Beet this.

There are lots and lots of ergogenic aids out there which tout the ability to help enhance your athletic performance. Anjee what is an ergogenic aid?! you ask. It's basically anything that has the ability to increase your capacity for physical performance. This can be caffeine or steroids.

An article in the Summer edition of Food and Nutrition magazine had an interesting blurb about beetroot juice and its benefits for middle distance and endurance athletes.

Seems there is some research out there that indicated beetroot juice may delay time to exhaustion. Yep. Looks like our beety friends are rich in nitrate which has two effects on the body during exercise:

1. It reduces VO2max which is means it reduces the demand for oxygen during exercise. Obviously the lower the demand for O2 the more efficiently (and longer) you are able to place demands on the body before exhaustion. 
2. Increases muscle efficiency. Muscles are able to utilize O2 more efficiently thus delaying the time to fatigue. 

The acceptable daily intake of nitrate is 3.65 mg/kg/d and the amounts used in the studies are usually about twice this amount so it remains to be seen how safe it is to supplement with beetroot juice but interesting stuff nonetheless. 

Would you drink beet juice to increase your performance? I may have to try it on my next long run......