Master of Sports of International class in track and field athletics, winner of the Zurich marathon, participant of the Beijing 2008 Summer Olympics, multiple European Cup and Russian championships medalist, coach of the school “I Love Running”
People with low level of hemoglobin (Hg) who wants to run referred to me several times. But it's a doctor, not a coach who should decide whether or not to permit these amateur runners to do cardio training. If you underwent a medical examination, but no serious pathology was revealed and you were allowed to do physical exercises, you just should follow some rules and recommendations.
Firstly, duration and intensity of the initial training load should be minimal . Secondly, it's desirable to start with outdoor training in order to create conditions for maximum oxygen uptake. What about the question "how to increase Hg level"? - In the absence of pathology, complex preparations containing iron supplements, vitamin B12 and folic acid are more often prescribed.