There are little tricks you can use to make your cardio workouts a little more heart-pounding. For example, if you like to run or jog, try doing so on a surface other than concrete. Loosely packed dirt, sand, or water will provide lots of resistance, making your body work harder than ever. Jogging through water can burn up to 17 calories a minute!
You can also add resistance by wearing wrist and ankle weights. They make it just a bit harder to lift your arms and legs, which means more calories burned during your workout.