Table 1.

Variables obtained from experiments with single muscle fibers

Morphological	Physiological/mechanical	Biochemical
sarcomere length	force	myosin heavy chain expression
Depth	shortening velocity	myosin light chain expression
Length	power	regulatory proteins (i.e., tropomyosin)
cross-sectional area	force-velocity curves	structural protein (i.e., titin)
Diameter	power-velocity curves
	elasticity, stiffness
	specific force (force/size)