Boutique fitness behemoth Xponential Fitness has added boxing studio operator Rumble to its ever-growing portfolio of brands.

Rumble delivers 45-minute, 10-round, full-body strength and conditioning workouts crafted around specially designed water-filled, teardrop-style boxing bags.

The company was founded by four fitness entrepreneurs: Noah Neiman, Eugene Remm, Andy Stenzler and Anthony DiMarco. It opened its first site in New York City in 2017 and has since expanded into Los Angeles, Washington DC, Philadelphia, Palo Alto, and San Francisco, with a Chicago location coming soon.

Following the acquisition, Xponential Fitness said it will work quickly to start franchising the concept, leveraging its seasoned team with decades of fitness and franchising expertise.

Rumble has attracted a number of celebrity exercisers, from Justin Bieber and Selena Gomez to Kendall Jenner and David Beckham.

Anthony Geisler, CEO of Xponential Fitness, said: “With its premium boxing experience, virtual workout platform and celebrity reach, Rumble is a fantastic fit for our lineup of boutique fitness brands.

“By adding Rumble to the Xponential portfolio, we’re opening up another core modality for our members to help them reach their health and fitness goals within our family of brands, as well as creating opportunity for entrepreneurs to bring this engaging workout to their market.”

Rumble is the ninth brand in Xponential's family of franchised fitness brands, joining Pure Barre, Club Pilates, CycleBar, YogaSix, StretchLab, Row House, AKT, and STRIDE.

In February, Rumble launched Rumble TV, a live and on-demand workout platform, offering a collection of boxing, HIIT, strength, and running workouts.

Ashley Camerini, CEO of Rumble, said: “We are looking forward to seeing Rumble grow with such an incredible industry leader.”

Xponential Fitness is backed by Anthony Geisler and Snapdragon Capital Partners and has grown rapidly in recent years.

It opened 394 new locations in 2019 and another 240 during the pandemic-hit 2020.

It recently launched five of its brands in the emerging Saudi Arabian market, including Club Pilates, Pure Barre, AKT, YogaSix, and CycleBar.