S plan line machine has exclusive patented servo motor, intelligent sensor, precise control algorithm and other high-tech blessing, which realizes intelligent and scientific millisecond millimeter electronic counterweight, replaces the bulky, non-interactive and imperceptible physical counterweight module in traditional fitness equipment, and supports shaping and fat reduction. A variety of muscle exercises and cardio-pulmonary strengthening fitness programs can cover seven core muscle groups of the human body. At the same time, they also have the advantages of smaller floor space, higher safety and lower learning and use costs, helping fitness enthusiasts to enjoy a safer, higher-end and more scientific exclusive exercise and fitness experience at will without leaving home. It can be called a home smart gym. There is no need to apply for a card, no psychological pressure, no time to go to the gym, and no need to overcome social phobia.