What is the optimal sleeping altitude?
Medical board of advisors recommends 12,000 -15,000 feet above sea level. Studies showed the importance of sleeping as high as possible up to 15,000 feet (but no higher). There is very little gain at altitudes from the 15,000 feet to 18,000 feet window. While the body gets stronger from altitude in the range of 12,000- 15,000 feet, scientific data suggests that above 18,000 feet that fitness decreases.