Figure 3. Fibre and half-sarcomere compliance at the plateau of isometric contraction.

A, isometric force development and force response to four length steps of different sizes at 200 ms intervals. Each step is followed, after 50 ms, by a step in the opposite direction. From top to bottom traces are fibre length change, hs length change and force. Fibre length 5.01 mm; CSA 0.032 mm²; 5°C. B, sections of the records at the time of the steps, superimposed and on an expanded time scale. C, T₁ relations for the fibre (•) and for the half-sarcomere (○) obtained from the records in B.