"Jinggong" (seating exercise) and "Donggong" (exercise in movement) regulate and activate the Qi. The life force is then collected in the three main body energy centers called Dantians.
When the Qi has accumulated sufficiently in the Dantians it will also fill the 8 deep (extraordinary) energy channels and be abundant throughout the 12 main meridians and amply supply and regulate our organs which produce our essences.
Thus our body becomes healthy, vigorous, and we have ample blood and bodily fluids.
Regular Qigong practice is a path for a long and healthy life. Specific Qigong exercises can be used against such ailments as headache, high blood pressure, insomnia etc.