You should also maintain proper body alignment and positioning particularly on the knees in order to prevent any sort of straining and injury. You are given the chance to manipulate the level of your workout by adjusting the resistance and speed. This feature is present on the various types of the stair climber. Stair mills or step mills are usually described as escalators coming from hell . They are used as if you are stepping up local stadium steps. However, such steps may seem never ending. Step mills are more recommended to beginners. Even at lower settings, the machines could make the heart beat much faster. Consider your health background - If you had injuries before never try stair climbers. If you have bad back stay away from rowers and cross-country ski machines. Do not buy exercise equipment that will only complicate your previous injuries. 6. Look for safety features - Consider buying cardio exercise equipment with safety features especially if you have kids at home. To use the tool, lie down flat to the floor. Keep your feet along the groves of the machines or at the footrest. You may adjust the speed and at the same time set the timer. In no time, the footrest would swing back and then forth to carry your feet in identical motions. The movement should be carried throughout the body. If you want to adjust the intensity of your workout, you may pedal faster, raise the incline, and increase the resistance or any combination of machine's features. 3. Stationary Bikes - This cardio exercise equipment is especially designed for cycling which is considered by many fitness experts as the safest cross-training activity. Take note of the impact brought about by such machines. If you have lower back problems, it is definitely not a good idea to choose a stationary bicycle over a treadmill. Always bear in mind that in choosing and buying the tools, it should not be about the cardio exercise machine. Prioritize the relationship between your body and the equipment.