planktoetap2

Step two

Alternating legs, you are going to slowly take your left leg from the centre and tap it out wide to the side then bring it back to the centre. Repeat with the right leg.

Aim to keep the hips completely still and in line with your shoulders. Try not to hold your hands together as this uses your chest and you want to strengthen your core.

Hold the plank on your knees or toes without the toe tap for the duration of the 50 seconds.

Workout: Sarah Lawrence, FitCulture

Photography: Helen Maree Photography