Muscle mass asymmetry rating in body segments versus sports experience of junior volleyball players

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PhD, Associate Professor R.V. Kuchin1
PhD, Associate Professor N.D. Nenenko1
PhD, Associate Professor N.V. Chernitsyna1
Dr. Biol., Associate Professor M.V. Stogov1
1Yugra State University, Khanty-Mansiysk

Objective of the study was to rate and analyze muscle mass asymmetry in body segments versus the sports records in youth volleyball.
Methods and structure of the study. We sampled for the study the 19-21 years old Class I volleyball players to form the following groups by sport records: Group 1 (n=8) with the 4-5-year sports experience; group 2 (n=8) with the 6-7-year sports experience; and Group 3 (n=8) with the 8-9-year sports experience; plus a Control Group (n=8) of their unsporting peers. The segmental muscle mass was estimated using the two-energy X-ray absorption metrics to produce the asymmetry indices i.e. right-to-left-side segmental muscle mass ratios.
Results and conclusion. The tests found no significant intergroup differences between the sporting Groups 1-3 versus the unsporting Control Group. Groups 2 and 3 were tested with low upper-limb asymmetry ratios (0,98±0,05 and 0.97±0,02, respectively) versus Control Group and Group 1 (1,09±0,06 and 1.11±0,08, respectively) (p<0.05). On the whole, the volleyball players were tested with reductions of the upper-limb muscle mass asymmetry with the sports experience.

Keywords: volleyball, young males, sports experience, muscle mass.

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