Racket sports such as pickleball—often referred to as America's fastest-growing sport—are clearly having a moment. New pickleball partnerships, leagues and playing courts are springing up everywhere.

Racket sports like tennis and racquetball appear to accelerate knee joint degeneration in overweight people with osteoarthritis, according to a new study. Racket sports like tennis and racquetball ...

It may, initially, seem like a spin-off of pickleball, but they have more differences than similarities.