Table 1 Control/pre-cast soleus morphological properties in old compared to young adult rats
|  | Control leg or pre-cast | Young (n = 10) | Old (n = 11) | % Difference | One-Way ANOVA |
|---|---|---|---|---|---|
Wet weight (mg) | Control leg | 247.90 ± 18.10 | 227.67 ± 20.36 | –8.16%* | F (1, 21) = 5.739 P = 0.027 |
Serial Sarcomere Number | Control leg | 5532 ± 115 | 4904 ± 242 | –11.4%* | F (1, 21) = 55.461 P < 0.001 |
Fascicle Length (dissected) (mm) | Control leg | 12.1 ± 0.4 | 10.6 ± 0.4 | –12.4%* | F (1, 21) = 65.826 P < 0.001 |
Sarcomere Length (µm) | Control leg | 2.18 ± 0.07 | 2.17 ± 0.07 | N/A | F (1, 21) = 0.076 P = 0.786 |
Sarcomere Length Standard Deviation (µm) | Control leg | 0.12 ± 0.05 | 0.13 ± 0.03 | N/A | F (1, 21) = 0.980 P = 0.335 |
Fascicle Length (ultrasound) (mm) | Pre-cast | 12.7 ± 0.4 | 11.7 ± 1.1 | –7.9%* | F (1, 21) = 7.089 P = 0.015 |
Pennation angle (°) | Pre-cast | 7.2 ± 1.0 | 7.7 ± 0.7 | N/A | F (1, 21) = 1.799 P = 0.196 |
Muscle thickness (mm) | Pre-cast | 2.0 ± 0.1 | 1.7 ± 0.2 | –15.0%* | F (1, 21) = 9.349 P = 0.006 |
Physiological cross-sectional area (cm2) | Calculated via control leg and pre-cast values | 0.148 ± 0.012 | 0.154 ± 0.014 | N/A | F (1, 21) = 0.950 P = 0.342 |