First time i worked out in ages, now i feel really ill, will i pass out?

Posted: 08 Feb 2014 01:17 AM PST

I am not overweight but due to illness i do not go out much resulting in me not being that fit, i worked out doing zumba for half an hour today for the first time in a month and thought i was going to pass out. It's been about an hour since I did it and my heart rate is back to normal but I just feel so ill. Shall I seek medical help or will resting help?