Ergometers are devices used to measure work output during physical exercise. They are commonly found in fitness centers and rehabilitation facilities, allowing users to perform activities like cycling or rowing while tracking their performance. The data collected can include metrics such as distance, speed, and calories burned, helping individuals monitor their fitness progress. These machines come in various forms, including stationary bikes and rowing machines. They are designed to provide a controlled environment for exercise, making it easier to assess an individual's physical capabilities and tailor workout programs accordingly. Ergometry is often used in clinical settings to evaluate cardiovascular health and endurance.