Table 3. Regression exponents and coefficients of the scaling equation y=aM^b for muscle mass, normalized muscle length, normalized fiber length, and physiological cross-sectional area (PCSA) relative to body mass. Values are mean ± standard error of the mean (SEM).

Geometric scaling
Muscle	b	95 % CI of b	r2	a	b	95 % CI of b	r2	a
	Muscle mass				Normalized muscle length
C	0.85±0.03	0.79–0.91	0.96	−3.22±0.1	0.25±0.01	0.22–0.27	0.91	0.51±0.04
IC	0.68±0.02	0.64–0.72	0.97	−2.60±0.06	0.22±0.01	0.20–0.24	0.93	0.80±0.03
PC	0.76±0.03	0.71–0.82	0.95	−2.91 ±0.09	0.25±0.01	0.22–0.28	0.88	0.72±0.05
	Normalized fiber length				PCSA
C	0.29±0.01	0.26–0.32	0.91	0.19±0.05	0.55±0.04	0.47–0.63	0.84	−2.41±0.13
IC	0.22±0.02	0.19–0.26	0.85	0.59±0.05	0.42±0.02	0.39–0.46	0.95	−2.15±0.05
PC	0.27±0.02	0.23–0.31	0.83	0.48±0.06	0.46±0.02	0.42–0.50	0.94	−2.37±0.06

C coccygeus, IC iliococcygeus/Iliocaudalis, PC pubococcygeus/pubocaudalis