Your new client is a 42 year old male who is a stock broker. His health history revealed the following: total cholesterol 185 mg/dL (4.7 mmol/L), HDL 32 mg/dL (0.8 mmol/L), LDL 110 mg/dL (2.8 mmol/L), resting blood pressure 138/80 mm Hg, waist circumference 98 centimeters. Based on the client's initial risk classification, what is the most appropriate suggestion for the client regarding his exercise program?