They have variously emphasised modern yoga's international nature with its intercultural exchanges; its variety of beliefs and practices; its degree of continuity with older traditions, such as ancient Indian philosophy and medieval Hatha yoga; its relationship to Hinduism; its claims to provide health and fitness; and its tensions between the physical and the spiritual, or between the esoteric and the scientific.
[2] Blavatsky helped to pave the way for the spread of yoga in the West by encouraging interest in occult and esoteric doctrines and a vision of the "mystical East".
[9] She defined modern yoga as "signifying those disciplines and schools which are, to a greater or lesser extent, rooted in South Asian cultural contexts, and which more specifically draw inspiration from certain philosophies, teachings and practices of Hinduism.
[13] He questions the De Michelis typology as follows: Can we really refer to an entity called Modern Yoga and assume that we are talking about a discrete and identifiable category of beliefs and practices?
"[9] In contemporary practice, modern yoga is prescribed as a part of self-development and is believed to provide "increased beauty, strength, and flexibility as well as decreased stress".
[9] Modern yoga is variously viewed through "cultural prisms" including New Age religion, psychology, sports science, medicine,[17] photography,[18] and fashion.
According to her, asanas "only became prominent in modern yoga in the early twentieth century as a result of the dialogical exchanges between Indian reformers and nationalists and Americans and Europeans interested in health and fitness".
[25] The author and yoga teacher Matthew Remski writes that Norman Sjoman[c] considered modern yoga to have been influenced by South Indian wrestling exercises; Joseph Alter[d] found it torn between esoteric and scientific; Mark Singleton[e] discovered a collision of Western physical culture with Indian spirituality; while Elliott Goldberg[f] depicted "a modern spirituality, written through richly realized characters" including Krishnamacharya, Sivananda, Indra Devi, and Iyengar.
[30] The scholar of religion Anya Foxen writes that "modern postural yoga", especially in America, was created through a complicated process involving both cultural exchange and syncretism of disparate approaches.
Among the many ingredients are the subtle body and various strands of Greek philosophy, Western esotericism, and wellness programs for women based on such things as the teaching system of François Delsarte and the harmonial gymnastics of Genevieve Stebbins.