Dentre os fatores relacionados ao treinamento, a escolha do exercício representa um dos aspectos menos abordados na literatura especializada. Ainda que seja determinante para a implementação do treinamento, tendo em vista que se trata do vetor a partir dos quais as adaptações neuro-musculares irão ocorrer, pouco se tem estudado acerca de suas características biomecânicas. O presente estudo objetivou caracterizar as ações de músculos do membro inferior durante a execução do levantamento terra no estilo convencional (LT) e na sua variação com os joelhos estendidos (LTJE). No protocolo proposto as variáveis relativas a atividade muscular foram registradas através de sistema de aquisição EMG 1000 (Lynx Inc). Para cada um dos músculos analisados - bíceps femoral (BF), vasto lateral (VL), multifido lombar (ML), tibial anterior (TA) e gastrocnêmio medial (GM) - foram analisados parâmetros relativos ao nível de máxima ativação durante o movimento, ao padrão temporal de ativação e ao tempo de contração. Para o nível de máxima ativação durante o LT, o BF (1,001±0,247U.A), VL (1,283±0,339U.A), (1,127±0,427U.A), TA (1,040±0,188U.A), GM (1,0385±0,120U.A) apresentaram variações discretas e não significativas (p<0,05). quando comparados com o LTJE, onde o BF apresentou (0.986±0,285U.A), o VL (1,011±0,146U.A), ML (1,060±0,205U.A), TA (1,092±0,153U.A), GM (1,083±0,163U.A). Comportamento semelhante foi verificado para o tempo de contração. As ausências de diferenças significativas evidenciam que os dois movimentos não apresentam estruturas diferentes, pois o comportamento temporal, intensidade de ativação muscular e tempo de ativação são semelhantes, o que mostra efetividade na utilização destes como estratégia de implementação em programas de treinamento e de reabilitação física. / Among the factors related to the training, the exercise choice represents one of the aspects less boarded in specialized literature. Yet it is determinative for the training implementation and considering it attends the vector that from it the neuromuscular adaptations will occur, and its biomechanical characteristics have been little studied. The present study aimed at characterizing the actions of selected muscles of the inferior member during the execution of the deadlift in the conventional style (LT) and its variation with the extended knees (LTJE). In the proposed protocol the variants of EMG have been registered by the acquisition system EMG1000 (Lynx Inc). For each analized muscle – lateral hamstring (BF), lateral vastus (VL), multifidus lumbar (ML), anterior tibia (TA) and medial gastrocnemius (GM) – were analized parameters related to the maximum activation level during the movement, to activation time standard and to contraction time. For the maximum activation level during the LT, the BF (1,001±0,247U.A), VL (1,283±0,339U.A), (1,127±0,427U.A), TA (1,040±0,188U.A), GM (1,0385±0,120U.A) have been presented discrete variations without significant differences (p<0,05), when compared with the LTJE, where the BF presented (0.986±0,285U.A), the VL (1,011±0,146U.A), ML (1,060±0,205U.A), TA (1,092±0,153U.A), GM (1,083±0,163U.A). The same result was verified for the contraction time. The absence of significant differences makes evident that both movement didn’t present different structures, therefore the activation time standard, the maximum muscular activation and contraction time were equal, what it shows effectiveness in the use of these as strategy of implementation in programs of training and physical rehabilitation.

