If you’ve ever wondered why Notting Hill residents glow with health and possess supermodel proportions, we think we’ve found the answer: they’re all regulars at Barretoned. Over the course of a 60 minute session, you’ll exhaust your limbs with a sequence of tough moves that take place at the barre and on the mat – even the so-called warm-up segment is a challenge. Class sizes are small, so there is nowhere to hide: your instructor will call you out on your half-arsed posture and form to make sure you’re getting the most from even the tiniest flex or pulse. The studio’s website claims that you’ll see changes in your body after eight sessions – and we’re inclined to believe the hype. Classes cost £28 each.