Yoga is a practice that has been around for 5,000 years. Although many regard Yoga as just another form of exercise, it's really a much more comprehensive practice that integrates mental, physical and spiritual elements.
In fact, it is said the physical positions of yoga represent only about 10 percent of its value, and the other 90 percent lies in the mental and spiritual growth that happens on the mat.
Yoga can be regarded as a form of meditation that demands your full attention and participation. The Yoga positions (asanas) are tools for helping you learn new ways of moving and new ways of responding to your body and mind, which can be extended into other areas of your life.
The health benefits of Yoga are many. It strengthens and tones your body, increases circulation and oxygenation, energizes you in the morning and helps you unwind in the evening.
People report the disappearance of aches and pains, better immunity, improved sleep, lowered blood pressure, improved digestion, and faster healing when they do Yoga.
Most people also feel more grounded, and many report increased compassion for others as a direct result of the compassion learned on the mat.
That said, from a purely physical standpoint, Yoga is excellent for your core and compliments other parts of your overall exercise program, such as interval and strength training. It strengthens your back, pelvis, shoulders, and spine—and of course helps cut and reveal those six-pack abs!
For the rest of the story: http://fitness.mercola.com/sites/fitness/archive/2014/08/22/yoga-for-abs.aspx