To improve cardiovascular fitness one should

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Walking at a brisk pace is the best option to improve cardiovascular fitness as it is a low-impact exercise that involves the large muscles in the body such as legs, hips, and core. It also increases heart rate, breathing rate, and oxygen intake, which improve the health of the heart and lungs. Lifting weights and working against resistance are beneficial for building strength and muscle mass, but they may not directly improve cardiovascular fitness. Improving muscle flexibility is important for overall health but it does not significantly impact cardiovascular fitness.

To Improve Cardiovascular Fitness One Should