Hi @rafael80. Only being able to walk 10 steps before you are out of breath sure puts a crimp in your day! If you’ve had your heart and lungs checked by a doctor and they are ok, then the next thing to do is have some blood work done. Ask your doctor to have a complete blood count (CBC) taken to check for anemia. The CBC or better yet a CBC With Differential will check your red and white blood cells and platelets to see if they are within normal ranges. If you have a low red blood count, or your red blood cells aren’t healthy, they may not be carrying enough oxygen around your body. That will leave you breathless and tired.
Have you had any blood work done?