The aim of this study was to determine the effect of 8 wk different kinds of endurance exercises performed under hyperthermic environment on some physical, physiological and blood parameters. Twenty-four volunteers-physical education and sports students, who did not have any health problems and not allowed to drink water during the exercise-participated in this study. Subjects were divided into two groups [Interval (IT) and Continuous (CT) training group]. Both groups were performed 3 days/wk. Thyroid hormones (TSH, FT4, FT3, T3 ve T4 ), cholesterol levels (TG, HDL-K, LDL-K and VLDL) and maximal oxygen intake (VO2max) were assessed at the beginning and of the training period. Body temperature (TB) and physiology parameters (by Tanita –TBF 300) were also measured at the beginning and immediately after each training. The 8 wk endurance training and exercise type affected only plasma LDL-K in CT gruop (P<0,05). There was no significant difference between the values of thyroid hormones and plasma cholesterol levels both within the group and between groups.

According to the first training results there were significant difference between pre and postexercise values in TB, bady water percentage (BWP) and basal metabolism (BM) in both groups (P<0.05). But when compared the first and last training, the groups had lower TB values for IT than CT (p<0,01). VOmax2 values of both groups increased significantly (P<0.01). There was no significant difference between groups. As a result of this investigate while continuous training observed reduction of LDL-C cholesterol, interval training was detected more effective than continuous training at thermoregulation.