Table A2.
Features Extracted
| Feature Name | Description | Abbreviation |
|---|---|---|
| Initial Metrics | ||
| Shoulder ROM | List of angles between arm and torso | Sh_ROM |
| Elbow Angle | List of angles between axis of arm and forearm | EA |
| Wrist ROM | List of vertical distances between fingers and wrist joint | Wr |
| Pro.-Sup. | List containing classifications of “supination,” “pronation,” or “neutral” | Pro_Sup |
| First 10% | Isolates first 10% of video frames/the beginning of activity | F10 |
| Last 90% | Isolates last 90% of video frames/after the beginning of activity | L90 |
| Last 10% | Isolates last 10% of video frames/the end of activity | L10 |
| Speed | List of changes in values from another list, like speed | Spd |
| Maximum | Highest value of list | Max |
| Minimum | Lowest value of list | Min |
| Average | Average value of a list | Avg |
| Mode | Most common value in a list | Mod |
| Std. Dev. | Standard deviation of the values in a list | SDev |
| 1st Digit DIP | List of positions of the 1st digit’s distal interphalangeal joint | 1DIP |
| 3rd Digit MCP | List of positions of the 3rd digit’s metacarpophalangeal joint | 3MCP |
| 3rd Digit DIP | List of positions of the 3rd digit’s distal interphalangeal joint | 3DIP |
| 5th Digit DIP | List of positions of the 5th digit’s distal interphalangeal joint | 5DIP |
| Wrist Position | List of positions of the wrist | WrP |
| Distance between 2 joints | List of Euclidean distances between 2 joints labeled and | Dis (, ) |
| Ratio between 2 distances | A ratio of minimum distance to maximum distance between joints labeled and | R (, ) |
| Model Inputs | ||
| Max(Sh_ROM) | Highest angle between arm and torso achieved during exercise | |
| Avg(Spd(Sh_ROM)) | Average angular speed of the arm during abduction | |
| Max(Spd(Sh_ROM)) | The maximum angular speed of the arm during abduction | |
| Max(EA) | Greatest amount of elbow flexion | |
| Min(EA) | Greatest amount of elbow extension | |
| Max(F10(EA)) | Greatest angle of flexion in the first 10% of video frames | |
| Max(L90(EA)) | Greatest angle of flexion in the last 90% of video frames | |
| Avg(EA) | Average angle between arm and forearm during exercise | |
| Avg(Spd(EA)) | Average speed arm is flexed or extended during exercise | |
| Max(WrY)-Min(WrY) | The total vertical ROM of the wrist | |
| Max(WrX)-Min(WrX) | The total horizontal ROM of the wrist | |
| SDev(Wr) | Standard deviation from the mean position of the wrist | |
| Avg(Spd(Wr)) | Average speed the subject moves their wrist | |
| Mode(L10(Pro_Sup)) | At the end of an exercise, the highest frequency of hand positions classified as “supinated,” “pronated,” or “neutral” | |
| Max(Spd(5DIP)) | The maximum speed of the 5th digit | |
| Avg(Spd(5DIP)) | The average speed of the 5th digit | |
| Max(Spd(1DIP)) | The maximum speed of the thumb | |
| Avg(Spd(1DIP)) | The average speed of the thumb | |
| Min(Dis(WrP, 3DIP)) | The smallest distance between the wrist and 3rd digit | |
| Max(Dis(WrP, 3DIP)) | The greatest distance between the wrist and 3rd digit | |
| R(WrP, 3DIP) | The ratio of the smallest distance to greatest distance between the wrist and the 3rd digit | |
| Min(Dis(3MCP, 3DIP)) | The minimum distance between the 3rd digit’s metacarpophalangeal joint and the distal interphalangeal joint | |
| Max(Dis(3MCP, 3DIP)) | The maximum distance between the 3rd digit’s metacarpophalangeal joint and the distal interphalangeal joint |
Elements of the list correspond to frames in video clips. F10, L90, and L10 assess metrics based on their values at the beginning of the exercise, after the beginning of the exercise, or at the end of the exercise. Other abbreviations: ROM, range-of-motion; Pro.-Sup., pronation-supination status; Std. Dev., standard deviation.