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Fiber size in the arm (triceps brachii) and leg (vastus lateralis) muscles of elite cross-country skiers (n = 10).
| Type 1 | Type 2a | Type 2x | Type 2a/x | |
|---|---|---|---|---|
| Leg | 5423 ± 272 | 6811 ± 297 | 6590 ± 363 | 5840 ± 518 |
| Arm | 5356 ± 200∗¥¤ | 8105 ± 394∗ | 6125 ± 960¥ | 4576 ± 176¥ |
Fiber size (in μm2) was assessed immunohistochemically. ∗Significantly different from the corresponding value for leg muscle; ¥ significantly different from type 2a fibers; ¤significantly different from type 2x fiber.
