• It’s one way to burn calories and help you lose weight
• It makes your heart strong so that it doesn’t have to work as hard to pump blood
• It increases your lung capacity
• It helps reduce risk of heart attack, high cholesterol, high blood pressure and diabetes
• It makes you feel good
• It helps you sleep better
• It helps reduce stress
• I could go on all day, but you get the point

Bottom line: you need cardio if you want to get your weight under control and get your stress to a tolerable level.