Many people have the misconception that learning Qigong or Taijiquan must be super focused, super on-the-ball, super serious, to get any effect.
Being such will only delay any positive effect on our health, because most masters have no understanding on the art of Qigong or Taijiquan.
Qigong and Taijiquan are based on the way of Tao (道), and in Tao, the sole keyword is the Middle Path (中庸之道). Being Middle Path, everything must be in the quantity of Just Nice, not over the line.
In ancient China, martial arts experts must be on the long route of mental cultivation to reach a point where their craft merge with them in one. Only when they achieved this level, will they be able to exercise the martial arts in absolute perfection.
With perfection, one cannot be tuned into the extreme end of focus and determination, because with that, the body and mind cannot relax. Without relaxation, they body cannot be in the flow with the mind and Universe.
All of us have our own biodynamic rhythm in our body, we must work with it to regain balance in our life, not heeding the pace of others.
In Qigong and Taijiquan, we must first understand how to focus and serious about our craft correctly. It is important to be disciplined, but not to the point that we're living like robots, our mind and heart cannot be hardened like steel.
In the initial parts of learning Chinese martial arts, this extreme level of focus is needed to build the body's stamina and tendons' suppleness. But to reach the zenith of the craft, the mind must let go and go into its unique flow.
A good Qigong or Taijiquan master must be compassionate and benign who also observes well in his/her students, so he can guide all of them well, according to their ability.