Beall and her team studied 417 Tibetan women, aged 46-86, living at altitudes of 12 000 to 14 000 feet in Upper Mustang, Nepal.
They had average hemoglobin levels but higher oxygen saturation, allowing effective cell oxygen transport without increasing blood viscosity, which can strain the heart.
Beall and her team studied 417 Tibetan women, aged 46-86, living at altitudes of 12 000 to 14 000 feet in Upper Mustang, Nepal.
They had average hemoglobin levels but higher oxygen saturation, allowing effective cell oxygen transport without increasing blood viscosity, which can strain the heart.