The campaign, which will run across the chain’s gym estate and on owned channels, aims to broaden the definition of strength beyond aesthetics, weights and personal bests, celebrating the everyday physical and mental gains that come from getting stronger.

Alongside supporting muscle strength, research indicates clear benefits of strength training which go beyond visible gains. Consistent resistance training has been associated with a 15% increase in bone density and when combined with cardio, studies have found that strength training supports a 40% drop in mortality risk.

However, there remains a clear gap between the benefits of strength training and participation. According to a 2026 report from ukactive and Les Mills, around one in three (32%) UK adults do no strength training exercise whatsoever, while nearly half (43%) aren't meeting the chief medical officer's guidelines of two or more strength-based activities a week.

Rather than access to gyms or equipment, some of the biggest barriers to consumers taking up strength training are rooted in perceptions, including not knowing where to start and misconceptions that strength training is not suited to them.

With The Real Flex, Fitness First wants to help break down those barriers by showing that strength training can be for everyone – and that its benefits extend far beyond how much someone can lift or how their body looks. Whether it’s lifting a new PB, feeling more comfortable in your body or simply moving through everyday life with greater ease, The Real Flex recognises one simple truth: every gain matters.

The campaign builds on Fitness First’s wider focus on helping people understand and improve their overall wellbeing. Earlier this year, the brand launched Discover Your BioAge, a science-based assessment designed to give members a clearer indication of their biological age across measures including strength, cardio, flexibility and metabolism.

Lee Pinnington, marketing director of Fitness First, said: 'Strength training has one of the most powerful evidence bases in fitness - and yet it's still one of the most misunderstood. Too many people have written it off before they've even started, because the image of what strength training looks like doesn't reflect the reality of what it actually delivers.'

'The Real Flex is our way of changing that conversation. Because whether you're tracking a BioAge score, hitting a new PB, moving without pain for the first time in years or simply showing up consistently - that's a flex worth celebrating. Every single one of them counts.'