The purpose of the study was to investigate the effect of a “VAAM” (Vespa Amino Acid Mixture) sports nutrititional drink on body composition. Fifteen female volunteers participated in the study. The subjectrs were divided into two groups on the basis of age and body weight: control group (n=7, 44.9±7.0 years old, 155.6±4.8 cm, 61.0±7.3 kg), and VAAM group (n=8, 42.0±9.7 years old, 160.5±3.9 cm, 59.3±6.9 kg). The duration of the study was eight weeks. Body composition was measured before and after the experimental period. Subjects were required to perform aerobic dance (65-70% maximum heart rate) 4 times/week, I hr/session. Twenty minutes before each aerobic dance, 190 g of F VAAMJ sports nutritional drink (carbohydrates: 9.5 g, amino acids: 2.7 g; 48.8 Kcal) or placebo (carbohydrates: 12.2 g; 48.8 Kcal) was given to each subject. After 8 weeks of aerobic dance and/or dietary supplementation, there were no significant changes in body weight, body water, lean body mass, muscle mass, body protein content, estimated bone mass, body mass index (BMI), body fat percentage, triceps skinfold (TSF), or waist-to-hip ratio (WHR) between the control and VAAM groups. There was a significant (p<.05) difference in WHR between the VAAM group and the control group before the experiment. However, there were no significant differences between the two groups in other measurements measured either before or after the experiment. In conclusion, the body composition of the aerobic dancers was not influenced by the consumption of a VAAM sports nutritional drink.