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. Author manuscript; available in PMC: 2014 Nov 1.

Published in final edited form as: Obesity (Silver Spring). 2013 May 31;21(11):2362–2371. doi: 10.1002/oby.20381

TABLE 2.

Muscle Fiber Distribution and Cross Sectional Area.

	Lean	Class I Obese	Class II&III Obese
Type I myocyte content (%)	46.6 ± 4.4	49.5 ± 2.4	44 ± 3.9
Type IIA myocyte content (%)	47.9 ± 2.9	41.9 ± 2.0	43.4 ± 2.9
Type IIX myocyte content (%)	5.5 ± 1.8^A	8.5 ± 2.9^AB	15.3 ± 3.2^B
Type I myocyte area (μm²)	3717 ± 145^A	4400 ± 302^AB	4897.5 ± 352^B
Type IIA myocyte area (μm²)	3339 ± 303^A	3399 ± 253^A	4587 ± 377^B
Type IIX myocyte area (μm²)	2421 ± 557^A	2473 ± 303^AB	3307 ± 330^B

Data are mean ± standard error. (CII&III; n=15, CI; n=7; L; n=8). BW; body weight.

^A,B,C

denote significant differences between groups (P < 0.05, ANOVA).