Derliaus nuėmimo sezonas trumpas ir pasižymi orų kaita. Tad svarbu, kad visi javų kombaino mechanizmai dirbtų patikimai. Riedėjimo guolis yra vienas iš svarbiausių komponentų įvairiuose mechanizmuose. Netikėti guolių gedimai gali sukelti sustabdyti javų kombaino darbą. Naudojant vibroakustinę analizę galima būtų tiksliau spręsti kombainų kūlimo būgno dinamikos klausimus. Tuo tikslu buvo tiriamas javų kombaino kūlimo būgno guolis naudojant vibro analizės metodą. Tyrimams pasirinktas Massey Ferguson 38 firmos klavišinio kombaino kūliamojo būgno guolis D41715000 (SRN EX210.G2. Matavimai atlikti Bruel&Kjaer firmos vibracijų matavimo ir PULSE programine įranga. Vibracijų matavimai buvo atliekami prieš rugiapjūtę ir po rugiapjūtės darbų. Atliktas guolio teoriniai defektinių vibracijos dažnių skaičiavimas. Teoriniai rezultatai palyginti su eksperimentiniais. Iš gautų rezultatų galima teigti, kad nustatyti guolių techninę būklę ir nustatyti jo darbingumą, neišardant viso mazgo naudojant vibro analizės metodą yra įmanoma.

At present time, the rational search for a protection of cardiovascular system of athletes and the assessment of such protection efficiency are the very important problems in sports pharmacology and sports cardiology. It is worth noting that athletic training pharmacology, aimed at the stimulation of physical workability in the majority of sports events, can become, together with overloads, the principal reason for a deterioration of health and life’s quality as well as for the sudden death of athletes without a proper cardioprotection. The problem of protection is significantly complicated under modern conditions due to the permanent hardening of anti-doping sanctions (e.g., the recent ban on the use of trimetazidine and meldonium) that essentially limit the possibilities for sports cardiologists. Therefore, the most grounded exit, from the current position, is the use of metabolitotropic medications, in particular, those on the basis of L-carnitine (gamma-butyrobetaine). The wide spectrum of physiologic and biochemical influence of this substance on organism gives possibility to moderately affect the physical and mental workability of athletes even under the conditions of long-term intense physical loads. The complex action of pharmacological agents on the basis of L-carnitine on organism allows one to use it on all stages of the preparation with high efficiency of the cardioprotective and ergogenic effects. Despite the bans of WADA, sports cardiologist possesses a sufficient pool of pharmacological agents that can ensure the protection of myocardium under conditions of training process and competition and can preserve athlete’s health as well as his/her physical workability.

Today it is a well-established fact that scientifically substantiated, competent and individualized usage of macro-, micro- and pharmaconutrients is capable of optimizing human capacities, increasing muscle contraction strength, general and special endurance in professional, highly skilled athletes. It is quite obvious that balanced nutrition is a key to providing athlete body with the main substances and energy necessary for the high level of motor activity. The paper considers the role, the place, the validity and the efficiency of dietary supplements utilization in the course of athlete preparation on the basis of March 2018 the IOC Consensus statement on dietary supplements usage by elite athletes, which has become the main regulatory document for specialists of sports medicine and nutritiology. The Consensus has formulated the concept of ergogenic nutritiological means that in future will enable to revise the system of sports preparation pharmacological support in European countries, bringing it closer to world standards. The work briefly highlights the development of sports nutritiology as a science and practice of its provisions realization in elite sport. Based on the Consensus provisions, 4 main classes of dietary supplements for sport have been outlined: 1) functional food, food enriched with additional nutrients or components, different from the usual nutrient composition; 2) specially formulated compounds and sports nutrition for providing energy and nutrients in a more convenient form than regular food for nutritional support in sport; 3) individual nutrients and other food components or plant products in isolated or concentrated forms; 4) multi-component products containing various combinations of substances with a certain intended use.

In addition, the main, more highly specialized groups of dietary supplements have been classified with indication of their representatives, the fundamental differences between dietary supplements and ergogenic pharmacological preparations have been formulated, thus enabling reasonable nutritional and metabolic support of functional and structural reorganizations in the body of athlete, when it forms the prerequisites for emergence of new own ergogenic characteristics.

The article emphasizes that the problem of dietary supplements usage has many unresolved issues of organizational and informational nature, focuses on the formation of holistic algorithm for these ergogenic means utilization, which requires highly qualified specialists – sports nutritionists, above all. The authors present their vision of managing preparation of such specialists in the post-Soviet space, which should become the key to the rational use of dietary supplements in order to increase the competitive process efficiency of members of the national Olympic teams along with preservation of athletes’ health.