The research team of Sports Medicine Department of China Medical University found that the higher the heel of high-heeled shoes, the easier it is for the front and rear muscles of the calf to contract at the same time, leading to muscle fatigue. If you put the insole to reduce the contraction, you can walk more smoothly and extend the time when the muscles begin to ache. The research team of Sports Medicine Department of China Medical University used half a year to place customized insole in shoes with heights of 1 cm, 5. 1 cm and 7.6 cm for 15 women who had never worn high heels, and observed the muscle contraction of the subjects with electromyography. The results show that the insole can reduce the contraction of the muscles in the front and back of the calf at the same time, making the walking more stable. The research team explained that when walking in normal flat shoes, calf muscles contract and release; Because walking in high heels is not smooth, the muscles on both sides of the calf need to contract at the same time to control. Experiments have found that ordinary people will start to feel sore after walking in high heels for 30 minutes. If you add insoles, the time can be increased to half a day, but it still depends on the material and comfort of insoles. Peiling Cai, head of the physiotherapy center of the medical institute, said that the function of insoles is to cushion, prevent earthquakes and reduce the reaction force when walking, but the design of high-heeled shoes is not in line with the human body, no matter whether the whole foot, sole or heel insoles are used. Wearing high heels for a long time will not only cause muscle soreness in the feet, but also have an impact on the feet, such as hallux valgus and plantar fasciitis. The research team suggested that if high heels are not allowed to be worn in social occasions, try to avoid choosing shoes with heels more than 5 cm (about 2 inches), and women in the workplace can prepare a pair of flat shoes and replace them at any time; In addition, although insoles can relieve stress, the best way to avoid foot pain and injury is to wear less high heels. Subscribe to the health Aloha audio-visual channel, read health knowledge more easily, and pay attention to your health every day! Line @ ID: @:/supply/article/8683/Research on the higher the high heels, the easier the calf muscles are to ache. Key words: high heels, calf, soreness, hallux valgus, plantar fasciitis, Peiling Cai.