Exercise machine, equipped with an apparatus for measuring the work performed by exercisingIndoor rower, called an ergometer by rowersAn instrument for measuring the amount of work done by human muscles
Ergometer comes from the Greek words ergon (ἔργον), meaning work, and metron (μέτρον), meaning measure. "Ergometer", therefore, literally means "work measurer". A bike, fitted with mechanical work measurement devices is also an ergometer.