The study was participated by a group consisting of 20 working sedantary subjects, 10 males and 10 females, with an avarage age of 26.9 ± 2.1. In order to determine the physical fitness levels of the participants, we noted down the age, stature, body weight, body composition values, body mass index, fat ratio, fat weight, peripheral measurements, elasticity, oxygen consuption capacity, jumping ability, and explosive power levels of each subject. Measurements were made at the biochemical laboratory in order to determine the blood profiles. Statistical evaluations were made employing the “ANOVA” test by calculating the average ± standard deviation, and the values by sex were obtanined by employing the X2 test. As a result of our study, it was found out that the 10-weeks aerobic exercise programme in young and working sedantary people provided no significant results in terms of physical fitness except for the flexibility tests values; nor it had any significant influence on the blood parameters except for the blood glucose, plasma sodium and creatinine.