Why do an interval workout?

Why do an interval workout? 
If you’re stuck in a workout rut, intervals can be a new and interesting way to get motivated and in shape. You’ll strengthen your heart, and future workouts will feel easier. Like any workout, it will help burn fat and calories, while also building endurance.

Plus, with interval training the possibilities are endless! No matter what mode of exercise you choose (treadmill, outdoor walking or running, swimming, elliptical, cycling), every workout can be different and the variety within each session keeps things fresh and fun. If you are sick of walking on the treadmill for an hour each day, adding intervals can jumpstart your body out of its low-intensity cardio rut.