Hello Shravani,
As nowadays people are getting very weak and on an average 4/10 people have bone problems.
This is because of they do not have proper calcium intake and improper diet.
The physiotherapist's are in demand nowadays and also gets a good amount after each patient.
If you are new in this field you can join any physiotherapy doctor and work under them for some time and then start you own profession as a physiotherapists.

Thera are also a lot of jobs available in this field as an assitant or practioner.
Hope this may help you..