In yet another study done by the USDA, cinnamon has been shown to help regulate blood sugar. In addition, people who consume cinnamon regularly have a higher blood antioxidant level.
The method by which it lowers blood sugar is (as seen in previous studies, not this one) is that it increases the insulin sensitivity of muscle cells. This means that more of the sugar in your blood gets pushed into the muscle cells, which is beneficial for both your blood sugar levels and your glycogen level (used in high intensity exercise).
Please do not start consuming more than a teaspoon of cinnamon a day since it does have a toxic component to it, which if ingested in large amounts for long periods of time, could have negative health effects.