Yi Jin Jing QiGong 易筋经气功

Muscle/Tendon Change Classic
According to legend, the YijinJing was said to be left behind by Bodhidharma after his departure from the Shaolin Monastery, and discovered within his grave (or hidden in the walls of the temple) years after he had left.

The Five rules of Yijin Jing are:
Quietness
Like lake water reflects the moon, a calm spirit allows energy to move inside the body.
Slowness
In order to use and flex muscles deeply, to get maximum extension and move Qi and Xue, slow movements are required.
Extension
Each movement must be brought to the maximum.
Pause
Efficacy comes through waiting and keeping tension for a longer time.
Flexibility
Limbs and trunk must be extended so that blood and energy can circulate, so we have flexibility.