move your body. –> Cardiovascular Exercise –> Cardiac Hypertrophy (Eccentric Loading)
improve your eating habits. –> this is dependent upon the person
Supplements –> if necessary
I guess the question comes down to what do you mean by “circulatory function?’ It’s a very nondescript question. Any kind of cardiovascular or strength overload will accelerate blood pressure and heart rate. Come back with a more clearly delineated question.
Movement on an incline if there are no contraindications.
I like my bootcampers carrying 8 lb medicine balls as a load factor
Sometimes I put a 10 lb weighted vest on and climb hills.
