Continuum's fees put it well clear of gyms singled out as the most expensive in the world, like The Wellness Sky a luxury gym in the Serbian capital Belgrade, where a membership is $30,000 per year.

It’s close to 10am on my day as a guinea pig at one of the world’s most expensive gyms and I’m lying in a hospital gown on top of a futuristic-looking gurney with a robotic arm looming above me.