Zelenskiy K.G.
Stavropol State Pedagogical Institute, Stavropol

Ponomarev G.N.
The Herzen State Pedagogical University of Russia, St. Petersburg

Kostyuchenko V.F.
Lesgaft National State University of Physical Education, Sport and Health, St. Petersburg

Zverev V.D.
Lesgaft National State University of Physical Education, Sport and Health, St. Petersburg

Objective of the study: To identify the features of the functional state of 15-16 year old athletes in sports radio direction finding during energy supply of muscle work in conditions of aerobic-anaerobic transition.

Methods and structure of the study: The research was conducted in Kislovodsk in November 2023 under the conditions of a training camp, in which 12 members of the Russian youth national team in sports radio direction finding aged 15-16 took part, including 1 -- Master of Sports, 8 -- Candidate Master of Sports, 3 athletes of the 1st category. During the experiment, a test was conducted using a treadmill. Muscle work was performed with a gradually increasing load until «failure». Air was sampled to measure the concentration of oxygen and carbon dioxide in it, heart rate and lactate concentration in the blood were determined. Based on the data obtained, the values of aerobic and anaerobic thresholds were determined, expressed in running speed, the level of minute oxygen consumption and heart rate.

Results and conclusions: It has been established that the blood lactate concentration values in qualified 15-16 year old athletes in sports radio direction finding at aerobic and anaerobic thresholds are localized within the generally accepted limits and equal, respectively, 2,4 and 4,3 mmol∙l^‒1^. The average running speed at the AeT level corresponds to 3.01 m∙s^‒1^, at the AnT level ‒ 4,02 m∙s^‒1^, at the VO2max level ‒ 4,71 m∙s^‒1^. The most informative performance criteria in sports radio direction finding in qualified 15-16 year old athletes are the oxygen consumption values at the AnT level, running speed at the AnT level and VO2max.

Keywords: Sports radio direction finding, maximum oxygen consumption, aerobic threshold, anaerobic threshold, lactate, pulmonary ventilation, oxygen pulse.

References:

1. Zakharevich A.L., Marchenko D.S., Titova E.M. Prakticheskiye aspekty stress-testa s gazoanalizom sportsmenov razlichnykh vidov sporta [Practical aspects of stress testing with gas analysis of athletes of various sports]. Practical guide. Minsk: RNPTS sporta publ., 2022. 36 p.
2. Zelenskiy K.G., Ponomarev G.N. Issledovaniye zon intensivnosti pri prokhozhdenii klassicheskoy distantsii v sportivnoy radiopelengatsii yunoshami 13-14 let [Intensity zones on classical distances in amateur radio direction finding for 13-14 year-olds]. Teoriya i praktika fizicheskoy kultury. 2018. No. 12. pp. 57-59.
3. Tikhvinskiy S.B., Bobko Ya.N. Opredeleniye, metody issledovaniya i otsenka fizicheskoy rabotosposobnosti detey i podrostkov [Definition, research methods and assessment of physical performance of children and adolescents]. Detskaya sportivnaya meditsina. S.B. Tikhvinskogo, S.V. Khrushcheva [ed.]. Moscow: Meditsina, publ. 1991. pp. 259-273.