Who better then to turn to for power-packed variations than those who make their living from having the most toned stomachs on the planet.
Here are five ab-mazing change-ups from the flattest midriffs in the business.
 1. Bar Refaeili – the weighted row
This supermodel shares her sweatiest gym moments while incorporating weights into her planking. Think along the lines of a one-armed row for a serious full-body burn.
2. Ellie Goulding – the power ball
So this is how she hits those power-notes. For an extra tough workout, the singer (oh, and running junkie) combines a medicine ball roll-out under one arm with a one-handed push-up… yes, while she’s planking.
3. Karlie Kloss – the balance buster
We already know this unstoppable model can do it all—and stay healthy on her way to world domination. One workout she makes sure to never skip (in addition to her regular jogs and Pilates, boxing, and ballet sessions)? The classic plank—here, increasing the level of difficulty with the addition of the balancing bosu ball and one lifted leg. Try alternating legs, holding each one up for at least 30 seconds.
4. Hannah Bronfman – the one-handed twist
The social media star, who was recently signed as an ambassador for Adidas’ #girlpower campaign, constantly posts her tough-as-nails morning workouts (not to mention her envy-inducing vacation shots). Combine your morning yoga stretches in side plank position for a refreshing body wake-up—cute pup optional.
5. Martha Hunt – the ball game
Monday planks ??@VictoriasSecretSport @BodybySimone
A video posted by Martha Hunt (@marhunt) on
This Victoria’s Secret model is a regular at New York City healthy hotspots like Body By Simone and The DogPound. But at the end of the day, she knows no boutique class can replace a good old plank-and-exercise-ball combo. Here, she shows off how tough but effective (we see those shaky abs) the move can be.
