If you'd like to exercise while seated in a chair...

...our personal trainer has put together a PDF for $10 with exercises organized into 10 10-minute routines you can do while seated to start building strength and mobility. She hasn't asked me to promote this--I just think she's great and that this is a good set of routines for beginners or people who are otherwise movement restricted.

She's got video links for each exercise that talk you through it.