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| Progression | Contraction Intensity | Muscle Length | Contraction Mode |
|---|---|---|---|
| Level 1 | Low (<30% MVC) | Short (initial 3rd ROM) | Isolated Concentric |
| Isometric | |||
| Level 2 | Moderate (30-60% MVC) | Intermediate (middle 3rd ROM) | Isotonic |
| Level 3 | High (>60% MVC) | Long (final 3rd ROM) | Isolated Eccentric |
