The core is the overall middle region of the body, including the lumbar spine, pelvis, hip joints and surrounding muscle groups. Mainly the spine, hips, pelvis, proximal lower limbs and abdomen, the rectus abdominis, oblique abdominis, erector spinae and lumbar square muscles are the prime movers of the overall muscle group, while the transverse abdominis, multifidus, vastus abdominis and skeletal rib muscles are the muscles that maintain local stability. The core, which is integrated into multiple links in the movement, is the basis of the physiological structure of muscle power, stability and flexibility, and maintains the balance and power of the movement by interacting forces. Core strength has the function of controlling body balance, stabilizing the body’s center of gravity, and transmitting movement power. In addition, core strength training can improve muscle endurance and body balance, if the core muscle groups get a good workout, can somewhat reduce the risk of injury in the process of exercise. The core strength can generally be improved by means of Pilates, with the help of fitness equipment such as Swiss balls, balance boards, bouncy bars, and small trampolines. However, it should be noted that core strength training is generally arranged in the middle and late stages of training, training under the guidance of professionals, need to be carried out according to their own circumstances to avoid injury.