About the book: 2022 / In this book by Igor Borshchenko you will find a unique method of isometric muscle training to strengthen the deep muscles of the back and form posture. The peculiarity of gymnastics is that the muscles are tensed in special ergonomic positions, practically without movements or using special movements of small amplitude, which eliminates overload of joints and vertebrae. The technique is unique in its simplicity and accessibility. It is suitable for anyone who suffers from diseases of the musculoskeletal system, for patients who have been injured or have undergone surgery on the spine and joints, for those who experience pain in the back, arms and legs. Which means it’s completely safe!