Rapid ball or rapid-ball is a relatively new sport derived from squash

Squash (sport)

Squash is a high-speed racquet sport played by two players in a four-walled court with a small, hollow rubber ball...

 and raquetball. It was invented by Peter V. Haighton in order to create a game similar to squash, but less taxing on one's legs and joints. It is played by two players on a standard squash court, using a racquetball equipment, including a ball that rebounds much farther than the comparatively "dead" ball used in squash, thus requiring less running.