Standing meditation has many of the same health benefits of sitting meditation as far as reducing stress and regulating mood, increasing oxygen to the body, reducing blood pressure, and stimulating the production of necessary chemical compounds in the brain. When practicing standing meditation, the health benefits are multiplied. Bones are strengthened, as are muscles and tendons. The nervous system is regulated, and over-all inflammation in the body is reduced. Flexibility and stamina are built. Some suggest that only the very elderly or ill should meditate while sitting down, because the health benefits of standing meditation far outweigh those of sitting meditation. T'ai Chi IS moving meditation, and some postures are used for standing meditation.
As with all T'ai Chi postures, in order to do standing meditation, you must be connected to the Earth and grounded. You must relax your body into the postures to open the meridians and allow the chi to flow unrestricted. "Holding Back the Ocean Waves" is an excellent standing meditation posture. Stand with feet roughly shoulder width apart, knees slightly bent and coccyx bone tucked under. Your arms are relaxed at your side, but open so as not to restrict the chi flow; palms face behind you. Imagine an ocean wave is behind you pushing against your palms and arms, and that you are holding the rushing water back. This posture immediately produces a strong grounding effect in the legs, and a feeling of chi in the hands. Relax and repeat multiple times for maximum benefit. Another great standing meditation posture is "Holding a Jug." Feet are positioned with one leg slightly forward, taking care both feet are not on the same axis; arms are raised as thou holding a large jug with both arms. The weight is slowly shifted between the front leg and rear leg while keeping arms extended around the "jug". Be sure to switch which leg is forward when doing multiple repetitions so all of the body is exercised and remains in balance. Both postures are great to practice standing meditation, and are an excellent chance to find the "stillness in motion" as your chi energy is constantly moving, even when the body is standing still.