Squatting insufficiency may be caused by ankle, knee and hip joint hypermobility, etc. The correct training method for squatting insufficiency may choose to relax or strengthen the muscles around the corresponding joints to train. 1. Inadequate mobility of the ankle joint (1) Relax the plantar fascia: use a fascia ball or tennis ball to roll on the sole of the foot, massage the plantar muscles and relax the plantar fascia. (2) Relax the posterior calf fascia: stretch and massage the posterior calf muscles. (3) Ankle dorsiflexion and plantarflexion training: carry out hooking the dorsum of the foot and tiptoeing exercises. 2. Inadequate knee joint mobility: carry out passive knee flexion training first, when the passive knee flexion training can reach a certain angle, if the active knee flexion is obviously limited and the angle of passive knee flexion cannot be reached, the active knee flexion exercise should be strengthened in order to reach the angle of passive knee flexion. 3. Insufficient hip mobility (1) Tightness of anterior or posterior thigh muscles: the anterior or posterior thigh muscles need to be stretched and massaged. (2) Tight gluteal muscles: stretching and massaging of the gluteal muscles can be performed. (3) gluteal muscle contracture: this condition needs to go to the hospital for surgical treatment. Squatting incomplete correct training methods should be carried out under the guidance of a doctor, do not train blindly, so as not to cause sports injuries.