Table 1.
Dimensions and category systems of SsObserWork instruments: hetero-observation (H-O) and self-observation (S-O) version.
| H-O instrument Category systems | Code | Classificationa(Recommended -R- or Non- Recommended -NR-) | S-O instrumentb |
|---|---|---|---|
| Dimension 1. Feet | |||
| Symmetric feet behind the load | p1 | NR, during LF and LW phases. | ✓ |
| Asymmetric feet behind the load | p2 | NR, during LF and LW phases. | ✓ |
| Symmetric feet beside the load | p3 | R, during LF and LW phases. | ✓ |
| One foot beside the load and the other behind it | p4 | HR, during LF and LW phases. | ✓ |
| Walking | ppv | ||
| Dimension 2. Knee joints | |||
| Extension – slight flexion | rex | ✓ | |
| Moderate flexion | rmo | R, during LF and LW phases. It is just considered NR when the highest position and the upright (0 cm) position are concurring. | ✓ |
| Maximum flexion | rsq | NR, during all MMH phases. | ✓ |
| Walking | rcv | ||
| Dimension 3. Back | |||
| Neutral | tne | R, during all the MMH phases. | ✓ |
| Flexion | tF | NR, during all the MMH phases. | ✓ |
| Maximum flexion | thip | NR, during all the MMH phases. | ✓ |
| Extension | tEx | NR, during all the MMH phases. | ✓ |
| Dimension 4. Elbow joints | |||
| Extension – slight flexion | b1 | R, during all the MMH phases. | ✓ |
| Flexion | b2 | NR, during all the MMH phases. | ✓ |
| Dimension 5. Load position | |||
| Close to the body | ap | R, during all the MMH phases. | ✓ |
| Separated from the body | se | NR, during all the MMH phases. | ✓ |
| Dimension 6. Interaction between back tilt and displacement | |||
| Tilt at 0 cm | sin | R, during LF and LW phases. | |
| Tilt at > 0 cm | non | NR, during all the MMH phases. | |
| Upright at 0 cm | f13 | R, during the highest position of LF and LW phases. | |
| Upright at > 0 cm | anda | R, only during CA phase. | |
aThe classification as recommended (R) or non-recommended (NR) is defined in relation to the MMH code phases: LF-Lifting [with three subphases: initial position (f1a), lowest position (f1b), highest position (f1c)]; CA-Carrying (f2); LW-Lowering [with three subphases: highest position (f3b), lowest position (f3c), final position (f3d)]. bThe check mark (✓) indicates the presence of the category in the S-O instrument.