A 12-yeаr-оld bоy presents fоr а routine heаlth maintenance visit. His BMI is at the 97th percentile. Blood pressure measurements obtained on three separate visits over the past month were 128/82 mmHg, 130/80 mmHg, and 129/84 mmHg. He is asymptomatic, and his history, physical examination, and initial laboratory evaluation are unremarkable. What is the most appropriate initial management for this patient?