O objetivo deste estudo foi averiguar o efeito da ordem de exercícios de força na ativação muscular. Para isso, nove voluntários treinados em força participaram de 3 sessões: 1) teste de carga (8RM); 2 e 3) coleta dos dados EMG. Dois protocolos foram realizados: P1 tradicional: 1) Supino horizontal (SH); 2) Crucifixo horizontal (CH); 3) Desenvolvimento pela frente (DF); 4) Elevação lateral (EL); 5) Tríceps supino (TS); 6) Tríceps testa (TT); e P2 inversa: TT, TS, EL, DF, CH e SH. Músculos analisados: Peitoral maior esternocostal e clavicular (PME e PMC), deltóide anterior e medial (DA e DM) e tríceps braquial cabeça longa (TL). A contração voluntária isométrica máxima (CVIM) foi utilizada para a normalização. Cada sujeito realizou 3 séries de 8 repetições para cada exercício com um intervalo de 2min e calculou-se o valor RMS para cada repetição. Para a análise inferencial foi aplicado o teste de Wilcoxon. (p0,05). No exercício SH obteve-se uma diferença de 97,83 (P1) para 102,83% (P2) da CVIM para o PME, de 93,39 (P1) para 100,52% (P2), de 74,13 (P1) para 93,78% (P2) para o DA, de 31,21 (P1) para 30,21% (P2) para o DM e de 77,37 (P1) e 90,17% (P2) para o TBL. No exercício CH foram de 97,45 (P1) para 82,94% (P2) para o PME, de 76,69 (P1) para 57,34% (P2) para o PMC, de 31,39 (P1) para 48,32% (P2) para o TBL. Para DA e DM não houve diferença de ativação entre P1 e P2. No exercício DF, o DM apresentou 92,58 (P1) e 82,82% (P2) e o TBL 59,79 (P1) e 35,17% (P2), porém PME, PMC e DA não mostraram diferenças entre P1 e P2. No exercício EL encontrou-se 9,82 (P1) e 6,71% (P2) para o PME, 29,8 (P1) e 17,1% (P2) para PMC, 95,45 (P1) e 75,62% (P2) para DM e 12,15 (P1) e 8,82% (P2) para TBL. No exercício TS obteve-se 75,09 (P1) e 95,25% (P2) para o PME, 74,61 (P1) e 84,52% (P2) para DA, 24,81 (P1) e 25,74% (P2) para DM, 85,38 (P1) e 81,81% (P2) para TBL. Finalmente no exercício TT obteve-se 78,08 (P1) e 62,33% (P2) para o PME, 79,09 (P1) e 39,20% (P2) para PMC, 62,55 (P1) e 27,76% (P2) para DA e 25,7 (P1) e 17,85% (P2) para DM. De forma geral, pode-se afirmar que não existe uma ordem dos exercícios utilizados no treinamento de força que seja melhor em termos de ativação muscular para todos os grupos musculares. O que fica evidente é que existem diferenças de atividade muscular ao inverter a ordem de exercícios, porém os resultados deste estudo devem ser aplicados com cautela devido a carência de estudos sobre tal tema / The objective of this study was to investigate the effect of the order of strength exercises on muscle activation. For this, nine 9 volunteers trained in strength participated in three sessions: 1) load test (8RM), 2 and 3) EMG data collection. Two protocols were performed: P1 traditional: 1) bench press (SH); 2) horizontal fly (CH); 3) Shoulder press (DF); 4) Lateral rise (EL); 5) Triceps press (TS); 6) Triceps forehead (TT); and P2 reverse: TT, TS, EL, DF, CH and SH. Analyzed muscles: pectoralis major sternocostal and clavicular (PME and PMC), anterior and medial deltoid (AD and DM) and triceps brachii long head (TL). The maximal isometric voluntary contraction (CVIM) was used for normalization. Each subject performed 3 sets of 8 repetitions for each exercise with an interval of 2min and the RMS value was calculated for each repetition. For the inferential analysis was applied the Wilcoxon test. (p 0.05). In SH exercise was obtained differences from 97.83 (P1) to 102.83% (P2) of the CVIM for the PME, from 93.39 (P1) to 100.52% (P2) for PMC, from 74.13 (P1) to 93.78% (P2) for DA, from 31.21 (P1) to 30.21% (P2) for DM and from 77.37 (P1) to 90.17% (P2) for TBL. In CH exercise were from 97.45 (P1) to 82.94% (P2) for PME, from 76.69 (P1) to 57.34% (P2) for PMC, from 31.39 (P1) to 48.32% (P2) for TBL. For DA and DM muscles there were no differences in activation between P1 and P2. In DF exercise, DM showed 92.58 (P1) and 82.82% (P2) and TBL 59.79 (P1) and 35.17% (P2), but for PME, PMC and DA there were no differences between P1 and P2. In exercising EL was found 9.82 (P1) and 6.71% (P2) for PME, 29.8 (P1) and 17.1% (P2) for PMC, 95.45 (P1) and 75.62% (P2) for DM and 12.15 (P1) and 8.82% (P2) for TBL. In TS exercise was obtained 75.09 (P1) and 95.25% (P2) for PME, 74.61 (P1) and 84.52% (P2) for DA, 24.81 (P1) and 25.74% (P2) for DM, 85.38 (P1) and 81.81% (P2) for TBL. Finally, in the exercise TT was obtained 78.08 (P1) and 62.33% (P2) for PME, 79.09 (P1) and 39.20% (P2) for PMC 62.55 (P1) and 27.76% (P2) for DA and 25.7 (P1) and 17.85% (P2) for DM. In general, it´s possible to say that there is no better order of the exercises used in strength training in terms of muscle activation for all muscle groups. What is clear is that there are differences in muscle activity to reverse the order of exercises, but the results of this study should be applied with caution, due to lack of studies on this subject

