An exercise scientist reveals exactly how long you need to work out to get in great shape

• If losing weight is part of your New Year's resolution, setting a timeline can help you achieve your fitness goals and have the best chance to keep it off.
• This also helps if you want to get in shape before a big event coming up in 2019, like a wedding or reunion.
• Exercise scientist Shawn Arent tells us just how long you'll need to lose those pounds and make the most progress in a short amount of time.

Shawn Arent is the director of the Center for Health and Human Performance at Rutgers University and a Fellow in the American College of Sports Medicine.

EDITOR'S NOTE: This piece was originally published on January 1, 2017.

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