Key result
Single rabbit skeletal myofibrils produced a plateau force of about 256 kN/m2 at sarcomere lengths of 2.25-2.5 microns, with a steeper force decline in the ascending limb compared to frog muscle.
The active force-sarcomere length relationship in rabbit skeletal muscle myofibrils shows a steeper force decline in the ascending limb compared to frog muscle, suggesting differences in internal sarcomere elements.
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Caution against extrapolating rabbit skeletal data to human cardiac muscle; leaves open species-specific sarcomere mechanics for further study.
Yuri et al. (1998) studied this question. Sarcomere length variation vs. Frog skeletal muscle was evaluated on Active force vs. sarcomere length relation. Single rabbit skeletal myofibrils produced a plateau force of about 256 kN/m2 at sarcomere lengths of 2.25-2.5 microns, with a steeper force decline in the ascending limb compared to frog muscle.
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