What is it? A sturdy, padded, stackable box or platform between 17 and 40 inches in height, on to which you jump.

How much does it cost? It’s quite the fad du jour, so you’re likely to find one at the local gym. Alternatively, if you have the space for what may eventually become a glorified beanbag, they cost about £100 each.

What does it promise? Leaping up on top of a box is a great explosive workout for your legs and core, and an unexpectedly punishing cardio workout.

What’s it actually like? When I’m doing circuits, I dread the plyo box. The few minutes spent leaping up on top of a 36-inch box and back down again – often while holding a medicine ball above my head, like some sort of sweaty trophy – is usually enough to make me fear that my lungs will explode and kill me. The box can be used for more than just this berserk lunging, too – it’s also a surprisingly flexible piece of home gym equipment. Add in lunges and burpees and planks and dips, and you’ve got a relatively comprehensive bodyweight workout. Plus, who doesn’t like jumping on stuff?

Best and worst bit As with most such things, the best bit invariably comes when you eventually manage to puff your way through a workout without having to stop for a breather. The worst part, obviously, is trying to walk down a flight of stairs the day after your first time.

Is it worth it? Despite being a fancy padded box, it’s a yes.