So what is Qi/Chi? Seemingly we are born full of a life force/bioenergy but with ageing this original source seeps away.

Fortunately, it can be replenished from renewable sources of food, the elements, nature, meditation and mindful exercise.

However, it’s rather like filling a bowl with a hole in it so regular Qigong aims to overcompensate for the loss. As a mind-body-spirit practice it replenishes, balances and unblocks the Qi and stripped of all its oriental mystique, it’s as simple as:-

doing the Three Intentful Corrections (adjust the posture, breath, and mind). Mindfulness, a key component of meditation, produces a heightened awareness of the present moment. 

Qigong Institute

Of course, the ultimate answer to the question is just to do it!