Today, women are concerned with health promotion but also with improvements in
body weight and shape. The purpose of this study was to investigate the effects of aerobic exercise training (
AET) combined with isolated
soy protein (ISP) supplementation on the body composition, anthropometric characteristics, and cardiopulmonary endurance of women. The qualified subjects were randomly assigned to
AET or
AET + ISP groups. Women in the
AET + ISP group were given an ISP-rich supplement (40 g/day) 5 days a week for 8 weeks; those in the
AET group were given the same amount of water in an identical manner. All women received 60 min of
AET twice a week for 8 weeks at an intensity of 40-65% heart rate reserve (HRR) and their body composition, anthropometric characteristics, and physical fitness were measured one week before and after the 8-week
AET class. A total of 16 subjects (age: 36.13 ± 5.76 years) completed the study and were included in the dataset. The results of this study show that the
AET + ISP group obtained greater reductions in
body weight (effect size = 0.99), body mass index (BMI, effect size = 1.04), percentage body fat (PBF, effect size = 1.18), circumferences (waist and hip, all effect sizes > 0.8), and greater gains in the percentage lean body mass (PLBM, effect size = 0.89), compared with the
AET group, without significant differences in 20 m multi-stage shuttle run test (20 m MST). We conclude that there is a trend for the consumption of ISP following
AET to improve the body composition and anthropometric characteristics in women, compared with those who received the same
AET without ISP supplementation.