Stretching is undeniably an important element in karate training.
- decrease the risk of injuring your muscles / tendons
- reduce muscle tension / soreness
- develop awareness of your body
- facilitate movements and achieving impact
- improve overall physical fitness
The general warm-up should begin with joint-rotations like what we will do during the first 10 minutes into the training. Starting from your toes and working your way up. This facilitates joint motion by lubricating the entire joint with synovial fluid. Such lubrication permits your joints to function more easily.
Proper breathing control is important for a successful stretch. Proper breathing helps to relax the body, increases blood flow throughout the body, and helps to mechanically remove lactic acid and other by-products of exercise.
You should be taking slow, relaxed breaths when you stretch, trying to exhale as the muscle is stretching.
The proper way to breathe is to inhale slowly through the nose, expanding the abdomen (not the chest); hold the breath a moment; then exhale slowly through the mouth. Inhaling through the nose has several purposes including cleaning the air and insuring proper temperature and humidity for oxygen transfer into the lungs.