Don't know if its affordable for you but maybe a treadmill would help.

I got one so no one could see me exercise too! I also got a fitbit.

Here is a link to my article on it.

http://thebipolarmaniac.wordpress.co...r-heard-of-it/


It's helped me lose 16 lbs. just by walking! I have 80lbs. to lose mind you. If you have any questions, feel free to ask!