A recent study delves into the science, but doctors say there’s more to it.

Running extreme distances may strain more than just muscles and joints. New research suggests ultramarathons can alter red blood cells in ways that make them less flexible and more prone to breakdown, ...

Extreme endurance running damages red blood cells in ways that may affect their ability to function properly, according to a study published in the American Society of Hematology's journal Blood Red ...

Red blood cells transport oxygen throughout your body, including to vital organs and tissues. They also help your body get rid of carbon dioxide. Too little or too many red blood cells may be ...

Scientists have long known that people living at high altitudes, where oxygen levels are low, have lower rates of diabetes ...

Red blood cells carry oxygen from the lungs to every other organ, and blood-forming stem cells must make about 200 billion new red blood cells each day to keep the oxygen flowing. For many years, ...

Preface -- About the authors -- About the companion website -- 1. Hematopoiesis -- 2. Normal red blood cell morphology -- 3. Variations in red blood cell morphology -- 4. Red blood cell inclusions and ...

Hematopoiesis -- Normal red blood cell morphology -- Variations in red blood cell morphology -- Red blood cell inclusions and parasites -- Normal white blood cell morphology -- Variations in white ...