The Buddhists started teaching them and they became a critical element Yoga poses weight loss exercises to focusing the mind and disciplining the body. For historical purposes, yoga can be split Yoga poses weight loss exercises into four separate periods. Pre-Classical Yoga was considered the start of yoga, developed in Northern India well over 5,000 years ago. The first mentions of yoga are in the texts of the Rig-Veda mentioned earlier. This collection was used by Brahmans or the Vedic priests, much like a modern Christian priest would use the bible.
During this time, yoga was refined and eventually developed by Brahmans and mystic seers who documented everything about their practices and beliefs in these Upanishads, which is a huge collection of works giving home to over 200 scriptures. The most well known of the yoga scriptures was also created in this period, about 500 BCE, the Bhagavad-Gita. Yoga is a broad term, as there are actually many different teachings of yoga.