Studies of the relatively large native populations that live above 10,000 ft in south. America and central asia in order to learn how these people cope, culturally and biologically with the stresses imposed by their environment. Sherpas who inhabit the khumbu region of eastern nepal. A high altitude change must cope with the marginal nutrition and poor nutrition may be attributed to cultural values concerning food selection, preparation, and distribution. Most common for nunoa are potatoes and grains, along w rice and maize; caloric intake is highly variable and may not be adequate during childhood years or during periods of physiological stress. Most common for sherpas is potato and they have greater caloric requirement. One biological consequence of inadequate caloric or protein intake is growth retardation. Research in nunoa has revealed that the chest sizes of quechua children and adults are larger than those of people in the us and it is linked to their large lung volumes.