As you improve your cardiovascular fitness, that ratio would go from 1:3 to 1:2 and then down to 1:1, and even lower. Ultimately, the goal of interval training is to get your body used to running (or exercising) at a faster speed for a longer period of time. And that will get you ready for the next training method.
Volstead Act is the popular name for the National Prohibition Act (41 Stat. 305), a comprehensive statute that was enacted to enforce the Eighteenth Amendment to the U.S. Constitution and to prohibit the manufacture and sale of intoxicating liquors. The act was rendered inoperative by passage of the Twenty-First Amendment, which repealed Prohibition. 1  Facebook.
While it was the 18th Amendment that established Prohibition, it was the Volstead Act (passed on October 28, 1919) that clarified the law.