Gigi Hadid pins sticky notes around her house to remind her to exercise.

The 21-year-old supermodel - who was crowned this year's International Model at The Fashion Awards 2016 on Monday (05.12.16) - has revealed her secret to staying in shape is pinning notes in her kitchen tell her to squat.

Speaking to about her workouts, she said: ''I put a sticky note in my kitchen that just said 'squats' and every time I walked passed the squat sticky note I had to do 15 squats.

''It's a good trick because you have to have integrity with yourself. No one else is watching but you're like, 'Okay, I have to do this for myself,' which is important.''

However, the catwalk icon has revealed toning her pert posterior is her least favourite exercise because she finds them ''painful''.

She said: ''They're painful, and you have to do so many for them to work.''

Although the blonde beauty - who is currently dating singer Zayn Malik - has hinted her preferred sport is boxing because she doesn't feel she is being scrutinised when she is training in the ring.

She said: ''What's great about boxing is that I couldn't come to New York and sign up for Equinox, and go running. It was not good. So, I knew I needed to find something that gave me a coach, gave me a family-- so that when I walk in, it's like my big brothers. They're like 'What up!' They don't care about who I am. That's what I needed, and they don't care about what my body looks like. They care that I give a good punch, and that's how I want to be judged. That's what makes me proud of myself.''

And Gigi - who began modelling when she was two years old and signed to IMG Model Management in 2013 - has revealed she has never called in sick to work.

She said: ''I've never taken a sick day. I just realized! I feel that pressure of not taking time for yourself because you don't want it to affect your professionalism.''