Saratov JOURNAL of Medical and Scientific Research

Bragin M.A.

Federal Medical and Biophysical Center n.a. A. I. Burnazyan of Federal Medical Biological Agency, Junior Researcher of the Department of Experimental Sports Medicine, Candidate of Medical Sciences

Methods of evaluation of thermal tolerance of cyclic sports athletes


The purpose of the study is investigation of thermal stability in athletes of cyclic sports and assessment of its influence on physical working capacity under hyperthermia. Material and methods. 15 male athletes of cyclic sports who had the senior degree as minimum were included in the study Middle age 24,2±1,1 years. Work was performed in the climatic camera of the Center of sports medicine and rehabilitation in several stages, on each of which assessment of physical working capacity and a thermal condition of athletes was carried out. Results. In the real work the burdening action of the heating climate on indicators of physical working capacity and a thermal condition of athletes of cyclic sports is shown; the operating ranges of high temperatures are determined. Conclusion. The data obtained by means of the offered technique, confirm importance of definition of individual thresholds of shipping of a thermal state at athletes and the burdening action of a heat on their physical working capacity.

2017_04-1_955-964.pdf1.46 MB

Jetlag at sportsmen: influence on functional readiness and estimation of efficiency of methods of prevention and correction (the case of hockey players)

Year: 2017, volume 13 Issue: №4 Pages: 925-929
Heading: sports medicine Article type: Original article
Authors: Razinkin S.M., Evtukhovich I.V., Bragin M.A., Petrov A.A., Artamonova I.A.
Organization: Sports Club "Admiral" Union, State Scientific Research Center n.a. A.I. Burnasyan — Federal Medical Biophysical Center of Federal Medical Biological Agency

Purpose: to assess the role of the influence of jetlag on the functional state (before, during and after the flight). Materials and Methods. 26 male hockey players (average age 18.8±0.14 years, athletic category who had the senior degree as minimum), flying from Moscow to Vladivostok and back (with the intersection of 7-time zones) at least once a month. Evaluation the role of jetlag influence on functional condition of athletes and effectiveness of methods for the prevention and correction of these conditions at this stage of the work was conducted by methods of observation, interview and questioning. Results. The main complaints after the flight are: muscle weakness (up to 69%), sleep disturbance (up to 65%), fatigue (up to 58%), lethargy and drowsiness (up to 58%). The most significant prevention methods that contribute to improving the well-being of athletes themselves during a long flight are: organizational and bio-psychosocial factors (up to 81 %). Using methods of correction after the flight, the most effective were methods related to sleep hygiene (up to 85%) and the use of dietary supplements regulating sleep (up to 50%). Conclusions. The symptoms that occurred after the forced change of time zone, recorded by observation, interview and questionnaire, indicate a significant effect of jetlag on the functional condition of athletes, especially in the first three days after the flight. Most of the methods of prophylaxis and correction of jetlag proposed by us have shown their high efficiency both during the flight and after. Athletes are positive about the use of the proposed methods, but have little awareness of their existence, which requires the creation of an accessible information block that can be distributed among athletes by the doctors and the coaching staff of the team.

2017_04-1_925-929.pdf251.93 KB

Evaluation of the effect of a special cooling liquid on thermal state of athletes at high temperatures


Aim. The article presents the results of the effectiveness of cooling liquid. In addition, the way it affects the thermal state of athletes at high temperatures. Material and Methods. The study involved seven male athletes of cyclic sports. The sportsmen had a senior or higher and an average age of 19.29±1.80 years. All passed a 2-fold examination, which included collection of anamnesis, complaints about health, medical examination, weight measurement, subjective evaluation of heat thermometry (rectal and skin (in 5 points)), ergospirometry testing. Changing the thermal state of the athletes, founded by the dynamics of average skin temperature and rectal temperature. Also, subjective evaluation of thermal sensations was taken into account. Meanwhile the efficiency of special cooling liquid determined by the dynamic run-time load, maximal oxygen uptake and anaerobic threshold of exchange. Results. The use of special cooling liquid makes it possible to increase the time of aerobic load tolerance in conditions of high temperatures by an average of 2.5%. This was accompanied by a decrease in rectal temperature and average skin temperature throughout the stress test. There is also a positive effect on the subjective level of heat sensations. Conclusions. We conclude that it is advisable to use cooling liquid for summer sports teams in the performance of a specific physical activity. However first conducted individual tests on the subject of possible adverse allergic reactions.

2017_04-1_919-925.pdf1.03 MB