Table 4.
Muscle Groups and Type I Fiber Contribution
| Muscle | Type I Contribution82‐84 |
|---|---|
| Rotator Cuff (Supraspinatus, Infraspinatus, Teres Minor, Subscapularis) | Type I: 44% Range 38% In Subscapularis – 54% In Supraspinatus) |
| Deltoid | Type I: 47 – 74% |
| Gluteus Maximus | Type I: 52‐60% |
| Rectus Femoris | Type I: 30 – < 50% |
| Vastus Lateralis, Medialis, Intermedius | Type I: 44 – 64% |
| Hamstrings (Semitendinosus, Semimembranosus, Biceps Femoris) | Type I: 44 – 67% |
| Gastrocnemius | Type I: 44‐65% |
| Soleus | Type I: ∼70% |
| Multifidus | Type I: ∼65% |