How to do Crunches
1. Lay on your back on a soft workout surface with your fingertips placed lightly behind your ears, your feet planted on the floor allowing your knees to point upwards
2. As you exhale, contract your abdominal muscles to bring both your head and shoulders in towards the centre of your body
3. Aim to bring your shoulder slightly off the floor and lead with your chest, not with your head
4. Slowly relax your abdominal muscles and return to the starting position to complete one rep
What muscles do Crunches work?
The primary muscles used in Crunches are the Abs.