The history of yoga goes back 5,000 years. It originated in India, and first time word yoga was found in written form was in Rig Vada, one of sacred texts used by Vedic priests. Yoga is a means of achieving spiritual enlightenment.

Originally, yoga techniques were passed down from teacher to student through word of mouth. These techniques had never been written down until Indian sage Patanjali wrote down a systematic method of yoga in Yoga Sutras. Patanjali is considered to be father of yoga.

According to Patanjali, there are eight limbs of yoga, which lead to ultimate goal of enlightenment.

Yama - abstaining from violence, stealing, lust, greed

Researchers - studying 488 runners in 2002 Bost Marathon found that bigger danger is in drinking too much fluid (water or sports drinks) rather than not enough. They found that 62 of 488 runners, more than one in eight, had a serious fluid and salt imbalance after event. And three of them were in danger zone.

Hyponatremia - a condition where drinking too much water or other fluids to point where salt level in body drops too much - can develop during marathon races where runners drink constantly to stave off dehydration.