Excercise

Hi,

Have a question for those of you who are able to exercise. I want to get into shape and be healthy again. I joined a gym. I have actually been able to use a treadmill and an elipical (which is something I thought I would never be able to do). I am fine while I am on the machine but get horribly dizzy when I get off of them. Is it normal to have dizziness after rather than while on the machine? For the people who exercise, what types of exercise are able to do with this condition?

Thanks.