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Background: A literature review and an analysis of lifting techniques indicate that the tissue composition and structure of the body, and especially some of its elements have a decisive influence on the results. The objective of the reported study was to characterize tissue components of the best Polish male weightlifters in view of the age and sports results they achieve. Material/Methods: Competitors of the Men’s Polish Championships in Weightlifting in 2004 were subjects of this study. The study comprised 138 sportsmen evaluated in the following age categories: seniors, youth, older juniors, and younger juniors. Measurements that enabled estimating the tissue composition of the body were taken with Piechaczek’s method by. In the evaluated groups, sports results achieved in the Championships were converted into points according to Sinclair’s scale. Arithmetic means and standard deviation (SD) as well as the number of points scored were computed in each age category. The value of Pearson’s correlation coefficient was computed between the discussed somatic traits and obtained results. Results: Out of all the surveyed participants of the Polish Championships in Weightlifting only younger juniors were characterized by too high values of body height, which may affect their body mass to body height proportions. Conclusions: The analysis of results of the tissue composition of the body in age categories and with consideration given to the level of achieved sports results demonstrated that along with training experience and its level, the content of real active tissue was increasing in the surveyed sportsmen. Word count: 2,710 Tables: 4 Figures: 0 References: 14 Received: December 2011 Accepted: February 2012 Published: March 2012 Corresponding author: Dr Agnieszka Wasiluk Faculty of Physical Education and Sport, Department of Nutrition and Development of Human Biological ul. Akademicka 2, 21-500 Biala Podlaska E-mail: agnieszka.wasiluk@awf-bp.edu.pl Phone: +4883 3428741 1 The study was supported by grant No. AWF-VII-155 of the Polish Ministry of Science and Higher Education J. Saczuk, A. Wasiluk, Dependence between Body Tissue Composition and Results Achieved by Weightlifters 16 Introduction Nowadays, both sportsmen and coaches face growing demands which result from a high level of sports competition. Hence in contemporary sport, high results are achieved only by few sportsmen, i.e. those physically talented having sound fitness, technical, mental and theoretical training. Nevertheless, each sports discipline should possess a well-documented “model of champion”, especially in terms of somatic composition [1]. The body mass of individuals with the same value of this parameter may be characterized by different content of muscle, adipose and osseous tissues. The contribution of particular tissue components in the total body mass plays a significant role in athlete’s somatic build. Therefore, studies are undertaken to enable determining, among other things, somatic predispositions of athletes achieving the best results in a number of sports disciplines [2, 3, 4, 5 et al.]. An overview of literature on weightlifters’ somatic traits [6, 7, 8, 9 et al.] indicates that these sportsmen should be characterized by appropriate proportions of body height and body mass. Longitudinal measurements, including stature, serve a minor role, for this is the “weight” discipline of sport. Therefore, sportsmen of lower weight categories should have small longitudinal measurements which should increase along with the increasing weight category. When considering the dependence on the tissue composition of the body, the most significant to weightlifters are a high mass of the active tissue, reflected in abovethe-average skeleton stoutness and the well-developed muscle system, with a low content of the adipose tissue. In view of the above, the objective of the reported study was to characterize tissue components of the best Polish male weightlifters in view of their age and the sports results they achieve. Material and Methods Competitors of the Men’s Polish Championships in Weightlifting in 2004 were subjects of this study. The study comprised 138 sportsmen evaluated in the following age categories: seniors, which included 31 men; youth (under 23 years) and older juniors (under 20 years), 34 sportsmen each, and younger juniors (under 16 years), which included 39 competitors. Anthropometric measurements were performed with a use of an anthropometer (body height) and a skin fold caliper (the skin folds thickness on the left side of the body). The density of the body (D`) was calculated by Piechaczek’s formula [10] using three skin folds thicknesses: the thickness of the arm, the shank and the chest. D`= 1.124358 – 0.000120 x the arm skin fold (log) – 0.000167 x the chest skin fold – 0.000075 x the shank skin fold The total body fat percentage of body weight (FM%) was calculated by Keys and Brozek’s formula [10]: ) 813 . 3 ` 201 . 4 ( 100 % − = D x FM The total body fat in kilograms (FMkg) was calculated using the formula: 100 FM% (kg) mass x body FM kg Active tissue of body mass in kilograms (FFMkg) was calculated using the formula: FFM kg= body mass (kg) – FMkg Active tissue of body mass in percentage (FFM%) was calculated from the formula: