A group of investigators suspected that rats trained to run on a wheel against a drag would run significantly faster if fed a 20% sucrose solution along with their daily rations. The control group was a group that received only their daily rations. One hundred Mayflower rats arrived from Plymouth Rock Animal Breeders (these rats are known as “designer rats”) and were divided randomly into two groups. Fifty rats on the normal rations ran on the wheel followed by the 50 rats being fed the sucrose supplement (the order was determined by coin flip). The second group ran faster than the first, thus affirming the hypothesis that rats are energized when under a “sugar high.” The researchers generalized the results to grade-school children who are fed a diet of junk food high in processed sugar.