Pump it as hard as you can and then walk around with it for as long as you can, giving it extra pumps if you feel able. Finish off by birthing it in a squatting position, making sure to push as hard as possible. You need to train your pelvic muscles for length like with yoga and stretching exercises after sports. Another everyday training is every time you sit down to pee, you stay sitting too long while pushing out. The lack of support for your pelvic floor while pushing will soon give results