Table 1.
Percentages (%) of the muscle fibres in iliopsoas muscle
| Type | n | Left | Right | ||||
|---|---|---|---|---|---|---|---|
| Iliacus | Psoas major | P a | Iliacus | Psoas major | P a | ||
| I | 10 | 5.72 ± 4.30 | 6.51 ± 1.48b | 0.587 | 7.90 ± 3.36 | 7.00 ± 1.15b | 0.432 |
| IIA | 10 | 17.28 ± 9.56 | 23.10 ± 6.43 | 0.127 | 23.50 ± 10.90 | 25.45 ± 2.42 | 0.588 |
| IIB | 10 | 57.34 ± 18.40c | 48.15 ± 4.83d | 0.144 | 48.24 ± 21.95c | 47.24 ± 3.10d | 0.888 |
| IIX | 10 | 19.66 ± 8.21 | 22.23 ± 3.10 | 0.368 | 20.36 ± 9.23 | 20.31 ± 2.73 | 0.988 |
Values are mean ± SD.
a
P‐value stands for the comparison of iliacus to psoas major muscle.
b
Type I muscle fibres are present at a significantly lower percentage compared with other muscle fibre types in the left and right psoas major muscle (P < 0.001).
c
Type IIB fibres are present at a significantly higher percentage compared with other muscle fibre types in the left and right iliacus muscles (P < 0.001).
d
Type IIB muscle fibres are present at a significantly higher percentage compared with other muscle fibre types in the left and right psoas major muscle (P < 0.001).