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How to do center splits
Do a butterfly stretch.
The butterfly stretch is a great stretch for the center splits as it increases flexibility in the inner thighs, the groin and the hips. To perform :
Sit on the floor and bend your knees until the soles of your feet are touching.
Pull your heels as close towards your body as possible and use your elbows to push your knees towards the floor. Make sure to sit upright with your back straight.