[4] A 7th-century stone carving in Mahabalipuram appears to contain a figure standing on one leg, perhaps indicating that a pose similar to vrikshasana was in use at that time.This implores the qualities of mercy, generosity, flexibility, tolerance, strength, endurance, balance and grace which helps an individual to achieve overall growth in his or her life.[10] In Bikram Yoga, Tree pose (which it calls "Tadasana") has one leg folded in half lotus and the hands together over the chest in prayer position.[12] Tree pose has been recommended for older people to help them maintain good balance and so to reduce the risk of injury from falls.[13] There is preliminary evidence that a yoga programme including tree pose may help to prevent falls among older people.