How To Grow Taller Overnight - Exercising Is Important To Enhance Your Height Growth Naturally! While stretching and exercising is important to grow taller overnight, it is not enough. You need to have strong muscles from the legs all the way up your back to your shoulders. To exercise, you can start by walking briskly and jogging and then you can add more intense exercises as per your ability. Start intense weight training exercises as soon as you can to stimulate your growth hormones in your body.