Having been diagnosed with anaemia, I underwent colonoscopy and upper endoscopy last week. Not pleasant, and the pre-op procedures are as bad if not worse. Everything inside was fine, meaning there is no internal bleeding or other issues causing loss of blood.
My course of iron tablets finished two weeks ago. My running since then has been fine, so hopefully my iron levels are back to normal, but I suppose the next few months will be telling.
I'm running from 5km To 10km, between two to six times a week at the moment. 10km today, and it was really enjoyable. My legs and body were tired after it, but my breathing was good, and my heart rate averaged 141, which classes as an aerobic workout.