Leakage of urine during exercise is generally stress incontinence, but it can not be ruled out that it is caused by prostate enlargement, cystitis and other diseases, and should be promptly consulted to identify the cause. 1. Stress incontinence: mostly seen in multiple childbirth or birth injury, normal birth canal birth can lead to the relaxation of the birth canal, causing excessive bladder and urethral peripheral tissues, resulting in a decrease in the contraction ability of the urethral sphincter, during exercise, coughing, abdominal muscle contraction, causing an increase in intra-abdominal pressure, can induce urinary leakage. 2. Prostatic hyperplasia: Prostatic hyperplasia can compress the prostate urethra or bladder urethral orifice and lead to obstruction, thus causing urinary frequency, urination difficulties and other symptoms. When the obstruction is aggravated to a certain extent, filling incontinence can occur, causing symptoms of urine leakage during exercise. 3. Cystitis: most patients with cystitis can have abnormal urination, manifested as frequent urination, painful urination, urinary urgency, and in severe cases, urinary incontinence can occur during exercise, causing urinary leakage. Patients with cystitis may be accompanied by symptoms such as cloudy urine and painful sensations in the perineum. In addition, leakage of urine during exercise may also be caused by urethritis and other diseases, patients with leakage of urine should consult a doctor in time to find out the cause of the disease, the doctor to make a clear diagnosis, and if necessary, to carry out the appropriate treatment.