After 2 years of being almost bedridden and unable to do much I am at last recovering. However, after about an hour of activity/chores I find I'm experiencing shortness of breath, weakness, dizziness and palpitations. I need to rest to allow these to subside. I'm pacing myself to an equal amount of activity followed by rest otherwise I'm totally wiped out and exhausted.
I'm wondering whether it is simply a need to improve my strength and stamina or do people need increased medication as they become more active?