This research problem was to determine differences between effects of the two aerobics programs conducted with the students of physical education, relative to particular characteristics of the body tissue. The appropriate sample was made up of 149 1st year male students at the Faculty of Physical Education in Novi Sad 19 years of average age, who attended regular classes of Anthropomotorics. The students were classified in two experimental groups, worked according to the model of high-low (52 students) and step aerobics (54 students), and one control group (43 students), performed as per the regular curriculum for the subject of anthropomotorics. Changes which occurred in students, practiced three times a week in six week period, were monitored through three body tissue measures. Results of the research showed that there were significant effects in transformation of characteristics of the body tissue in both experimental groups, which was not observed in the control group. This proves that experimental programs of high-low and step aerobics had significant effects on the subject characteristics. It was also determined that the experimental program of high-low aerobics had more adequate effects on improvement of constitution parameters, as there was a significant decrease of fat tissue and increase of water content of the body.
