A rowing ergometer is a fitness machine designed to simulate the action of rowing a boat. It consists of a sliding seat, footrests, and a handle that users pull to mimic the rowing motion. This equipment is commonly used for training by both recreational rowers and competitive athletes, as it provides a full-body workout. Rowing ergometers measure performance metrics such as distance, time, and power output, allowing users to track their progress. They are often found in gyms and rowing clubs, and they can be adjusted for resistance to accommodate different fitness levels and training goals.