Put your imagination and your tummy muscles to the test.

Lie with your back on the floor close enough to the wall to put your legs up. Put your feet flat against the wall slightly higher than your knees.

Then Imagining that you're holding a rope right in front of you, level with your knees, breathe in and pull yourself up with the imaginary rope. Curl up as far as you can without letting your lower back leave the floor.

Return to the starting position and do 4 reps. Slowly build up to doing 8–16 reps.

Nicki's tip: Tuck your chin in, your head forward and haul yourself towards a terrific tum.