I'd like a large cherry slushie...to go!
Gina Kolata's "To Beat the Heat, Drink a Slushie First" (NYT) observed that those who exercise in the heat can benefit from some new research: "they can delay the time to utter exhaustion by getting people a bit chilled before they start." Citing this study, Kolata says that increasing endurance in the heat may be as simple as guzzling a slushie beforehand:
... young male recreational athletes who drank a syrup-flavored ice slurry just before running on a treadmill in hot room could keep going for an average of 50 minutes before they had to stop. When they drank only syrup-flavored cold water, they could run for an average of 40 minutes.
Now, if we could just find a solution for brain freeze...