Re: Exercises to keep breathing?
Slow down your training and focus on your breathing. Make the coordination of your breathing and motion essential to the technique......which it is. When you are comfortable and successful at one speed, pick up the pass a tiny bit. At first this will seem boring but in a few short months, if done correctly, you will begin to learn to move and breathe together.
Outside of the dojo also work on coordinating your breathing and movement. When you get up from a chair or get out of bed do you hold your breath? When you walk across a parking lot is your breathing coordinated with your motion? When you bend to lift up a box, how are you breathing? Is it coordinated with your motion? Breathing is extremely related to relaxation, hence by learning to move and breathe you will also be learning to relax. Enjoy.