Execution:
- Patient is in standing next to the wall or bench to hold on to for balance
- The patient is asked to stand on the toes of one leg and to hold this position briefly
Positive Outcome: Decreased strength rated with the MRC scale compared to the other side
| Study | Reliability | Sn | Sp | LR+ | LR- |
| Iversen et al. (2013) | NA | 44 | 63 | 1.2 | 0.88 |
| Hancock et al. (2011): L5/S1 Disc Herniation | NA | 30 | 63 | 0.81 | 1.11 |
| Comment: Calf weakness does not seem to be able to identify a specific level of lumbar disc herniation | |||||
