Coffee good, coffee bad, coffee good, coffee bad. The studies twist back-and-forth. Many demonize caffeine, while others embrace its mild doping effects. Coffee is beneficial in so many ways. I understand where my coffee beans come from, unlike the perverted beverages of the Big Food complex.
If you're on a road trip, you may respond like the 24 volunteers for an experiment from February who were subjected to two hours of simulated "monotonous highway driving," given a short break, then sent back out for two more hours. Those given a cup of coffee during the break weaved less, and showed reductions in driving speed, mental effort, and subjective sleepiness. If you're on a weight-training regimen, it can provide a mild (and legal) doping effect.
If you're trying to enhance your workout, the results of one experiment from October found that drinks containing caffeine enhances performance. And then another one from Dr. Martin in 2008: He coauthored a study of people enrolled in Alcoholics Anonymous in which there appeared to be an association between upping coffee intake and staying sober.
For my 5am workouts, a giganta-expresso is a secular ritual. Follow me on Twitter @karendecoster.