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| Subjects | Spine length pre- hyperextension (mm) | Spine length post- hyperextension (mm) | Difference(mm) |
|---|---|---|---|
| 1 | 212 | 214 | + 2 |
| 2 | 208 | 206 | - 2 |
| 3 | 228 | 231 | + 3 |
| 4 | 216 | 220 | + 4 |
| 5 | 217 | 220 | + 3 |
| 6 | 233 | 236 | + 3 |
| 7 | 206 | 208 | + 2 |
| 8 | 200 | 202 | + 2 |
| 9 | 234 | 236 | + 2 |
| 10 | 245 | 247 | + 2 |
