Table 1.
Structural parameters for a block of muscle shown in figure 1 before and after shortening. (Lf, fascicle length; Lm, muscle length; β, pennation; t, thickness.)
| before shortening |
Lf1 (mm) |
Lm1 (mm) |
β1 (degree) |
t1 (mm) |
w1 (mm) |
|
|---|---|---|---|---|---|---|
| 60 | 56.38 | 20 | 20.52 | 20.52 | ||
| after shortening | Lf2 (mm) | Lm2 (mm) | β2 (degree) | t2 (mm) | w2 (mm) | gearing ratio |
| case A, constant pennation | 54.00 | 50.74 | 20 | 18.47 | 25.33 | 0.94 |
| case B, constant thickness | 54.73 | 50.74 | 22.02 | 20.52 | 22.80 | 1.07 |
| case C, variable pennation and thickness | 56.45 | 50.74 | 26 | 24.75 | 18.90 | 1.59 |