Separately, aerobic and resistance training programs have resulted in positive effects on body composition. One latest exercise trend focuses on combining aerobic and resistance training components in one exercise session. Current aerobic dance classes often incorporate aerobic and resistance training elements, thus qualifying as concurrent training. Physiological effects of concurrent training and effects of the order of this training, specifically on body composition, have largely been unexplored. PURPOSE: To identify changes in body composition, utilizing air displacement plethysmography, of two groups of college women following twelve weeks of concurrent training with different sequencing of training. METHODS: Forty-eight female students were assigned to one of two groups. The first group (RA), 32 females (20 +/− 2 yrs) participated in a class that began with a 5–10 minute warm-up, 5–10 minutes of resistance training, utilizing exercise bands, followed by 20–30 minutes of aerobic training. The second group (AR), 16 females (20 +/−2 yr) participated in a class that began with a 5–10 minute warm-up, 20–30 minutes of aerobic training then 5–10 minutes of resistance training, utilizing exercise bands. Subjects participated in classes 3 days a week for 12 weeks. Body composition was measured using air displacement plethysmography with predicted residual volumes pre- and post-study. Independent t-tests were used to determine significant differences between the RA and AR groups as a result of concurrent training. Dependent t-tests were used to determine pre-post changes for the experimental groups. RESULTS: When groups (RA & AR) were combined and analyzed, a significant difference was found in percent body fat (pre, 30.86±6.22 vs. post, 29.87±6.58%, p < 0.05) and lean body mass (pre, 91.35±9.56 vs. 92.19±9.57lbs., p < 0.05). In addition, when comparing differences within each group, both RA and AR groups showed significant differences in percent body fat and fat weight (RA percent body fat pre, 31.39±7.00 vs. post, 30.47±7.43%; RAfat weight pre, 44.48±22.18 vs. post, 43.18±22.88lbs.;AR percent body fat pre, 29.81±4.27 vs. post, 28.68±4.41%; AR fat weight pre, 38.90±10.18 vs. post, 37.30±10.06lbs.; p < 0.05). However, when comparing the two groups for differences in the sequence of training effect on physiological factors, no significant differences were found with any variable. CONCLUSION: Twelve weeks of concurrent aerobic and resistance training in college-age females resulted in increased lean weight and decreased percent body fat. However, no differences were found for the sequencing effect on physiological factors.