For citations:

Losev A.V., Vladimirov N.M., Vladimirov N.M. DEVELOPMENT OF SPEED AND STRENGTH ABILITIES IN VOLLEYBALL PLAYERS AT THE 4th YEAR TRAINING STAGE OF THE COMPETITION PERIOD. Severny region: nauka, obrazovanie, kultura. 2023;(3 (55)):70-76. (In Russ.) https://doi.org/10.34822/10.35266/2312-377X-2023-3-70-76