But because we can’t all have Hollywood trainers on speed dial, Kendall lets us in on a little secret. When she’s on the road, or simply not at the gym, she uses the Instant Abs Trainer app.
The free app works like a pocket PT, with hundreds of core-toning exercises to choose from – including an alarmingly named workout called ‘Body on Fire.’
“Sometimes when I’m watching TV, I think to myself ‘I should be doing crunches and sit-ups right now,’” Kendall writes. “Then I get off the couch and do it [with the app].”
Kendall-level flat stomach, here we come.