PhD S.V. Skrygin¹
PhD A.L. Yurchenko¹
PhD, Associate Professor V.L. Anurov¹
Associate Professor Y.O. Averyasova^2
1Financial University under the Government of the Russian Federation, Moscow
²Plekhanov Russian University of Economics, Moscow

Objective of the study was to analyze the neuromuscular system adaptability in high-intensity trainings of junior sprinters in an annual training cycle to find the acceptable adaptability range.
Methods and structure of the study. We sampled for the study the Class II/ III junior sprinters (N=20) in the annual training cycle including 10 training mid-cycles with different priorities. Prior to every mid-cycle, the sample was tested by the 60/ 100/ 200/ 300m sprints at maximal and sub-maximal speeds. The tests generated the pre- and post-sprint maximal/ explosive speed-strength rates, with the post-sprint tensometric tests timed to the 1, 3, 5, 7 and 10 minutes of the rest time. The 10-minute speed-strength capacity rehabilitation profiles were used to rate the individual adaptabilities versus the sprint distances and intensities.
Results and conclusion. The test data analyses found five speed-strength capacity rehab options upon the maximal/ sub-maximal speed tests with the relevant excessive, permissible and optimal workloads. Thus the permissible trainings were found to improve the neuromuscular system performance with the so-called post-stress excitement phase lasting for 10 minutes in the rest breaks when the muscular working capacity stays virtually the same with a minor fall.

Keywords: athletics, sprint training of junior athletes.

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