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. 2021 Oct 18;8:718866. doi: 10.3389/fvets.2021.718866

Table 1.

Baseline muscle fiber type composition of the m. pectoralis, the m. vastus lateralis, and the m. semitendinosus.

Muscle fiber types (%)
Muscles Type I (%) Type IIA (%) Type IIAX (%) Type IIX (%)
m. pectoralis 24.7 (21.1–37.5)* 52.8 (39.3–68.8) 6.9 (1.4–12.5) 16.6 (2.1–28.8)*
m. vastus lateralis 20.4 (3.5–30.2)* 54.9 (42.4–66.3) 8.4 (2.1–14.4) 17.5 (4.7–33.2)*
m. semitendinosus 13.6 (0.3–30.4) 46.7 (24.7–71.1) 5.4 (0.8–18.7) 34.5 (21.2–62.4)
*

Significantly different from the m. semitendinosus, p < 0.017.

Percentages of type I, type IIA, type IIAX, and type IIX are given as median (minimum–maximum).