“The principal original finding of this investigation is that three days of dietary supplementation with nitrate-rich beetroot juice (which doubled the plasma nitrite) significantly reduced the O2 cost of cycling at a fixed sub-maximal work rate and increased the time to task failure during severe exercise,” -
nutraingredients.com
Researchers suspect that the stamina increase may be a result of the nitrate turning into nitric oxide in the body, reducing the oxygen cost of the exercise (nitric oxide increases blood flow by triggering vasodialation of blood vessels
cvphysiology).
MY COMMENT: I hate beets!
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