Yi Jin Jing (Tendon-Muscle Strengthening Exercises) is a health and fitness exercise handed down from ancient China.Based on the traditional 12 routines of Yi Jin Jing, Health Qigong—Yi Jin Jing features the same names and key points of the original exercises while putting the theory, skills and effects on the same solid foundation as knowledge of health and fitness Qigong, traditional Chinese medicine and other related scientific fields.