You can't jump when you start training. The main thing is that the front foot is not good enough to take off. To jump high, start practice, the front foot pressure down, so the board can not play
Jump when the two foot jump together, is the main force in the front foot down, immediately jumped to the front and rear points quickly away.
When jumping up, the front foot, the thigh belt forward, while the front foot, leg forward swing, should pay attention to swing, the calf is not always perpendicular to the ground. You can't just lean on your thighs, you can't jump high. When you jump up, you should use your hands up and down, so you can jump more steadily. Take a look at this video and notice what I say.
