"I work out a lot," Gaga said. "I also do versa-climbing while I sing, and I sing while I do it. Because the show is full on cardio, [as are] my performances most of the time. So, it's cardio while singing."
But in many ways, the "Bad Romance" singer has been preparing for a show of this magnitude since the beginning of her career. When Strahan notes that she started out playing dive bars and now she's playing the biggest show in the world, Gaga isn't fazed.
"I would say when you play a dive bar, my philosophy is you should play it like it's [Madison Square] Garden," Gaga explains. "So, when I play the NRG stadium in Houston, I'm gonna play it like it's a dive bar."
ET was in Houston on Thursday when Gaga opened up about her upcoming performance at an NFL press conference, and said the show will span her "whole career."
"We went through my whole career, and chose songs both the football fans and the people that are just tuning on for the halftime show will enjoy," Gaga teased. "I don't wanna give away also how many costume changes I'll be doing ... We will be doing some very interesting and exciting stuff during the show, and I'm excited for you to see it."
"I will say it's a tremendously athletic show, and it's something we really talked about when creating the halftime experience," she added. "I mentioned that I thought it was important for us to consider, you know, high adrenaline."