Chinese Medicine
That great thinkers such as Kong Fu Zi (Confucius), Lao Zi, Meng Zi, and Zhuang Zi preceded the great classic of Chinese medicine, the Huang Di Nei Jing - 'The Yellow Emperor's Classic of Internal Medicine' - which was compiled between 300 and 100 BC.
While neither a Daoist nor a Confucian text, it draws on both their traditions and perspectives. The Daoist philosophers in particular, who were masters of the simple and essential, have always been known for their interest, not only in the nature of reality.
But also the maintenance and improvement of vitality through specific exercies and techniques such as meditation, breathing, and massage.
Confucius (Kong Fit Zi) (551-479 BC).