Anemia is caused by either a decrease in the production of red blood cells (decreased erythropoiesis) or hemoglobin or an increase in loss (usually due to bleeding) or the destruction of red blood cells.
You should wear tight compression outfits to decrease the possibility of drag, especially in an olympic race. You could even wear a swim hat to lower drag from your hair.
A person with a speech-related disorder can know what to say, they just have trouble saying it. It has nothing to do with their knowledge, so they wouldn't be less intelligent just because of their disorder.
