Gym habits: Why Gen Z is ditching the treadmill for heavy weights

The shift to strength

If your gym routine used to be all about endless miles on the treadmill, you’re definitely not alone—but the vibes are changing. Across the UK, young adults are swapping steady-state cardio for iron, favoring barbells, kettlebells, and machines that help build muscle. It’s giving functional fitness, and honestly, the science is here for it.

Antonia Duffin, a personal trainer who runs a women's gym in Manchester, notes that younger clients are highkey obsessed with the long-term benefits of lifting, like preventing osteoporosis. Research backs this up, suggesting that just two hours of strength training a week can boost your mood, strengthen your bones, and even help protect your brain health. Real talk: it’s a total W for your future self.

Why the pivot?

So, what’s driving the change? It’s a mix of social media inspiration and a desire for faster results. Dr. Andrew Scott from the University of Portsmouth notes that platforms like TikTok and Instagram make fitness feel accessible—when you see people like you hitting PRs, you start thinking, 'I can do that too.'

For 19-year-old student Will Seward, moving from running machines to explosive weight training has been a game-changer for his daily life. 'It's had a real impact on my day to day life,' he says, 'improving my mood and making me feel generally healthier.'

The social component

It’s not just about the physical gains; it’s about the community. Even as traditional cardio declines, social activities like parkruns are thriving, giving people a chance to connect—something that’s become super important in a post-remote-work world. Dr. Hussain Al-Zubaidi, a GP and triathlete, points out that the success of modern fitness culture comes down to it being 'fun and sociable.'

Is it worth the bag?

Despite the cost-of-living crunch, Gen Z is still prioritizing their health. Data shows that over a quarter of 16-34 year olds now view gym memberships as a top spending priority, sometimes even over eating out. For 27-year-old event manager Cordelia Sheridan, her £45 membership is an essential utility bill. 'I want to go into my 30s being strong,' she says, and honestly? We love that energy. Say less.

Why it matters

Swapping mindless cardio for deliberate strength training is a major shift that prioritizes long-term health over just burning calories. By viewing the gym as a social hub and an investment in their future selves, Gen Z is rewriting the rules on what it means to 'stay fit.'