Speaking with Zane Lowe for Apple Music, the Bad Guy singer got candid about her new routine and what made her become a "gym rat."

Getting Into Fitness

Billie Eilish performing on stage.

“I’ve been completely changing the way that my life is involving fitness. I’m a gym rat now. When did that happen, I don’t know. But it did,” she shared.

“And I’ve been working really hard. And it started with, ‘I can’t get injured anymore. I can’t do it.’ Not going to let myself live like that because I lived like that for years. It sucked. I was like, ‘No, no, no, I can’t get energy drained anymore. That can’t be part of my life anymore. I’ve got to figure it out.'”

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