With over twenty years of leisure industry experience, Diaper has worked his way from being a PT and Sports Therapist to, most recently, CEO of Gymbox, a role which he held for eight years. During his 14-year tenure with Gymbox, he also held the roles of sales and marketing director and managing director, leading a disruptive fitness brand which helped to refine the gym experience underpinned by a powerful, member-led culture.

Having worked in numerous roles across the fitness industry Diaper brings a unique blend of in-depth industry understanding, a passion for people and creativity, and a track record of delivering innovation-led growth which will all support Fitness First’s future ambitions.

Scott Best, chairman at Fitness First said: 'We’re delighted to welcome Marc to Fitness First at such an important point in our long-term development. Marc is an exceptional leader with incredible energy and a proven track record of innovation and growth in the fitness industry. He has an exceptional entrepreneurial drive, with a real passion for team progression and development. He has a clear vision for growth and innovation at Fitness First and I’m confident he’ll propel the business into an exciting new era.'