Low-intensity workout that got Margot Robbie Barbie Ready both mentally and physically ok.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ok.co.uk Daily Mail and Mail on Sunday newspapers.
We put the likes of triyoga, GYMBOX, Barry's Bootcamp and JOHN REED on trial, whilst looking for the best gyms and best fitness classes in London. It's time to