A Fitness Trainer Shares 9 Reasons You're Struggling to Lose Weight (and How to Fix It!)

"You can't diet forever without your metabolism slowing down, meaning you'll be burning fewer calories overall," Marci explained. "When you need a break depends on how long you've been dieting and how much weight you have to lose. But a period of 1-2 weeks at maintenance for every 2-12 weeks of dieting is a good place to start."