It is hard to imagine that this modern, gleaming gym was once home to legendary music venue Fibbers.

Where people used to get hot and sweaty on the dance floor, they will now do the same in spin classes or circuit sessions.


Fibbers’ old home in Stonebow House has been transformed into Supersonic Fitness, described as “a new wellbeing concept for York”.

The venue offers a full range of premium gym equipment alongside studio space for classes, a state-of-the-art spa recovery zone and a healthy eating café.

‘More than a gym’

Supersonic has been created by Nick Sadler and Sarah Cleland-Smith, who are both based in York. Nick said:

  • We’ve created Supersonic to be more than just a gym; it’s a sanctuary ready to welcome you with open arms and support your personal goals for total lifestyle transformation.

    The space has been designed to make you feel good and help you to lead a healthier lifestyle – whether that’s working out, practicing mindfulness, aiding recovery, meeting friends or nourishing yourself with great food.

The exterior of Supersonic in Stonebow House


There’s a lot of top gym equipment

Keep healthy and build muscle

The gym has a full range of high-quality equipment and there are studio classes, cardio and bespoke Super60 fitness classes on offer.

To chill out, there is yoga and meditation for mental and spiritual relaxation, amid living plant walls.

Supersonic also offers injury rehab and return-to-fitness support and a recovery zone with infrared and ice recovery.

Plus there’s is bright and modern café with low-level seating and at-bar dining. It serves fresh and organic meals, snacks and drinks, with a focus on local produce.

Passion project

The development of Supersonic has been a passion project for Nick and Sarah.

Nick left Yorkshire at 19 to work in America and started a gym design and installation company in 2000, but it had always been an ambition to move back to Yorkshire and develop something different.

The pair have teamed with partner Jenny Beasley to create Supersonic.

They have 20 years’ experience in the sector, and jumped at the chance to do a project in an iconic building within York’s city walls.

Membership details

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Solo artist: £78 per month
Groove: £88 per month
Indie: £99 per month
Rockstar: £128 per month

Studio sessions: £18 for 3 classes
Supergroup: £100 for 10 classes