Which of the following is NOT a benefit seen in the cardiovascular system with exercise?

The increase in resting heart rate is not a benefit associated with exercise. In fact, regular cardiovascular exercise typically leads to a decrease in resting heart rate over time. This occurs because exercise strengthens the heart muscles, allowing the heart to pump more blood with each beat, resulting in fewer beats required at rest.

Reduction in blood pressure is a recognized benefit of regular exercise, particularly for individuals with hypertension. Exercise can improve vascular function and vessel elasticity, leading to lower blood pressure levels.

Improvement in circulation efficiency also results from regular physical activity. Exercise enhances the ability of the cardiovascular system to deliver oxygen and nutrients to tissues while removing waste products more effectively.

Similarly, a decrease in resting heart rate signifies improved cardiac efficiency and is generally observed in individuals who consistently engage in aerobic exercise. Thus, the only choice that does not align with benefits commonly attributed to exercise in the cardiovascular system is the increase in resting heart rate.