I just got my blood test back today and found out I have a ferritin count of 3 and a hemoglobin count of 11.7. I am a girl high school runner and have been in a plateau for almost 2 years now-I am wondering how much you think iron deficiency anemia and a ferritin level of 3 would effect my times? I ran a 5:27 in 8th grade and have only been able to get above or near it since. I realize my ferritin level is extremely low, so I was wondering if anyone knew how drastic the effects have been.