I'm sure that you have heard about the word yoga before, it is  a group of physical, mental, and spiritual practices or disciplines which originated in ancient India.
I have.  It suppossed to be very good for the mind and to relieve stress
Yes. Depending on if you want to follow the practice of  Hinduism, Buddhism, and Jainism each one have their own way with yoga
There is a relatively new trend as well, called Hot Yoga.  It is yoga performed in warm conditions and causes perfuse sweating
well i know that the most popular types are  Hatha yoga and Rāja yoga.
Studies have shown that yoga can be very beneficial mentally and physically for children and young adults.
to pre-Vedic Indian traditions; it is mentioned in the Rigveda, but most likely developed around the sixth and fifth centuries BCE, in ancient India's ascetic and śramaṇa movements. The chronology of earliest texts describing yoga-practices is unclear, varyingly credited to Upanishads. The "Yoga Sutras of Patanjali" date from the first half of the 1st millennium CE, but only gained prominence in the West in the 20th century. Hatha yoga texts emerged sometimes between the 9th and 11th century with origins in tantra.
Yoga
Yoga
Yoga (; ; ) is a group of physical, mental, and spiritual practices or disciplines which originated in ancient India. Yoga is one of the six orthodox schools of Hindu philosophical traditions. There is a broad variety of yoga schools, practices, and goals in Hinduism, Buddhism, and Jainism. The term "yoga" in the Western world often denotes a modern form of Hatha yoga, yoga as exercise, consisting largely of the postures called asanas.
The origins of yoga have been speculated to date back