| α | Tilt angle |
| CiMeD | Circumference measurement device |
| Cx | Cervical vertebrae x (1 ≤ x ≤ 7) |
| DOF | Degrees of freedom |
| IMU | Inertial measurement unit |
| L | Length along main movement axis |
| Lx | Lumbar vertebrae x (1 ≤ x ≤ 5) |
| MoCap | Motion capture system |
| OEP | Optoelectronic plethysmography |
| P | Examined parameter |
| p | p-value |
| R | Pearson correlation coefficient |
| RIP | Respiratory inductance plethysmograph |
| std | Standard deviation |
| Tx | Thoracic vertebrae x (1 ≤ x ≤ 12) |
| VC | Vital capacity |
| Vspiro | Volume obtained by the spirometer |
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