Fig. 3. Muscle power as a function of strain amplitude for muscles 178 and 179. Muscle power decreased with increasing strain for both muscles. The blue filled symbols and solid lines represent the data and regressions for muscle 178. The red broken lines represent the regression lines fitted to the data for muscle 179. Each line represents a different animal. Mechanical function for muscle 178 varied with the strain amplitude, while muscle 179 functioned to absorb energy at all strains. Data for muscle 179 have been previously published (Ahn and Full, 2002) and are presented for direct comparison with data for muscle 178.