GRAVITY TRAINING SYSTEM is a series of gravity fitness systems developed by efi Sports Medicine (explained later), one of the most powerful sports medical organizations in the United States, which combines the gravity resistance and functional training developed by efi. The agent in China is Sino-American Gravitation, founded by Xie and Liu Xiaojin, pioneers of fitness industry in China. Gravity system effectively combines equipment and courses, and is carefully designed for the gym to expand fitness programs. Multifunctional GTS instruments and easy-to-learn course items improve the use value of a single instrument. Gravity systems focus on many health and fitness goals. From increasing muscle, tightening and reducing fat to joint and muscle rehabilitation training to improve sports performance. GTS equipment takes pulley system and body weight as resistance, and uses height-adjustable skateboard to measure fitness progress, so as to meet personal needs for health and fitness. At the same time, it also combines ideal biomechanics and physical principles. The gravity project will provide personalized effects for all people who want to have an active and healthy lifestyle. The key to its turning point also includes training, management, market support to help start various courses and continuous profit creation.