The present paper is based on the Research Project entitled "Impact of Technological and Economic Development Programme on Bio-Cultural Heritage of Gaddis and Pangwalas Population Groups of Himachal Pradesh". The project was framed after UNESCO/MAB Project Nos. 6 and 12 under UNESCO Programme on Man Biosphere (MAB) and supported by the Department of Science and Technology, Government of India. The population groups under investigation are: 1. Transhumant Gaddis of Bharmour Sub-Tehsil, Chamba District; 2. Settled Gaddis of Kangra District; and 3. Pangwalas of Pangi Tehsil, Chamba District, Himachal Pradesh. The carrying capacity has been calculated for Pangi and Bharmour Sub-Tehsil and it has been observed that in both the places the size of population is beyond the capacity of the land. The pattern of body growth and respiratory functions among Transhumant Gaddis of Bharmour Sub-Tehsil, Chamba District and Settled Gaddis of Kangra District have been studied. Statistically non-significant differences in most of the biological variables have been observed among these groups.