If a patient’s hematocrit is less than 25%, what level of exercise is recommended?

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

Answer: (A)

Low hematocrit means there are fewer red blood cells to carry oxygen in the blood. Exercise raises the body's demand for oxygen, so when hematocrit is very low (below 25%), the body's ability to deliver enough oxygen to muscles and the heart is severely limited. This makes even light activity risky, increasing chances of dizziness, fainting, chest pain, or heart rhythm problems. Because of these safety concerns, the safest approach is to avoid exercise and rest until the hematocrit improves or a clinician clears activity. In practice, monitoring and conservative management are prioritized at this level, with activity typically deferred and only resumed under medical guidance once hematocrit rises to a safer range.