Summarize this article:

In addition to changing your diet, you'll need to add cardiovascular exercise. Cardio exercises are ones that get your heart rate up, which boosts your metabolism and burns fat. Exercises like jogging or running, swimming, biking, or using a rowing machine are great ways to start if you haven’t done much cardio training before. When choosing your exercises, aim to pick activities that are moderate-intensity for you.  You'll need to be out of breath, sweating and have your heart rate raised. HIIT is a great method for maximizing the amount of fat you burn in a single workout session. When you do HIIT, you’ll want to get your heart rate as high as it can go for a short period of time, take a break, and then get your heart rate back up again. Make 1-2 of your cardio sessions in a week a HIIT workout.  The combination of HIIT and steady-state cardio (like jogging for 30 minutes) is great for weight loss. In addition to participating in planned, structured exercise, try increasing how much you move throughout the day.  This can also help your overall calorie burn throughout the day.  Take the stairs instead of the elevator whenever you can. When you go to the store or run an errand, park far away from the building and get in a short walk. If you have a one-on-one meeting at work, see if the other person would be okay with taking a walk as you talk. Bring your lunch to work and then walk to a nearby spot to eat it. Do quick exercises, like crunches, jumping jacks, or lunges, during commercial breaks as you watch TV. If you notice that you aren't losing weight or have plateaued, you might need to make your workouts longer or harder. As your body begins to get used to working out, it also makes exercising more efficient, which burns fewer calories. To fix this, increase the length of time you spend doing cardio exercises or do them at a faster pace for the same amount of time. For example, if you usually spend 20 minutes running each day, try going for 5 or 10 minutes longer each time. Or you can run at a faster pace for the same amount of time.

Summary:
Get in approximately 30 minutes of aerobic exercise a day. Add in high-intensity interval training (HIIT) to your exercise routine. Move more throughout the day. Increase the intensity of your workouts over time.