Research Article
Optimal Recognition of Volleyball Player’s Arm Movement Track Based on Embedded Microprocessor
Table 1
Three kinds of motion definition in joint kinematics.
| Exercise method | Definition | Performance of joints in motion |
| Scroll | Multiple points of one rotating joint surface are in contact with multiple points of another joint surface | Tyre movement on the road | Slide | A single point of one joint surface is in contact with multiple points of another joint surface | Tires slip on smooth ice | Spin | Rotation of a single point on one joint surface with a single point on another joint surface | The ball turns a little on the ground |
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