Performance Nutrition Digest

Performance Nutrition Digest

Head up sleeping increases red blood cell volume🩸

Sleeping position might make you a better endurance athlete.

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Tom Coughlin
Jun 06, 2026
∙ Paid

Did You Know: Erythropoiesis Is Regulated by Changes in Posture

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Study Details

This new study investigated the effects of sleeping with either…

1️⃣ Head-up sleeping position (HUS) - 6% tilt up

2️⃣ Horizontal sleeping position (CON)

…on erythropoiesis a…

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