Cory Booker (D-NJ) captured the country’s attention with an extraordinary speech protesting President Trump. Booker’s 25 hours-plus remarks on the Senate floor broke a more than 60-year-old record while earning hundreds of thousands of views and hundreds of millions of likes on social media.

To physically prepare for the feat, Booker used “a lot of tactics,” he said, including fasting and curbing water intake in the days before to make sure he could stand for so long and wouldn’t have to take a bathroom break.