Most days I feel good if I can power through a full set of sit-ups. Model Izabel Goulart (who recently showed off her hard-earned abs on the Victoria’s Secret runway), however, puts any amount of crunches I can muster to shame with this superhuman Pilates move she posted to Instagram. Should you be compelled to tighten your stomach muscles on a lazy Sunday, we dare you to give this one a shot.
—Amber Kallor, Style.com
