"For a real test, I entered a long road race toting three six packs. Presuming a fast racing pace, I planned on having one every 4 miles. We took off like rhinoceros in rut, and I was soon in the lead, chugging one beer after the other and increasing my lead even further. While starting to congratulate myself on the great run, with just three beers left to go, I suddenly felt weak. With two left to go, I lost all my will and just dropped out." He goes on to say more fine tuning would have been a good thing. Prior to the beer experiment, he tried copious amounts of honey (not good), then olive oil (really not good), finally settling on cranberry juice until they switched to an artificial sweetener.
He went on to achieve his goal in 1981 at the age of 40.