This is how boxers develop with a heavy ball 

In this video we show you interesting coordination and agility exercises with a heavy ball. The purpose of balls in boxing is primarily to develop coordination, increase explosive power, reaction and attention of the boxer. These exercises will help you to move properly, defend yourself and react quickly and make correct decisions during combat. You will be steadier, more attentive, and very sharp in the fight. Exercises with a heavy ball will be useful not only for boxers, but also for all athletes who want to improve their qualities and achievements.
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Author's training programs by Sergei Raab.
1.Basic
2.Legs position and development in boxing
Cost and order:
E-mail: shkola_boksa_raab@mail.ru