If a patient’s hemoglobin is 9 g/dL, what level of exercise is recommended?

• A. No exercise
• B. Light exercise
• C. Resistive exercise
• D. Moderate exercise

Answer: (B)

When hemoglobin is low, the blood’s ability to carry oxygen to working muscles is reduced, so the body's tolerance for exertion drops. Hemoglobin around 9 g/dL means tissues may not receive enough oxygen during harder activity, increasing the risk of symptoms like fatigue, dizziness, or chest discomfort. Light-intensity exercise fits this level because it promotes circulation and movement without greatly raising oxygen demand, such as slow walking or gentle cycling, with close monitoring for any warning signs. Moderate or resistance (heavier) activity would demand more oxygen delivery and cardiovascular effort than the body can safely supply at this hemoglobin level, making them inappropriate choices. In some cases, no exercise is chosen only if symptoms are present or the patient is unstable, but for a stable patient with hgb 9 g/dL, light exercise is the best balance of safety and benefit.