Table 2.
Definition of gait stability parameters using IMU.
| Gait Parameter | Definition |
|---|---|
| Gait Cycle Time (s) | Time elapsed between two consecutive heel contacts of the ipsilateral foot. |
| Step Time (s) | Time elapsed from the heel contact of one foot to heel contact of the subsequent contralateral foot. |
| Single Support Time (s) | Time elapsed from the heel contact to the toe off of a single footfall. |
| Double Support Time (s) | Time elapsed from the heel contact of one foot to the toe off of the contralateral foot. It is the sum of two periods of double support in the gait cycle. |
| Swing Time (s) | Time elapsed between toe-off of a gait cycle to the subsequent heel contact of the same foot. |
| Gait Speed (cm/s) | Total distance walked divided by duration of walk. |
| Root Mean Square (RMS norm) | Statistical measure of the trunk acceleration magnitude in the AP, ML, or V direction compared to the total trunk acceleration magnitude. |
| Coefficient of Variation (CV) | Measure of variability normalized to the mean of a specific gait parameter. CV = (SD/Mean) × 100 |