electromyographic effect on the Erector Spinae muscle. SETTING: University of Johannesburg Chiropractic Clinic, Johannesburg, South Africa. SUBJECTS: Thirty participants with lumbar facet dysfunction participated in this study. The participants were divided into two groups of fifteen participants each and matched according to age and gender. Group 1, the study group, received flexion distraction therapy to the restricted segments in the lumbar spine. Group 2, the control group, did not receive any flexion distraction therapy and rested during the duration of the treatment. METHODS: Lumbar Erector Spinae muscle electrical activity was tested before and after treatment one, three and six using surface electromyography (sEMG). One pair of bipolar electrodes was placed bilaterally over the Erector Spinae muscles at the level of L3. Participants were asked to lie down in a prone position with their arms next to their sides. They were then instructed to perform five maximum voluntary lower back extension exercises by lifting their chests and shoulders as high off the plinth as possible. Each contraction lasted five seconds, with a rest period of ten seconds between each contraction. The average rest and work surface electromyography readings were recorded, analysed and compared for reference. Information regarding the intensity of the pain experienced by the vii subjects was also collected at the start of treatment one, three and five using the Numerical Pain Rating Scale. RESULTS: Comparison of the results indicated a statistically significant difference between the two groups and their responses to the treatments. Subjectively, a statistically significant improvement was observed in Group 1 between the third and the sixth treatments and the first and the sixth treatments, with an overall 80% improvement in pain, thus demonstrating the medium to long term effects of flexion distraction therapy. Objectively, Group 1 demonstrated a statistically significant medium to long term improvement in the resting rate of the Erector Spinae muscles as observed between the first and sixth treatments. Statistically, the two groups responded differently over time with regards to the contraction ability of the Erector Spinae muscle. A statistically significant and immediate improvement was observed in the sixth treatment in Group 1, thus further supporting the long term effects and benefits of flexion distraction therapy. CONCLUSION: In light of these findings it can be concluded that flexion distraction therapy, as represented by Group 1, demonstrated favourable treatment results in terms of the pain experienced by the subjects, the resting rate and contraction ability of the Erector Spinae muscles. The trends observed in this study should be used and tested in future research studies of a similar nature incorporating larger sample groups.

The aim of the diploma thesis is the design and implementation of methods for detecting fatigue in electromyogram (EMG). At first is done a literature review on the topic of fatigue detection in electromyography (EMG). Measurement of fatigue-induced changes in the EMG signal is performed on ten subjects using the Biopac ©. Next is in the thesis solved the selection of the optimal methods of evaluating the fatigue-induced changes in EMG recording using statistical testing. In the final part of the thesis is discussion on the results of statistical testing, creation a user interface in Matlab © and comprehensive instructions for laboratory focused on the topic of fatigue in the EMG signal.

No description available.

Lower extremity muscle activity during balance can be affected by footwear characteristics. A dearth in literature remains regarding minimalist footwear in combination with a military-type workload on muscle activation during balance. The purpose of the study was to assess lower extremity muscular activity during balance tasks before and after a military workload, in two military footwear [standard tactical (STD), minimalist (MIN)]. Twentyour trained males (18-35 years) participated, following a repeated measures counter balanced footwear assignment. Participants performed maximal voluntary contractions (MVC) and balance assessments before and after a military treadmill workload. Muscle activity was collected on tibialis anterior, medial gastrocnemius, tibialis posterior, and peroneus-longus. A repeated measures 2x2 [2(Boot #1 x Boot #2) x 2(Pre-test x Post-test)] RM ANOVA with alpha set at 0.05. Significant differences occurred in mean, root-mean square, and peak muscle activities and in %MVC and co-contraction index, that were attributed to footwear design and physiological workload.