It is very well known that diabetes mellitus influences biochemical, morphologic, contractile and electrical effects of skeletal muscles. (Ashton et al., 1980; Grossic, 1982; Cameron et al., 1991; Pepato et al., 1996). Although all the authors were in agreement on most aspects of diabetic muscle changes, there were marked differences in some. For example, Ashton et al. (1980) reported a increased relaxation of extensor digitorum longus (EDL), while Grossic (loc. cit.) found no change.