A cycle ergometer is a stationary exercise bike designed to measure the power output of the user while pedaling. It is commonly used in fitness testing and rehabilitation settings, allowing individuals to perform controlled cardiovascular workouts. The device typically features adjustable resistance levels, enabling users to tailor their exercise intensity. These machines are often utilized in clinical environments to assess cardiovascular fitness and endurance. By providing accurate data on performance metrics, such as heart rate and energy expenditure, a cycle ergometer helps trainers and healthcare professionals monitor progress and develop personalized exercise programs for patients or athletes.