Individuals should participate in activities to improve cardiovascular fitness.

Individuals should participate in activities that involve moderate or any kind of exercise to improve cardiovascular fitness. Some of the best exercises that one can do to improve one's heart health are these:

1. Brisk Walking- An individual should at least walk a certain distance to generally improve his well being. You can do this by walking outside or using a treadmill.

2. Running- If you want to reach another level of exercise, you can start running a certain distance every day. This will certainly burn some of those calories and increase your heat’s wellness.

3. Swimming- If you have joint problems and walking or running is a pain, you can settle for the pool. This will not only boost your heart rate, but this will also improve your muscles.

What you should re write your question it doesn’t make sense

Iwould say a is correct