Test    Yoga has evolved from an ancient practice in India to a popular health trend in the United States and Europe. As yoga has grown and spread, it has multiplied into diverse styles practiced for distinct purposes. Despite such broad variations, practitioners of almost all types of yoga report increased wellbeing. There is a growing evidence supporting such claims, but most findings are still tentative given the relatively recent rapid expansion of yoga research since 2000. Research does show that yoga is a feasible, practical, low-risk intervention as a complementary therapy for many physical and mental health conditions. This brief provides an overview of the current state of research on yoga interventions, for mental, physical, and cardiovascular health and for autoimmune and other disorders. These interventions may be particularly beneficial for the elderly, though they should be practiced with caution by vulnerable groups. Yoga is an adaptable practice—it may be done seated in a chair or lying on the floor— and so far there is little evidence to suggest that one style is better or more effective overall than others. Additionally, few adverse events from yoga interventions have been reported. Research on yoga interventions has become more rigorous over time, with an increase in randomized, controlled trials and improved reporting on yoga style and “dosage”; nonetheless, methodological challenges persist. Yoga may be a particularly difficult topic to study compared to typical medical interventions, given the difficulty of defining yoga styles and “dosages”, the reliance on self-reporting, and methodological variety. Researchers will continue to refine their methodology, as well as expand the study of yoga into other areas such as in connection with children, less common conditions, and issues of cost-effectiveness and cultural perceptions 
 
 
Kundalini yoga is an energy-based style that combines repetitive movement with breath, chanting, and meditation.
 
Prenatal yoga is a style for pregnant women that focuses on preparing for labor and delivery through pelvic floor work, breathing, and bonding with the baby.
 New yoga styles are emerging all the time, including anusara yoga, Forrest yoga, Jivamukti yoga, Power yoga, and Buti yoga. Yoga hybrid styles are increasingly popular, such as pilates-yoga (PiYo), acrobatics-yoga (AcroYoga), weight-lifting-yoga (Yoga Sculpt), Stand-Up-Paddleboard-yoga, and a wide range of animal-themed yoga classes, where cats, dogs, goats, sloths, etc. may be present.