Isometric strength in volleyball players of different ageMajstorović, Nikola (Avtor) Dopsaj, Milivoj (Avtor) Grbić, Vladimir (Avtor) Savić, Zoran (Avtor) Vićentijević, Aleksandar (Avtor) Aničić, Zdravko (Avtor) Zadražnik, Marko (Avtor) Toskić, Lazar (Avtor) Nešić, Goran (Avtor) isometric strengthabilitiesprofilemuscle forces predictiontrainingrehabilitationPhysical abilities modelling has a profound connection with long-term athlete development and talent identification. There is not enough data to support evidence about age-related changes in volleyball players’ isometric strength. This study aimed to define the age-related model of volleyball players multidimensional muscles’ contractile characteristics. The participants were divided according to gender (male n = 112, female n = 371) and according to age into four groups: under 15 (U15), under 17 (U17), under 19 (U19), and under 21 (U21) years old. Participants performed three isometric strength tests: handgrip, lumbar extensors, and ankle extensors. Maximal force and rate of force development results from all three tests were transformed into a single Score value as a representation of contractile potentials using principal component analysis. The main findings were that Score values of both genders showed significant differences between age groups (male: F = 53.17, p < 0.001; Female: F = 41.61, p < 0.001). Trends of those yearly changes were slightly more balanced for female subjects (3.9%) compared to male subjects (6.3%). These findings could help in strength training adjustments when working with volleyball players of a certain age, and enable coaches to detect ones that stand out positively, considering them as strong in regard to their age.20202021-12-07 14:21:31Članek v reviji133652sl