The Spinal Engine Theory is a biomechanical concept that suggests the human spine plays a central role in generating movement, especially in activities like walking and running, rather than merely transferring forces from the legs to the upper body. It was proposed by Dr. Serge Gracovetsky in the 1980s and challenges the traditional view that locomotion (e.g., walking, running) is primarily driven by the legs. . Applications and Implications: * Sports Performance: Athletes who rely on rotational