Figure 5-1. Schematic diagram of the "sliding filament" theory.
c. Length-Tension Curve. The contraction of a striated muscle fiber produces
tension (force). The amount of this tension varies with the length of the fiber at each
moment of contraction. This tension is greatest when the fiber is at its resting length.
The tension is proportionately less when the fiber is shorter or longer than its resting
length. These variations in tension according to differences in fiber length may be
plotted. The resulting curve is called the length-tension curve of the striated muscle