This study investigated the use of electromyographic feedback in regulating the frequency of part-word repetitions. Two adult stutterers, one female (Subject A) and one male (Subject B) were employed. The frequency of part-word repetitions during baserate, EMG uV raising, and EMG uV lowering conditions was assessed for Subject B. As hypothesized, results indicate that there was a notable decline in the frequency of part-word repetitions during the EMG uV lowering sessions. However, contrary to the second hypothesis, (i.e. that an increase in EMG uV would correspond with an increase in part-word repetitions) there was also a decline in the frequency of part-word repetitions during the EMG raising sessions.

This master’s thesis deals with muscles physiology of eye movement and questions of surface electromyography measurement. Physiology and analysis of eye movement are described here. Furthermore the paper deals with a variety of electrooculographic measuring techniques and also with resulting evaluation of measured signal.

Title: Kinesiological analysis of tachi-waza technique in judo Objectives: The aim of this work is to measure activity of selected back muscles and oblique abdominal muscle using surface EMG. At the same time, determine the load with comparison with the maximum free contraction for musculus erector spinae with selected judo techniques tai otoshi, o goshi and uchi mata. Then perform intra- individual comparisons between different techniques and comparisons between measured probands. Methods: To determine the muscle chain in a motion cycle in techniques tai otoshi, o goshi and uchi mata by surface EMG method and kinetic analysis. Six probands with several years of experience in judo were selected to measure. The measurements were four muscles on both sides: musculus trapezius, musculus erector spinae, musculus latissimus dorsi a musculus obliquus externus abdominis. Results: There was some similarity for intra-individual comparison. Three probands between the technique tai otoshi and o goshi, two between tai otoshi and uchi mata. Can be assumed, that techniques tai otoshi is basic technique with which the probants began in their youth. In the inter-individual comparison, the results showed, that the technique is very individual. Most muscles involved 80% of the average motion cycle. Most often at the...

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This experiment examined the effects of EMG biofeedback and relaxation training as compared with biofeedback alone. The following.dependent variables were examined: manifest anxiety, perceived pain, perceived relaxation, EMG activity, and locus of control. Back pain patients were assigned to one of two treatment groups. Group 1 was treated with both EMG biofeedback and relaxation training. Group 2 was treated with biofeedback alone. It appears that both biofeedback combined with progressive relaxation and biofeedback training alone are effective in lowering muscle activity and perceived pain, and in increasing perceived relaxation. However, from the results of this study, it is impossible to conclude that one treatment method is more effective than the other. Suggestions for future research are discussed.

This study assesses the effectiveness of an innovative shoulder training and rehabilitation device, the Rotr 1. The device uses mechanically created motion to disturb the balance of muscular forces around the shoulder, thereby facilitating dynamic training of the muscles. The hypothesis is that random disturbances provided by the device would potentially in-crease shoulder muscle activation as users try to resist the device’s motion. To test the efficacy of the device, shoulder muscle activation from two groups (ten non-athletes and seven athletes), was assessed in three different shoulder positions and four different exercise conditions (aka configurations). Muscle activation of seven different shoulder muscles was recorded using electromyography (EMG). 3D motion capture was used to ensure repeatability of the positions during testing. ANOVA was done to assess the differences in muscle activation across groups, positions and exercise conditions. This device has the potential to improve performance and rehabilitation of overhead athletes, by increasing the body’s ability to effectively react and protect the shoulder.

京都大学 / 0048 / 新制・課程博士 / 博士(人間・環境学) / 甲第19793号 / 人博第764号 / 新制||人||184(附属図書館) / 27||人博||764(吉田南総合図書館) / 32829 / 京都大学大学院人間・環境学研究科共生人間学専攻 / (主査)教授 神﨑 素樹, 教授 森谷 敏夫, 教授 石原 昭彦 / 学位規則第4条第1項該当 / Doctor of Human and Environmental Studies / Kyoto University / DFAM

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