The KTR Outdoor Air Bike is a sturdy, weatherproof cardio machine that can provide a very intense full-body workout in any open-air fitness space. Made from a heavy-duty steel frame, corrosion-resistant finishes, and a large fan wheel, this air bike is designed to use air resistance to naturally increase the workout intensity—the more the user pedals and pushes the handles, the greater the resistance becomes. As a result, this dynamic system works the legs, core, arms, and shoulders, thus providing a complete cardiovascular and strength-conditioning program suitable for different fitness levels of users. Moreover, its dual-action handlebars allow the user to perform synchronized upper- and lower-body movements, while the wide, non-slip pedals and stable base provide safety and comfort even when the workout is vigorous. The KTR Outdoor Air Bike is therefore perfect for parks, outdoor gyms, school campuses, and community recreation areas, where it facilitates not only a difficult but also a convenient fitness program for those who want to build endurance, lose calories, and improve their cardiopulmonary fitness in general.