The video, with a hard rock soundtrack, opens with two people discussing their working day.

The 45-minute circuit-style class puts you through five obstacles and five bodyweight conditioning exercises, all set to a rock soundtrack.

Egged on by a full-on rock soundtrack, you must thrash your way through dockyards or mountain tracks, smacking computer-controlled opponents aside and battering any trees and buildings in your path.

Peerless indie rock soundtrack, too.

And all to a heavy rock soundtrack.