Qi is everywhere and always available for use. There is no scarcity of Qi anywhere in nature. However, if you impede your natural Qi flow through mental barriers, mostly created by emotional stresses, or through physical barriers, mostly created by physical injury, lack of exercise, poor diet, lack of sleep, impure water and air and/or exposure to other unhealthy substances, then you may experience what has been called a blockage of Qi. This blockage is not an absence of Qi, but an impediment to its natural function/flow.
The best way to improve your Qi flow is to be sure you do as little as possible to impeded its natural function. This is accomplished by keeping a healthy body and calm mind. There is no need to perform any form of Qi Gong exercises,
there is no need to stand, sit, lie down etc. as a formal exercise. In fact, any of these forms, performed improperly, that is, for too long, or under less than optimal conditions, can be just as harmful as beneficial.
The emphasis above should on the word “need”, there being no “need” is not the same thing as saying these exercises are of no benefit. It is only that they are NOT “necessary” for a healthy natural flow of Qi. The belief that one “must” perform Qi Gong exercise in order to maintain a healthy quantity of Qi is a fantasy, and/or a misunderstanding and misapplication of the principles of Qi and Tao.