Some scholars suggest that the "Sushruta Samhita" dates back to the first millennium B.C.E., while some parts of the text may have been even older. There is still a large degree of uncertainty as to how many authors contributed to it and when these various parts were written.
Sushruta, known by some as "the founding father of surgery," is credited as being the main author. He is given the title of Maharishi (great sage). It is believed that he was a physician who lived sometime in the period between 1200 B.C.E. and 600 B.C.E. It has also been said that there were two different people both with the name of Sushruta who wrote parts of the book in different centuries.
Among the many suggestions given for living a healthy life is the need for regular, moderate exercise. This fits well with the aims and practices of many modern yogis. The health benefits of practicing yoga regularly continue to be felt by millions of people today.