Related Experiment Video
Updated: Mar 28, 2026

Author Spotlight: Advancements in 3D Optical Imaging for Comprehensive Body Composition Assessment in Modern Research
Published on: June 7, 2024
CHANGES IN SOMATOTYPE CHARACTERISTICS IN THE MIDDLE-AGED BULGARIAN MEN
Emiliya Andreenko1, Silviya Mladenova2
1Plovdiv University "Paisii Hilendarski", Faculty of Biology, Department of Human Anatomy and Physilogy, 4000 Plovdiv, Bulgaria.. emiandre@abv.bg.
Objective:
the objective of this cross-sectional research was to outline the different somatotypes and the trends in the changes of the three basic components (endomorphy, mesomorphy and ectomorphy) among the middle-aged Bulgarian men.
Material And Methods:
the Heath-Carter method was used to identify the anthropometric somatotypes of 860 adult men, aged 30-50 years old, from the city of Plovdiv, located in Central Bulgaria. The men were divided into 4 age groups, in five-year intervals. In each case body height, weight and a series of skinfolds, circumferences and diameters were measured to calculate the somatotype. The SPSS package was used for the statistical analysis.
Results:
the results show a prominent endo-mesomorphic model in the study sample of male population. We found age-related increase of the values of the musclebone component, retention of the level of the fatty component and a decline in the ectomorphy. Regardless the quantitative changes of the three components, the correlation between them remains constant and the mean somatotype is preserved. A greater variety of morphotypes is found in the group of men aged 30-35. The most homogeneous group is that of the 45-50 year old men. This group is entirely dominated by the mesomorphic component (strength), and the endomorphic component (obesity) is greater than the ectomorphic one (linearity).
Conclusion:
the study finds that in the years between 30 and 50 the men tend to build muscle rather than fat. The 50 year-old men are more mesomorphic than the men at the age of 30, but they are shorter and with less elongated body segments.
Related Concept Videos
Signs of Puberty
Menopause
Changes in the Appendicular Skeleton with Age
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Bone Disorders
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Relationship Formation
Nature and Nurture

