Deep-breathing techniques can help quiet the mind while they energize the body and brain. To promote readiness to learn suggests:

(Stine, Jean Marie. Double Your Brain Power. Prentice Hall, Inc., 1997, p 48)

Proper breathing can release molecules of emotion from the brain stem. Exercise and proper breathing can release and wash away substances that have accumulated in the brain. (Pert, Candace, PhD. Your Body is Your Subconscious Mind (audiocassettes). CO: Sounds True, 2000)

Deep rhythmic breathing can help to relax the mind and improve alertness. (Padus, Emrika, et al. The Complete Guide to Your Emotions & Your Health. PA: Rodale Press, 1992, pp 365-368)

Studies: changes in the rate and depth of breathing produce changes in the quantity and kind of peptides that are released from the brain stem. Breathe consciously. By altering breathing (e.g., hold breath or breath extra fast) peptides (e.g., endorphins) diffuse rapidly throughout the cerebrospinal fluid in an attempt to restore homeostasis and can even reduce pain. (Pert, Candace, PhD. Molecules of Emotion. NY: Scribner, 1997, pp 186-187)

Effective breathing can help to cleanse your system. Breathe with specific ratios to eliminate toxins via lymphatic system (inhale for 4 seconds, hold for 16, exhale for 8). (Robbins, Anthony. Unlimited Power. NY: Fireside, 1986, pp 170-174)