Analysis of various conditions in order to measure electromyography of isometric contractions in water and on air - da Silva Carvalho, R. G.; Ferreira Amorim, C.; Rossi Peracio, L. H.; Figueiredo Coelho, H.; Carleone Vieira, A.; Menzel, H.-J. K.; Antoni, L. (Journal of Electromyography and Kinesiology, 2010)