Table 1.
Summary of the measurements made on EDL muscles of rats and ATB muscles of mice
| Groups | Muscle mass (mg) | Muscle length (mm) | Specific force (kN m−2) | Po before yoke attachment (mN) | Po after yoke attachment (mN) | Lateral transmission of force (mN) |
|---|---|---|---|---|---|---|
| EDL muscles of rats | ||||||
| Young (n= 12) | 147 ± 4 | 31 ± 2 | 265 ± 15 | 2995 ± 365 | 2300 ± 340 | 1830 ± 230 |
| Old (n= 5) | 135 ± 9 | 27 ± 3 | 205 ± 10 | 2230 ± 190 | 1790 ± 150 | 1350 ± 160 |
| Very old (n= 6) | 143 ± 3 | 30 ± 1 | 180 ± 5 | 1885 ± 160 | 1570 ± 190 | 1030 ± 120 |
| ATB muscles of mice | ||||||
| Control (n= 6) | 53 ± 1 | 14.2 ± 0.1 | 250 ± 15 | 1695 ± 130 | 1220 ± 150 | 1050 ± 100 |
| mdx (n= 6) | 83 ± 1 | 14.2 ± 0.7 | 200 ± 10 | 2140 ± 70 | 1470 ± 85 | 815 ± 70 |
Values are means ± 1 s.d.Po is the maximum isometric tetanic force, and specific force is the Po normalized for the total cross-sectional area of the muscle.