Changes in surface EMG parameters during static and dynamic fatiguing contractions

Masuda, Kouji; Masuda, Tadashi; Sadoyama, Tsugutake; Inaki, Mitsuharu; Katsuta, Shigeru

doi:10.1016/s1050-6411(98)00021-2

Cited by 296 publications

(249 citation statements)

References 20 publications

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“…A further concern might be that fatigue could have affected the frequency spectra of the EMG. 57 Fatigue is known to decrease MUAP conduction velocities, and therefore cause a decrease in the mean EMG frequency content. 58 It is unlikely that the great frequency shifts observed in this study would be activated by fatigue.…”

Section: Discussionmentioning

confidence: 99%

Lower leg muscle atrophy in ankle osteoarthritis

et al. 2006

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The aim of this study was to determine changes in the lower leg muscles associated with ankle osteoarthritis. Fifteen unilateral ankle osteoarthritis patients and fifteen age-gender-matched normal subjects were assessed with clinical [osteoarthritis latency time, pain, alignment, AOFAS ankle score, ankle range of motion (ROM), calf circumference], radiological (ankle osteoarthritis grading), and muscular-physiological parameters [isometric maximal voluntary ankle torque, surface electromyography of the anterior tibial (AT), medial gastrocnemius (MG), soleus (SO), and peroneus longus (PL) muscle]. The osteoarthritis patients had increased pain (6.8 points) and reduced AOFAS score (33.7 points) compared to the control group. Compared to the contralateral healthy leg, the arthritic leg showed reduced mean dorsi-/plantar flexion ROM (16.08), reduced mean calf circumference (2.1 cm), smaller mean dorsiflexion (16.4 Nm) and plantar flexion (15.8 Nm) torques, lower mean electromyography frequency for all muscles (AT À22.6 Hz; MG À27.3 Hz; SO À25.9 Hz; PL À28.5 Hz), and lower mean electromyography intensity in the AT [À28.0 Â 10 3 (mv) 2 ], MG [À13.3 Â 10 3 (mv) 2 ], and PL [À12.8 Â 10 3 (mv) 2 ]. SO mean electromyography intensity was not significantly changed [þ2.0 Â 10 3 (mv) 2 ]. Unilateral ankle osteoarthritis is associated with atrophic changes of the lower leg muscles. This study supports previous observations on muscle dysfunction in knee osteoarthritis. ß

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Section: Discussionmentioning

confidence: 99%

Lower leg muscle atrophy in ankle osteoarthritis

et al. 2006

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“…Traditionally, frequency spectrum analysis has been carried out by recording the EMG signals during isometric contractions. However, Masuda et al 30) and Shin et al 31) have demonstrated that it is also possible to perform frequency spectrum analysis during isotonic contractions. Masuda et al 30) investigated the effect of contraction types on muscle fiber conduction velocity (MFCV), median frequency (MDF) and mean amplitude (AMP) of surface EMG in the vastus lateralis of 19 healthy male adults.…”

Section: Discussionmentioning

confidence: 99%

“…However, Masuda et al 30) and Shin et al 31) have demonstrated that it is also possible to perform frequency spectrum analysis during isotonic contractions. Masuda et al 30) investigated the effect of contraction types on muscle fiber conduction velocity (MFCV), median frequency (MDF) and mean amplitude (AMP) of surface EMG in the vastus lateralis of 19 healthy male adults. Their results showed that MDF decreased during both isometric and isotonic contractions 30) .…”

