Orangetheory Fitness recorded more than US$1bn (€875m, £765m) in system-wide revenues during 2018 – a record for the franchise-based operator.

The company – which offers 60-minute HIIT sessions featuring five different exercise zones – has grown rapidly since its launch in 2010 and currently has 1,100 studios in 22 countries. It also has more than 500 studios in the development pipeline.

"By taking HIIT to a new level of performance, we have been able to take our business to new heights as well," said Dave Long, Orangetheory Fitness co-founder and CEO.

"As our growth rate continues to skyrocket, we believe we will reach our aggressive goal of operating 2,500 studios – serving 2.5 million members, worldwide – within the next five years.”

The company has ambitious growth plans for the UK market and has signed two master franchising deals for a total of 110 franchised sites, covering all of England.

It opened its first site under the new master deal in the North of England in December 2018 – a 5,500sq ft studio in Altrincham – which will be followed by a studio in Derby, scheduled to open later this year.

The group plans to have 12 sites operating in the UK by the end of 2019.