Yoga in its postural form was revived in 1920s by Yoga gurus who emphasised its health benefits. It is a physical exercise consisting mainly of postures.
There are many different variances of Yoga such as Hatha Yoga, Bikram Yoga, Iyengar Yoga and Sivananda Yoga. In addition, there are several hybrids where Yoga has been combined with other disciplines including Martial Arts, Barre, etc. Each of these variances have their own principles. Some focus on breathing exercises, meditation and relaxation, while others are more aerobics and posture orientated.
Practising Yoga has been related to mental and physical health. Studies have shown that practising Yoga can temporarily help with neck or lower back pains and with regards to mental health, it has shown to help with depression, anxiety and stress.
Typically loose-fitting clothings or leggings are worn for Yoga classes.