Ba Duan Jin 八段錦 - Eight Pieces of Brocade

Ba Duan Jin is a qigong exercise I do as a warm-up before practicing Tai Chi. Qigong is "a system of coordinated body-posture and movement, breathing, and meditation with roots in Chinese medicine, philosophy and martial arts." (by Wikipedia) Like Tai Chi, it involves a series of slow movements, mild stretching and breathing.

It consists of 8 forms and takes about 15 minutes. This short exercise refreshes you both physically and mentally, and is easy to be incorporated in your busy life.

Here is a step-by-step video with detailed instructions.

Once you learned it, you can practice with this video below with the calming traditional music without audio commentary.