The difference between supine position and supine position: angle difference and action difference.

First, the angle difference.

1, supine is 180 degrees, that is, lying flat completely.

2, supine position does not require degrees, as long as the body is supine. People are sitting on a fitness chair, and their upper body is lying on the back of the chair at a certain angle, not lying flat.

3. All similar supine positions can be called supine positions as long as the whole body is not flat at 180 degrees. As for whether you need to bend your knees, it depends on the action requirements.

Second, the action difference

1, supine position refers to a state in which the longitudinal axis of the human body is as parallel as possible to the ground.

2. supine position refers to a state in which the human body is in supine position, chest, abdomen and face up.