Yoga is an old discipline from India. It is both spiritual and physical. Yoga uses breathing techniques, exercise and meditation. It helps to improve health and happiness.
Yoga is the Sanskrit word for union.
Before you opt for a particular style of yoga, you should consider what you’re looking for. Do you want strenuous exercises (stretching, muscle building, bodystiling) or relaxation (stress reduction, health, peace)? Sporting challenge you will find with Power Yoga, Ashtanga Yoga, Iyengar Yoga and Kundalini Yoga. Relaxation you can find with the normal Hatha Yoga and the Vini Yoga.
Try out what is good for you. Ultimately, every yoga teacher has a personal style. Every yoga teacher has weaknesses and strengths. Learn from any yoga teacher. Find your own way to practice yoga. Use what works for you and accept in any yoga class the things that are not effective for you. Above all, always stay on your path of truth and accuracy. Don´t give up on the door to spirituality.