Section: Discussionmentioning

confidence: 99%

The Effect of Microcurrent-Inducing Shoes on Fatigue and Pain in Middle-Aged People with Plantar Fascitis

et al. 2007

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Abstract. When a muscle is used repeatedly for a long time, it often leads to muscular fatigue and muscle soreness. In middle-aged and elderly populations, muscular fatigue and pain during the performance of activities of daily living is a common problem caused by physiological changes in the musculoskeletal system due to the aging process. Microcurrent therapy has been shown to be effective at reducing pain and muscle soreness. For activities such as standing or walking, specially developed shoes (G-man, Busan, South Korea) which are capable of providing microcurrent therapy during the performance of these activities are an advantage as the treatment becomes integrated with the activity being performed. These therapeutic shoes or microcurrent induction shoes could be potentially useful for providing treatment if they were worn during normal activities. The purpose of this study, therefore, was to investigate the effect of these microcurrent induction shoes on pain and muscle fatigue in middle-aged people with plantar fascitis. Subjects were asked to wear their normal shoes and instructed to walk on a treadmill at 2 and 3 km/hr for 10 minutes each. Subjects were then asked to wear the specially designed microcurrent induction shoes for six weeks for at least 4 hours per day during ADL activities such as standing and walking. During the initial evaluation and at the end of the 6 weeks intervention, the electromyographic (EMG) activity of their right tibialis anterior and soleus muscles were recorded, together with their perceived level of foot pain using a Visual Analogue Scale (VAS). The results showed a significant reduction in their VAS scores (p<0.01), and the change in median power frequency of their tibialis anterior EMG recording (p<0.05). In conclusion, this study demonstrated that microcurrent induction shoes were effective in relieving foot pain and muscle fatigue in subjects with plantar fascitis.

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“…Studies have shown that factors such as pain and fatigue are better detected in isometric contractions 3,4 . This is because in these situations intracellular substrates would accumulate more easily, thus impairing the passage of potentials of muscular action and more rapidly yielding pain and fatigue conditions.…”

Section: Research On Fatigue In Facial and Jaw Muscles In Humansmentioning

confidence: 99%

Pesquisa da fadiga nos músculos faciais e mastigatórios: revisão de literatura

2014

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O objetivo deste estudo foi aprofundar os conhecimentos acerca da fadiga muscular dos músculos faciais e mastigatórios por meio da análise da literatura científica. A estratégia de pesquisa baseou-se nas indicações da Biblioteca Cochrane. Os artigos foram selecionados por meio da base de dados PubMed, utilizando-se o descritor "muscle fatigue" em conjunto com os seguintes descritores: "speech therapy", "facial muscles", "jaw muscles", "mastication", "chewing", "lip" e "clenching". Foram incluídos artigos dos últimos dez anos, independente de idioma. Os textos foram analisados inicialmente em seu abstract, sendo excluídos os que não se adequavam ao objetivo. Em seguida foram analisados os textos integralmente e considerou-se: objetivo, delineamento do estudo, formação dos grupos, critérios e rigor metodológico, protocolos aplicados, resultados encontrados e a existência de discussão sobre a fadiga nos músculos objetivados. Nesta última etapa, aqueles que não estavam de acordo com o propósito deste estudo também foram excluídos. Assim, foram encontrados 138 artigos, dos quais 54 foram excluídos devido à repetição mediante cruzamento dos termos e 84 foram analisados. Destes, 46 foram excluídos na etapa do abstract e 38 analisados na íntegra. Destes 38, 24 foram mantidos e 14 excluídos por não se adequarem aos critérios do estudo. Embora existam alguns trabalhos referentes à análise da fadiga, a metodologia dos mesmos é muito variada, dificultando a sua comparação e detalhamento. Enquanto alguns estudos observaram, por exemplo, maior fadiga dos músculos masseteres e orbiculares da boca, outros não encontraram os mesmos resultados, o que pode ter sofrido influência da população alvo de cada estudo.

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Changes in surface EMG parameters during static and dynamic fatiguing contractions

Cited by 296 publications

References 20 publications

Lower leg muscle atrophy in ankle osteoarthritis

Lower leg muscle atrophy in ankle osteoarthritis

The Effect of Microcurrent-Inducing Shoes on Fatigue and Pain in Middle-Aged People with Plantar Fascitis

Pesquisa da fadiga nos músculos faciais e mastigatórios: revisão de literatura

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