As a fellow cyclist I am in tune with these studies. Beets are rich in nitrates and the nitrates are the performance boosting secret in this great veggie. Certainly the carb content is going to also help.
In the study they gave cyclist 16 ounces of beet juice before riding. There was a significant increase in performance.
With the NutriBullet you will need to experiment a little. Try 1 large beet with 4 ounces of coconut water and the rest spring water 2.5 hours before the ride.
It does work. Let me know how it goes for you. Healthy wishes, Wally Bishop C.N.C.