Sit to Stand - total duration
The duration of each Sit-to-Stand cycle, from standing up to sitting down, is automatically calculated.
Sit to Stand - sub durations
The duration of the dynamic phases (flexion and extension of the trunk) as well as those of the static phases (sitting and standing) are given.
Sit to Stand - trunk angles
The degree of flexion and extension of the trunk is calculated for standing up and sitting down.
Sit to Stand - maximum vertical velocity
Maximum velocity in vertical direction is calculated for the rising-phases and for the descending-phases.
Sit to Stand - maximum angular velocity
The maximum trunk angular velocity is calculated during each rising-phase and descending-phase.
1. Zijlstra, A., Mancini, M., Lindemann, U., Chari, L., Zijlstra, W. (2012). Sit-Stand and Stand-Sit Transitions in Older Adults and Patients with Parkinson’s Disease: Event Detection Based on Motion Sensors Versus Force Plates. Journal of NeuroEngineering and Rehabilitation, 9(75), 1-10. doi:10.1186/1743-0003-9-75
2. van Lummel, R. C., Ainsworth, E., Lindemann, U., Zijlstra, W., Chiari, L., Van Campen, P., & Hausdorff, J. M. (2013). Automated Approach for Quantifying the Repeated Sit-To-Stand Using one Body Fixed Sensor in Young and Older Adults. Gait & posture, 38(1), 153-156. doi:10.1016/j.gaitpost.2012.10.008
3. van Lummel, R. C., Ainsworth, E., Hausdorff, J. M., Lindemann, U., Beek, P. J., & Van Dieën, J. H. (2012). Validation of Seat-Off and Seat-On in Repeated Sit-To-Stand Movements Using a Single-Body-Fixed Sensor. Physiological measurement, 33(11), 1855.
4. van Lummel, R. C., Walgaard, S., Maier, A. B., Ainswort, E., Beek, P. J., van Dieën, J. H. (2016). The Instrumented Sit-to-Stand Test (iSTS) Has Greater Clinical Relevance than the Manually Recorded Sit-to-Stand Test in Older Adults. PLOSone, 11(7), 1-16. doi:10.1371/journal.pone.0157968