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. 2006 Apr 6;574(Pt 1):125–138. doi: 10.1113/jphysiol.2006.108720

Table 4. Fibre type composition and capillary density in the vastus lateralis muscle of women and men.

Women Men
Fibre type composition (number percentage)
″Type 1 67.9 ± 3.6** 54.6 ± 2.8
″Type 2A 23.3 ± 3.6 30.2 ± 2.0
″Type 2X 8.7 ± 3.0 15.2 ± 3.0
Fibre type composition (area percentage)
″Type 1 68.2 ± 3.0*** 49.2 ± 2.9
″Type 2A 24.2 ± 3.8* 35.6 ± 2.2
″Type 2X 7.6 ± 2.6 15.3 ± 3.1
Mean area per fibre (μm2)
″Type 1 4267 ± 177 4490 ± 233
″Type 2A 4407 ± 224*** 5895 ± 189
″Type 2X 4327 ± 473 5021 ± 339
Capillary density
″Capillaries per fibre 2.0 ± 0.2 2.2 ± 0.1
″Capillaries per mm2 435 ± 32* 355 ± 17

Data are mean ± s.e.m. Sex difference

*

P < 0.05

**

P < 0.01

***

P < 0.001