Those individuals who are regular exercisers should strive for an intensity level of ________ percent of their target heart-rate reserve.

A) 30-45
B) 40-55
C) 65-80
D) 84-94

Regular exercisers should strive for an intensity level of 65-80% of their target heart-rate reserve in order to achieve maximum benefits from their workouts. This level of intensity is considered moderate to vigorous and has been shown to improve cardiovascular health, endurance, and weight management.