
From the International Journal of Sport Nutrition and Exercise Metabolism and the Department of Kinesiology at Indiana University:
Karp JR, Johnston JD, Tecklenburg S, et. al., Chocolate milk as a post-exercise recovery aid, 2006; 16, 78-91
Nutshell: You need glycogen stored in your liver to perform well in endurance exercise. You resynthesize glycogen between training sessions most rapidly if you consume carbohydrates within 30 minutes after exercise, and adding protein to the mix will improve endurance performance compared to drinks with carbos alone.
This team of investigators hypothesized that the time to exhaustion (TTE) during a second bout of exercise after a first that depleted glycogen would be longer if the subjects drank chocolate milk (CM) {low-fat from Kroger's I kid you not} as compared to those who drank simple fluid replacement (FR) {aka Gatordade}. In addition, they figured that the TTE for CM drinkers would be equivalent to the TTE for those who drank carbohydrate replacement (CR) drinks {something called Endurox R4}
BREAKING AWAY??
SO--- they got 9 male cyclists from IU's cycling team and ran them thru 4 spin-classes from hell (er, testing sessions) comprised of 2 bouts of cycling to exhaustion separated by 4 hours of recovery. During those 4 hours they consumed equivalent amounts of either CM, Gatorade (FR), or Endurox (CR). After all the abuse, the subjects cycled 49% longer after CM as compared to Endurox, and 54% longer after Gatorade as compared to Endurox. BUT there was no statistically significant difference between CM and Gatorade......
BACK TO DRINKING THE KOOL-AID???
The investigators, who by the way were supported by the Dairy Council for this work, state as their conclusion, "results of the study suggest that chocolate milk, with its high carbohydrate and protein content, may be considered an effective alternative to commercial fluid replacement and carbohydrate replacement for recovery from exhausting glycogen-depleting exercise."
So, while chocolate milk may be very "sexy", at least in this study, it didn't seem to provide any advantage over Gatorade..........