@ginmav
Teaching Zumba and fitness classes makes me very happy, I think I’d feel worse if I stopped. After I recovered from chemo, my goal was to get back to where I was. Although I pay the price with heavy fatigue, I want to keep going. I get light headed too, but just off and on. Maybe you can try a few short walks around the yard, in small increments. Take it slow. As a fitness instructor, I know movement is vital! Not only is it important physically, but for our mental health as well!
Wishing the best for you.