Kylie Jenner exercises twice a day

Sharing a video on Instagram, she wrote: "2nd workout starting, let's gooooo! (sic)"

Meanwhile, Kylie previously revealed she craved bread during her pregnancy.

Revealing she spent most of her time in labour desperate for a specific style of bread sold at restaurant Craig’s, she said: "Fun fact, Craig's in LA has the best bread of all time, specifically this one. This is what I craved my whole labour and it's the first thing I had right after I gave birth to Stormi."

And Kylie also revealed she ate a "magnitude" of food when she was pregnant.

She admitted: "[When I was pregnant] I ate lot of Eggos (waffles) - and if you know me, I hate Eggos, always have. But when I was pregnant, I was like mmm! I ate like three a day. I just ate like a magnitude of food - so much, so much food. And, I was having a girl, and they say when you're having a girl, you crave more, like, sweets vs. salty, and that was true for me. Like, a lot of Krispy Kremes, a lot of sweets.

Nothing weird or crazy, but just really sweet things - ice cream, just whatever I wanted."

However, Kylie later admitted she changed her eating habits in order to return to her slender frame.

She said: "Honestly, it's all about diet for me. I'm naturally just a really skinny person...like [sister] Kendall Jenner, but not like Kendall - she's naturally like, model status. But, yeah, I always had a really flat stomach, but I never felt it went back to before Stormi until recently. And I feel like it has a lot to do with diet. Like, I really eat very crazy usually, like whatever I want - pizza, pasta, a lot of diary, and I just kind of cut that all out, and have just been eating better, and I feel like that's the trick for me, personally."