The reformer machine is the cheapest on the market but experts have raised concerns about it Everyone is talking about reformer Pilates and with the likes of LeBron James, Hailey Bieber and even Ed Sheeran opting for a spin on the carriage to keep fit, the workout style has become wildly popular. But keeping up with the fastest-growing fitness trends can come at a cost. Studio classes don’t come cheap and investing in an at-home reformer machine can easily set you back more than £500. That’s