Marc Diaper CEO Fitness First UK
CEO

Fitness First UK

Marc Diaper

With 25 years industry experience Marc has worked his way from Personal Trainer and Sports Therapist to his current position as CEO of Fitness First UK where he leads business strategy with a major focus on people, brand and marketing. 

Prior to Fitness First, Marc spent 15 years at London’s disruptive fitness brand, Gymbox, where he held positions of Sales and Marketing Director, Managing Director and CEO. He successfully lead the sale of the business in November 2024. Marc has an entrepreneurial drive and believes all businesses must focus on brand standards and consistency whilst continually evolving their offering to stay relevant. He has a real passion for team progression and development and currently employs over 350 with an additional 600 personal trainers and group fitness instructors working on a freelance basis.

Marc is also a speaker at Beyond Activ Europe in Madrid, Spain.