Have you ever wanted your fingers to move as fast as a professional athlete runs? Meet Carl Czerny, the man who became the world’s most famous "piano personal trainer." Long before there were apps or videos, Czerny was teaching people how to make their fingers strong, fast, and ready for anything.

If you have ever taken piano lessons, chances are you have encountered the name Carl Czerny (pronounced Churn-ee). His books of exercises are sitting on piano racks all over the world right now.

The Classical era (roughly 1750-1820) witnessed a pivotal transformation in the world of music, and at its heart was the burgeoning popularity of the piano. While earlier keyboard instruments like the harpsichord and clavichord had their place, the piano's ability to produce a wide range of dynamics – from soft (piano) to loud (forte) – gave composers unprecedented expressive possibilities