The purpose of the present work is to study and assess the age features in the development of the subcutaneous fat tissue, limbs' muscularity and interactions between muscles and fat in men at active-working ages from different professional groups. The data about 9 standard skin folds, 7 circumference of body and limbs as well as muscle-fat relation of arm and thigh in 786 men at the age of 30-50 have been analyzed. The subjects were from 4 professions with different physical activity (smelters, carpenters, fitters, and drivers). They were divided in two age groups: 1st group -30-40 years old, and 2nd group -41-50 years old. The results show that the men from all professions with the age advancing have bigger circumference body sizes but their limbs sizes are not considerably changed. The age changes are not more than 10% in the absolute quantity of measured subcutaneous fat tissue in all professional groups. More definite differences in the age aspect have been observed regarding the topical distribution of subcutaneous fat tissue in the body and limbs in the separate professional groups. .
