Lizzo's Singing While Running On A Treadmill Is A Flex

She shared a video on Instagram of her new stamina-building routine, explaining that she decided to try it after she saw Miley Cyrus sing "Rebel Girl" by the band Bikini Kill on the treadmill. In the video, she says:

"So I saw Miley running and singing her song, for stamina, so I'm going to run and sing my song for stamina. I'm doing this for all the big girls out there. They said we couldn't do it!"

She then proceeds to get to work.

Lizzo then starts up the treadmill and goes right into her song "Cuz I Love You." Halfway through the song, which includes long, soaring vocals as well as rap lyrics, she asked herself, "Why'd I pick this song, this is so hard!"

She ends up dropping the rap and sticking to the singing portions, but she pushes through.

And interestingly enough, singing while running on a treadmill is a practice that many have done since the end of time, across multiple industries. Kevin Garnett once said he improved his conditioning by adding the workout to his routine, thanks to Beyonce.

One day, Garnett asked his teammate, J.J. Redick, how he believed she was in such great shape. And the rest is history.

"One time I saw [Beyonce] working out. She was doing her dances, and she was singing while she was dancing. So then I'm thinking to myself, 'Maybe I should run and sing at the same time?' So in the offseasons, I would go to Malibu — I would go down to the beach — and I'd run on the beach and I'd be like, 'La la la, la la la, la la la,' while I'm running. So then, when I get on the court — I'm getting back on defense; I'm talking on defense — I don't get tired."

Though combining singing and running is new for Lizzo, she is quite the regular in the gym. She shared her typical workout routine back in June (which includes cycling, jumping rope and squats) and then proceeded to call out the trolls who are ignorantly surprised that she exercises.

"Hey, so I've been working out consistently for the last five years and it may come as a surprise to some of y'all that I'm not working out to have your ideal body type. I'm working out to have my ideal body type. And you know what type that is? None of your f------ business because I am beautiful, I am strong, I do my job and I stay on my job."

In other words: I just took a DNA test, turns out...

Watch the full video here.