Fig. 3. Examples of recordings made during a realistic contraction protocol. The recordings shown are (from top to bottom): change in muscle length (Length), force output, change in muscle temperature (Temp) and cumulative work (solid line), heat (dashed line) and enthalpy (dotted line) outputs. The enthalpy output is the sum of the work and heat outputs. The muscle returned to its pre-stimulation temperature within 1 min of completion of the contractions, indicating that all recovery metabolism was complete. Muscle mass, 3.58 mg; length, 4.5 mm, cross-sectional area, 0.75 mm².

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