But, truth be told, it’s actually quite possible to burn belly fat in just a week and a half. The key to success is in the details, and you’ll need to follow them meticulously. But don’t stress: This is a short-lived emergency shred, not a long-term lifestyle plan. So whether you’re prepping for a party or a vacation, we’ve got you covered.

1. Go to bed

Exhaustion can give you a gut. “Sleep deprivation disrupts your metabolism, seriously sabotaging efforts to maintain an ideal weight,” says Jana Klauer, M.D., an obesity researcher at NYC’s St. Luke’s-Roosevelt Hospital. Here’s how it works: Fat cells produce a hormone called leptin, which tells the body how much potential energy it has stored. Since leptin production peaks at night, when you’re asleep, sleep deprivation can throw levels of the hormone out of whack. The end result? Your body has no idea how much energy it has banked, so you end up storing fat instead of burning it.