YOGA is a Sanskrit term meaning to join, unite or yoke together, and the essential purpose of yoga is to bring together body, mind and spirit into a harmonious whole.
The central methods of yoga are physical postures or ASANAS and movement, breathing techniques or PRANAYAMA and meditation. Yoga includes guidance on healthy lifestyle, eating habits, mental attitude, and Ayurvedic medicine is also part of the Yogic path to health and balance.
Hatha yoga is the path of physical yoga, which is the most popular branch of yoga in the West. HA means SUN, and THA, MOON, so Hatha Yoga is the joining, or the yoking together of these different energies in harmonious equilibrium, positive and negative, active and receptive.