Joint hypermotility syndrome (JHMS) was studied in 304 patients (255 women, 49 men, age 16-50 years) divided by age into four groups (16-20, 21-30, 31-40, 41-50). It was found that the incidence rate of such symptoms as polyarthralgia, recurrent exudates and incomplete joint dislocations with age lowers while that of dorsalgia, oligoarthralgia, soft tissue rheumatic syndromes, fibromyalgia rises. A monosymptom variant was characteristic for patients of the age 16-20 years. It manifested with one of the above symptoms (polyarthralgia, dorsalgia, recurrent exudates and incomplete joint dislocations). A syndrome variant, manifesting with combination of several clinical symptoms, was typical for patients over 30. This reflects systemic involvement of connective-tissue structures in the pathological process in JHMS and accumulation of degenerative alterations in the locomotor system with age.