In these busy times, you need a workout that does it all, and does it quickly. Look no further, because we've got one for you. This 20-minute workout will raise your heart rate to burn serious calories while toning and strengthening your entire body. Remember, building muscle helps keep your metabolism firing on all cylinders — and that's exactly what you want. Grab a set of medium dumbbells and get ready to work! If you're new to this whole fitness thing, don't worry. We offer modifications throughout the video in case you need them.