Grade muscle strength on a scale of 0 to 5, as follows.
| 5/5 | Normal | Patient moves joint through full ROM and against gravity with full resistance. |
| 4/5 | Good | Patient completes ROM against gravity with moderate resistance. |
| 3/5 | Fair | Patient completes ROM against gravity only. |
| 2/5 | Poor | Patient completes ROM with gravity eliminated (passive motion). |
| 1/5 | Trace | Patient's attempt at muscle contraction is palpable but without joint movement. |
| 0/5 | None | No evidence of muscle contraction is present. |