Commentary:
The Spleen provides Qi and Blood
for the muscles and the four extremities. The fullness and strength of the limbs depends
on the Spleen's function of transportation and transformation. The activity of the
limbs depends on yang Qi which is produced by the Spleen. If the Spleen function is
weak, the extremities are no longer sufficiently supplied with Qi and Blood. The muscles
become weak and cold, even atrophy can develop. For example, some athletes present
weaker muscles on one side of the body, despite balanced training. Impairment of the
Spleen function can manifest in health problems, that appear simultaneously in all
four extremities.
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