“The relaxation techniques incorporated in yoga can lessen chronic pain, such as lower back pain, arthritis, headaches and carpal tunnel syndrome,” explains Dr. Nevins. “Yoga can also lower blood pressure and reduce insomnia.”

Other physical benefits of yoga include:
Increased flexibility
Increased muscle strength and tone
Improved respiration, energy and vitality
Maintaining a balanced metabolism
Weight reduction
Cardio and circulatory health
Improved athletic performance
Protection from injury

Mental Benefits
Aside from the physical benefits, one of the best benefits of yoga is how it helps a person manage stress, which is known to have devastating effects on the body and mind. “Stress can reveal itself in many ways, including back or neck pain, sleeping problems, headaches, drug abuse, and an inability to concentrate,” says Dr. Nevins. “Yoga can be very effective in developing coping skills and reaching a more positive outlook on life.”
Yoga’s incorporation of meditation and breathing can help improve a person’s mental well-being. “Regular yoga practice creates mental clarity and calmness; increases body awareness; relieves chronic stress patterns; relaxes the mind; centers attention; and sharpens concentration,” says Dr. Nevins. Body- and self-awareness are particularly beneficial, she adds, “because they can help with early detection of physical problems and allow for early preventive action.”

http://www.osteopathic.org/osteopathic-health/about-your-health/health-conditions-library/general-health/Pages/yoga.aspx