The goal of this study is to compare two types of exercises, isometric exercise (like squats and planks) and aerobic exercise (such as running), to see which one is more effective at improving blood pressure in teenagers aged 13 to 17.5 years. The main question the study aims to answer is: \- Do the effects of one session of isometric exercise on the blood pressure of adolescents compare to the effects of one session of aerobic exercise? Adolescents with overweight or obesity may qualify for this study. Participants will be randomly assigned to either a single session of isometric exercise or a single session of aerobic exercise. * Participants will attend 3 study visits in total. * Study visits should be completed within 4 weeks of enrollment. * At the initial visit, samples (example: blood) will be collected and body measurements will be taken. * Participants will be asked to answer questionnaires (diet, growth, and others) * At visit 2, participants will have their blood pressure measured using a 24 hour blood pressure monitor. * At visit 3, participants will participate in a single session of either aerobic or isometric exercise. They will wear a 24-hour blood pressure monitor immediately after the exercise session.