This just means elevate yourself from a sitting position or from a lying down position.

这只是意味着从坐姿或躺姿提升自己。

To review, we have " get up" , which is to get up from your bed, to rise from a lying position or a sitting position.

复习一下，我们有“起床”，就是从床上起来， 从躺着的姿势或者坐着的姿势站起来。