Fig. 7. Comparison of the experimental (blue) power output (A) and efficiency (B) to the model predictions (green) for a range of cycle frequencies and increasing duty cycle. The same phase of activation was used in each condition. Model results use the optimal activation parameters for each cycle frequency, as shown in Table 1.Power is defined as the work per cycle time and is scaled up from P_oL_o/cycle time units based on the properties of the muscle reported by Curtin et al. (1996).