Of variance (group x time) was used to evaluate the effects of training on all traditional cmd risk parameters. effect sizes (es) were calculated to assess the magnitude of difference. results mict, hiit and hiit + mict significantly improved resting heart rate (es = -0.39; es = -1.05; es = -1.05; p> 0.0001), fasting glucose (es = -0.63; es = -0.90; es = -0.13; p = 0.0004), peak oxygen consumption (es= 0.53; es= 0.88; es =0.46; p >0.0001) and c-reactive protein (es = -0.18; es = -1.04; es = -0.54; p =0.0016), respectively. the hiit + mict group significantly reducedwaist circumference(-5.37%; p> 0.0001) and waist-to- hip ratio (-2.47%; p> 0.0002) compared with the mict (6.99%; 6.33%) and hiit (-0.50%; -1.27%) groups, respectively. conclusion the findings from this study indicate that short-term hiit and mict interventions are both effective for improving cardio- metabolic health in children. hiit + mict may provide