CelebrityCelebrity Fitness
SplashNewsOnline.com; Courtesy of Harpercollins
If You've Hit a Plateau
Get some sleep! "Skipping two hours of sleep is like adding calories or subtracting cardio time from all of your hard work," says Gunnar Peterson, who helped Jennifer Lopez prepare for her first triathlon in 2008. "Adding in an extra hour or two of sleep for 10 days will help you break through your plateau and start seeing results again."BONUS TIP:
If you still aren't seeing results, switch up your routine with Peterson's core secrets book The Workout.
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