In an empty park overshadowed by Hong Kong’s cramped apartment blocks, personal trainer Kristen Handford presses record on her phone and begins a workout for clients trying to stay fit at home during the coronavirus pandemic.

“Alright guys, we’ll get started with just a 10 minute body workout that you can do at home in a small space,” she says at the start of a video which will later be sent to clients.

It is a scene now being repeated around the globe.

More than 3.4 billion people have been called on or forced by authorities to stay at home, around 44 percent of the world population, according to a count based on an AFP database.