The Flatline Workout – The Toughest New Exercise Class On Earth?

Everyone is talking about the Flatline workout, but what is it? Would we recommend it? Here's everything you need to know... The Flatline workout is here, and it sounds pretty terrifying.
London gym chain Gymbox has opened a brand new set of (sweaty) doors in Farringdon, North London. To promote the new exercise spot, they’ve created what some are calling ‘the toughest exercise class on Earth’ – and it’s exclusive to the venue. It’s called the Flatline workout