effects of eight-week high-intensity interval training on aerobic performance, lipid profile, and hematological indices in overweight adolescents

Background: research on the effects of interval training on lipid profile and hematological indices is limited. objectives: therefore, the purpose of this study was to determine the effects of eight weeks of high-intensity interval training (hiit) and moderate-intensity continuous training (mict) on aerobic performance, body composition, lipid profile, and hematological indices in overweight adolescents. methods: thirty overweight boys (13 - 16 years) participated in this study and were randomly divided into three groups, including the control (n = 10), hiit (n = 10), and mict (n = 10) groups. hiit training (4  4-minute) was performed with an intensity of 95 - 85% of maximum heart rate, and mict training (35-minute) was performed with an intensity of 70 - 60% of maximum heart rate, three sessions per week for eight weeks. beep test and elisa technique were used to measure aerobic performance, lipid profile, and hematological indices, respectively. the two-way repeated-measuresanovawasused to determine the differences with a confidence interval of 95% ( = 0.05). results: the results showed that except for the variables of glucose, triglyceride (tg), and low-density lipoprotein (ldl), all other variables in the hiit group had a significant change compared to the pre-test (p < 0.05). also, the results showed that there was a significant difference between the hiit and control groups in fat percentage, vo2max, high-density lipoprotein (hdl), iron, and hemoglobin value (p < 0.05). conclusions: the results suggest that hiit training can be as effective as continuous strategy training to reduce the risk factors associated with cardiovascular disease in overweight adolescents.