When it comes to keeping your heart healthy, few activities will benefit you more than regular cardiovascular exercise. Many people start simply, walking a few laps around the block, then build up as they continue to progress and their heart and lungs become stronger -- along with the rest of their body.When you become ready for the next challenge, one great option is to incorporate a Stairmaster routine into your fitness plan.What is a Stairmaster?Stairmaster is a brand of stair-climbing workout equipment. It simulates walking up stairs continuously, providing resistance to help train muscles and a rhythm that fits into an aerobic workout.Why Stairmaster?The Stairmaster is easy to use. It doesn't take any specific knowledge to hop on the machine and get going.The machine can be adjusted to suit nearly any fitness level. Someone who is brand new to exercise may have a bit of a challenge and only be able to do a few minutes at a time, but by adjusting the speed and resistance of the machine, it can be suitable for anyone, from beginner to advanced.Depending on your weight and the speed and resistance settings you choose, a Stairmaster can help you burn, on average, about 250 calories per 30 minute session.For people who have trouble with their joints, a Stairmaster is a great option. Your feet stay planted on the pedals, allowing for a no-impact workout. You can exercise your joints safely, without risking injury.In addition to providing a great cardiovascular workout, the Stairmaster helps develop strength and tone the muscles in the lower body, particularly in the gluts and the quads. Want slim, trim legs? A Stairmaster can help you accomplish this.A Stairmaster can fit comfortably in a medium-sized living room or bedroom, allowing you to work out in the comfort of your home.For Best ResultsFor the best cardiovascular results, plan to workout with the Stairmaster for at least 20 minutes, three to four times per week. Your goal is to get your heart rate up and keep it elevated for at least 15 minutes. When this becomes easy, increase your time and resistance to stay challenged.Before you start on a Stairmaster routine, check with your doctor to get approval. If you have had knee replacement or other surgery, the Stairmaster may not be a good choice for you.