Weights of muscles, heart and spleen of C57BL6 and SJL/J mice at 25 weeks of age.

All data are expressed as mean ± SE; 1Raw weight of the muscle expressed in milligrams (mg); 2Raw weight of muscle normalized to respective bodyweight; 3Extensor digitorum longus; 4Tibialis anterior; *p-values for student's t-test comparison of raw muscle weights between C57BL6 and SJL/J mice; #p-values for student's t-test comparison of normalized weights between C56BL6 and SJL/J mice.