HOW IT’S DONE

Pick two of these 15-minute circuits to form a 30-minute workout that targets the bits of your body you want to put a fitness filter on. For each workout, do three one-minute sets per move with a 30-second rest after each set. You’ll need two adjustable-weight dumbbells (go as heavy as you can) – try the Women’s Health 10kg Dumbbell 2 Pack (£91.99, argos.co.uk) – a bench, a Swiss ball and a yoga strap.