From: Frailty assessment in older adults using upper-extremity function: index development
Parameter | Definition |
---|---|
Speed | Mean value of the elbow angular velocity range (maximum minus minimum speed) |
Flexibility | Mean value of the elbow flexion range |
Power | Mean value of the product of the angular acceleration range and the range of angular velocity |
Rise time | Mean value of the time required to reach the maximum angular velocity |
Moment | Mean value of the maximum moment on elbow within each flexion/extension; estimated from the moment of inertia of the forearm and the hand, and elbow motion |
Speed variability | Coefficient of variation (standard deviation divided by the mean) of the angular velocity range |
Speed reduction | Difference in the angular velocity range between the last and the first 5 s of elbow flexion as a percentage of the initial angular velocity range |
Flexion number | Number of flexion/extensions during 20Â s |