NEED TO KNOW…

1 | Perform each move for 40 secs, resting for 20 secs before moving on to the next. Complete the circuit four times, resting for 1 to 2 mins between rounds.

2 | It’s safe to do this workout twice a week, but avoid doing it on consecutive days. ‘I’d suggest including some upper-body and full-body days, too,’ says Grubb.

3 | You can do this workout with or without weights. ‘I’ve used a dumbbell in the session, which you can easily replace with something from your home, like a backpack full of books,’ says Grubb, who adds that you’ll still work your muscles if you choose not to add weight.