This study aimed to explore the impact of integrating a Hot Circle Electrical Muscle Stimulation (EMS) massage belt (SPCARE Inc., South Korea) into abdominal muscle strengthening exercises among young women, focusing on body composition, metabolic rate, and abdominal muscle fatigue. Twenty-two healthy female participants were randomly assigned to either the EMS massage belt group or the placebo group. Both groups followed a four-week regimen of five abdominal exercises three times a week. Various outcome measures, including body composition indicators (body fat, weight, body mass index, waist circumference), muscle fatigue, muscle temperature, respiratory exchange rate, metabolic rate, and heart rate, were assessed. Data analysis employed the Wilcoxon-signed-rank test for within-group changes over time and the Mann–Whitney U-test for between-group comparisons. Results demonstrated significant reductions in body fat, body mass index, and waist circumference, alongside increases in resting metabolic rate, respiratory exchange rate, muscle fatigue threshold, and muscle temperature (p<0.05). Comparable changes occurred in the placebo group, though not in waist circumference, muscle fatigue, and muscle temperature (p>0.05). Furthermore, when comparing the EMS group to the placebo group, the former exhibited noteworthy reductions in waist circumference and increases in muscle fatigue threshold and muscle temperature (p<0.05). In conclusion, integrating an EMS massage belt with abdominal exercises proved beneficial, showing reduced body fat and enhanced metabolic markers. This study supports recommending the use of an EMS massage belt as part of a comprehensive strategy to optimize abdominal muscle strengthening exercises