Hematocrit precautions: If hematocrit is greater than 25%, what level of exercise is recommended?

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

Answer: (C)

Hematocrit shows how much of your blood volume is made up of red blood cells, which carry oxygen to your muscles. When hematocrit is low, oxygen delivery is limited, so exercise must stay very gentle to avoid exhausting the heart and tissues. With a hematocrit just above 25%, there is enough red-cell mass to support some activity, but the oxygen demand should still be kept light to prevent fatigue or strain. Light exercise, such as slow walking or gentle mobility work, provides a safe way to maintain conditioning and circulation without overloading the body's oxygen delivery system. More intense efforts—like moderate or resistive exercise—would raise oxygen demands beyond what the current blood supply can reliably meet, risking symptoms like dizziness, shortness of breath, or undue tiredness. No exercise would be unnecessarily restrictive at this stage, and as hematocrit improves, activity can be progressed carefully with monitoring.