Fig. 3. Strain and stimulation pattern during the sinusoidal strain experiments. Strain was constant at L₀±10%, where L₀ is the length giving maximum isometric force. Stimulation duration was 0.4s (0.4 cycle) and was given at four different phases, -20%, -10%, 0% and +10%. Phase is the time from the start of shortening to the time of the first stimulus, expressed as a percentage of cycle duration.