A crosstrainer/elliptical is a multifunctional piece of fitness equipment to use for cardio training. Crosstrainers/ellipticals are equipped with a flywheel with two gangplanks attached to it. You yourself get those gangplanks in motion by walking forwards or backwards. A crosstrainer/elliptical has handle bars you can grab during your workout so both your arms and legs are in motion. This way your whole body is in motion and you train nearly all your muscles.
The training motion resembles Cross-country skiing and stimulates your heart and lung functioning. That's why crosstrainers are perfectly suitable to train your overall level of fitness. Your training motion is elliptical which means it isn't straining to your joints and save to do. A crosstrainer/elliptical is the ideal piece of fitness equipment to athletes who's goal is to burn fat and slim down, improve their fitness level and strengthen their muscles.