I appreciate the concern and good will of the replies. I'm doing all I can to treat the anemia--including iron supps recommended by docs. After several rounds of blood tests, scopes to check for internal bleeding (none found), and a bone marrow biopsy, the docs are stumped.
Although my blood has had an abundance of red cells as long as I can remember (for years I have donated blood as often as the local blood institute is allowed to collect it), several months ago my bone marrow started reducing red blood cell output. There's plenty of iron in the marrow--but the marrow is no longer using it correctly to produce red blood cells. And apparently the marrow has simultaneously began overproducing platelets, so I have thrombocytosis as well.
I'm going to see another hemotologist, with more knowledge and experience, and see if I can find get better answers to my questions about what has caused this affliction, and whether it can be cured.
Meanwhile, although my energy level is relatively low, I have continued training with weights and doing cardio work 6 or 7 days a week except when my job interferes with the schedule. I want to retain as much strength and muscle mass as possible, and keep my cardiopulmonary fitness level as high as I can. I think those factors may have helped me maintain a fairly normal life despite the anemia. (Although I've had the problem for over 6 months, nobody at my office has seemed to notice any difference with me, and I don't think they suspect I have any major health problems.)
As I mentioned in my original post, I was just wondering whether one of the members with some knowledge of biochemistry could tell me whether the reduced red blood cell level would interfere with muscle cell growth. If I can't benefit from the intensity of HST in my condition, then I might be better off if I shifted to a less intense version of weight training.
Thanks again for your replies.