IRCT20120702010158N6 IRCT 2019-05-04 Islamic Azad University Effect of continuous and interval training on ECG Comparison of the effect of continuous and interval aerobic training on ECG of active young girls 2017-12-22 anticipated 32 Complete https://irct.ir/trial/35066 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Education/Guidance, Randomization description: An replacement randomization method is used. First, a simple randomization method (random number table) is used first, and the randomization program is repeated as long as the desired equilibrium is achieved (that is, 10 people in each group). N/A Being physically active. Intervention 1: Intervention group: Continuous aerobic training, the protocol of the trainings (eight weeks, three sessions per week) included 20-35 minutes of running per session, with an intensity of 60-75% of the maximum heart rate. Intervention 2: Intervention group: Interval aerobic training, the protocol of the trainings (eight weeks, three sessions per week) included 20-35 minutes of running per session, with an intensity of 60-75% of the maximum heart rate. Intervention 3: Control group: No exercise training. No - There is not a plan to make this available Justification or reason for not sharing IPD is Participants are studied as a sample.