Fig. 7. Work loop results. Normalized contour plots of (A) mean power and (B) mean
maximal instantaneous power (MIP) for TL preparations. (C) Mean power and (D)
mean MIP for ST preparations. Insets depict the corresponding standard
deviations. Values are normalized per preparation. Asterisks show local
maxima. The dots show the data points measured in the strain vs cycle
frequency parameter space.