Flexibility, the ability to move joints through a full rang of motion, often benefits maximal performance, whereas limited flexibility is a factor in sports injuries. An individual's flexibility decreases without training, even during childhood and adolescence (Hupprich & Sigerseth, 1950; Martin, 1977; Milne et al., 1976). The trend toward declining flexibility represents the average state of fitness among representative groups of people. It does not indicate that everyone automatically loses flexibility. In fact, athletes, dancers and other engaged in flexibility training usually maintain or improve their rang of motion as they age (Munns, 1981; Germain & Blair, 1983; McAdam & Smith, 1988). The flexibility trend of the 15 to 55 years old aerobics trainees have been the aim of this paper. The 300 women from AP Vojvodina (Novi Sad, Zrenjanin, Ruma) were the sample and they were divided into subsamples on years criteria. The following research technique is used: measuring the motor manifestation (6 flexibility tests). The inclining - declining trend of results of every test was shown.
