First off, how old are you. You should not be training Sanchin until 16 or 17 years of age. Until then you should focus on coordinating your breathing with movement, make it smooth and flowing. I had the honor to train with Morio Higaonna Sensei on Sanchin and you truly need a highly knowledgeable sensei for correct training. Great exercises to prepare you for true karate training is do you jun bi undo and hojo undo on a regular basis. It will help you understand what Sanchin can do for you. Do not let anyone fool you either, Sanchin is the foundation for developing ttrue Karate power. Good Luck, Don