![]() ![]() Surface and intramuscular peak-normalised EMG amplitudes were compared for each muscle and speed across the stance phase using Statistical Parametric Mapping. Ten participants walked overground at slow, preferred, fast, and maximum walking speeds (1.01 ± 0.13, 1.43 ± 0.19, 1.84 ± 0.23, and 2.20 ± 0.38 m s –1, respectively) while surface and fine-wire EMG activities of flexor hallucis longus (FHL), soleus (SOL), medial gastrocnemius (MG) and lateral gastrocnemius (LG), and tibialis anterior (TA) muscles were recorded. Thus, we examined the agreement between surface and intramuscular EMG at a range of walking speeds. Despite its popularity, validity of surface EMG applied on shank muscles is mostly unclear. Increasing walking speed requires increased plantar flexor excitation, frequently assessed using surface electromyography (EMG). 5Department of Clinical Science, Intervention and Technology, Karolinska Institute, Stockholm, SwedenĪnkle plantar flexor muscles are active in the stance phase of walking to propel the body forward.4Department of Radiology, Capio S:t Göran’s Hospital, Stockholm, Sweden. ![]() 3Department of Neuroscience, Karolinska Institute, Stockholm, Sweden.2The Swedish School of Sport and Health Sciences (GIH), Stockholm, Sweden.1Neuromuscular Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland.Annamária Péter 1*, Eva Andersson 2,3, András Hegyi 1, Taija Finni 1, Olga Tarassova 2, Neil Cronin 1†, Helen Grundström 4 and Anton Arndt 2,5 ![]()
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