Fig. 2. Mean power output of eel fast muscle versus cycle frequency under approximated in vivo stimulus conditions and a strain of ±5%. Values are means ± S.E.M. (N=6). Filled symbols represent data from muscle at 0.45BL, and open symbols represent data from muscle at 0.75BL. Squares represent data obtained using approximated terrestrial stimulus parameters, and circles represent data obtained using approximated aquatic stimulus parameters. Stimulus parameters were obtained from Gillis (Gillis, 2000). BL, total body length.