The project consists of a cross-sectional study in which anthropometric variables, general and specific performance variables of volleyball will be measured, and the biological maturity stage will be calculated. The main objective is to establish a relationship between the biological maturation state, the anthropometric characteristics and the performance in physical fitness tests in volleyball players between 12 and 15 years of age. To do this, there will be all the clubs in the Region of Murcia that have federated teams in these categories.
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Volleyball performance
Timeframe: through study completion, an average of 1 year
Biological maturation
Timeframe: through study completion, an average of 1 year
Muscle mass
Timeframe: through study completion, an average of 1 year
Fat mass
Timeframe: through study completion, an average of 1 year
Bone mass
Timeframe: through study completion, an average of 1 year