What are its benefits? Can anyone give some examples of simple exercises?

Here are the steps for the controlled breathing exercise:

1. Sit upright in a comfortable position. Focus on your present state and existence, this is often termed being "mindful".
2. Block out intrusive thoughts. You may close your eyes if you wish.
3. Pay attention to your breathing. Inhale slowly through the nose, taking several seconds.
4. Exhale through the mouth, trying to make the exhalation phase last twice as long as the inhalation.
5. Continue this mindful breathing for 3-5 minutes.

You can either do the exercise quickly in stressful moments or, if you like, you can increase the practice to 15-20 minutes per day as a form of meditation. With regular practice, you can train your body to relax in stressful situations using this exercise.

Sit quietly for several minutes, either cross-legged on the floor or on a chair. Be sure that your spine is erect yet supple. Your hands should be folded gently together in your lap or palms down on your knees. As you sit, sense your weight being supported by the earth and allow the whole sensation of your body to enter your awareness and come to life.

Now, simply follow your breathing as you inhale and exhale. It is through following our breathing through our sensation that we begin to open to the power of breath. During inhalation, sense the temperature and vibration of the air as it flows from the tip of your nose through your nasal passages, throat, and trachea on its way into your lungs. During exhalation, sense the air going up and out of your lungs through your trachea, throat, and nose.

After at least five minutes, rub your hands together several times, put them over your navel, and sense your belly. How does your breathing respond to the warmth and energy from your hands? As you continue to follow your breathing, can you sense your belly expanding as you inhale and flattening as you exhale, without losing your awareness of the air as it enters and leaves your lungs?

As you begin to observe more clearly these movements of your breathing, you may start to experience a sense of energy deep in your belly, at the level of about an inch or two below your navel. During inhalation, you may feel this energy filling your entire belly. During exhalation, you may feel the energy becoming more compact and concentrated. Really let yourself experience this expanding and contracting sense of energy in your belly as your breathing continues.

Continue working in this way with your breathing for another five minutes or more. When you're almost ready to stop, give yourself a couple of minutes to sense the energy, or at least some of the energy, being absorbed into the cells of your belly and back toward your spine. Then bring your attention back to the whole sensation of yourself just sitting there, breathing. Watch, sense, and feel everything that's taking place, including your breathing, until you are ready to stop. See if you can sense yourself as a breathing being.

Deep breathing has been shown to lower blood pressure, ease tension and stress, releases endorphins into the body and strengthens weak abdominal and intestinal muscles

To ease tension and give your health and energy a boost, begin by sitting or lying comfortably. Breathe in slowly and deeply through your nose, counting to six. Hold breath while slowly counting to six. Exhale slowly through your mouth, slowly counting to eight.

Concentrate on counting and your breath. Feel you lungs fill up with precious oxygen. Feel your heart rate slow. By exhaling more breathe than you inhale, you cleanse all the stale air held in your lungs. Feel the relaxation deep breathing brings.

Deep Breathing exercises help us to be calm and erases the panicking. It effects the brain to function smoothly and lowers your epinephrine level.

It also helps you to calm down and release the tension off of you when you do deep breathing exercises.

I get very dizzy or light-headed when doing deep reathing exercises. Sometimes I get a headache. What does this mean?