Fitness
The singer began training six months ahead of the first show.
As such, the singer began training months in advance.
Fast for fast songs, and a jog or a fast walk for slow songs.

Swift also didstrength trainingwith her gym, Dogpound, and incorporated weights and conditioning to prep her stage-ready stamina.
To do each move over and over again until the choreography became second nature.
She Adopted An Alcohol-Free Lifestyle
While touring, Swift does take the occasional day off.

Between shows, shes often spottedout and about with friendsor cheering in the stands atboyfriend Travis Kelcesfootball games.
But one thing she wont do is drink.
Swift toldTIMEthat she gave up drinking to confirm she always had enough energy to perform.

Doing that show with a hangover I dont want to know that world.

source: www.bustle.com