A new Swedish study done on mice found that nitrates, like those found naturally in spinach, beets (yes, dad), chard and lettuce had a "powerful effect" on boosting muscle strength. One group of mice was given water enriched with nitrate for a week and their muscles, compared to the control group, were much stronger at the end of the week...particularly in their legs and feet. Better yet, they had higher concentrations of two proteins involved in the body's calcium balance - which is important in muscle contraction. These stronger mice were given an amount of nitrate that is equal to what a human would get from 7 to 10 ounces of fresh spinach.
So what are you waiting for...go eat some spinach!