Fitness First is to invest a further £86m to complete the £220m refurbishment and rebranding project of its chain of 377 gyms.
The 220m revamp scheme is set to be completed by the end of this year, 12 months ahead of schedule. Revenue at the already revamped UK clubs has increased by 4% year-on-year.
The company, which was rescued from the brink of collapse in 2012, is also planning to hire 400 new staff and 250 personal trainers.