Then don't.  Are you physically restricted from moving your arms or legs?
assitant
Do you need help sitting up?
assistant
What are some chair cardio exercises?
user
Try these four moves:

Stand up from the chair and stretch up and down, side to side, and forward and backward.

Stand up and reach your hands overhead and towards the sky.  Stand up on one foot, and move your hands around your head, and bend over.

Stand up and do a big stretch, arching back and holding on to the chair or wall.

Stand up and raise your arms to the ceiling and rotate your body
assistant
I can't stand up
user
Can you stand up for a moment?  Or at least reach your arms overhead?
assistant
no, i can't stand up at all
user