Typical force and length records from an experiments at 24 and 35°C.

<p>A, fiber length and superimposed <i>tetani</i> at 24 and 35°C (dashed and continuous line, respectively). A portion of the burst of length and force oscillations at 6.5 kHz visible in A is shown at fast time base in B. Note the absence of phase shift between force and length sinusoids. These records were used to measure fiber stiffness. Length oscillation amplitude was 1.90 µm (p-p), corresponding to 0.18% <i>l</i>_<i>f</i>.