An all-around healthy diet is best for any exercise routine, but cardiovascular exercise requires a balance of special nutrients. If you get cardiovascular exercise regularly, here's how to fuel up.
Cardio exercises like walking, running and biking require energy from both carbohydrates and fat. Carbohydrates are the body's No. 1 go-to source, but healthy sources of fat also give ample doses of energy.
As exercise intensity changes, the body switches back and forth between carbs and fat to provide energy. Since you can't completely control how and when the body needs what nutrient, it's best to have adequate amounts of both as a regular part of the diet.