Shape.com reports on 'refeeding' days and who would potentially need one.

According to Jason Machowsky RD, CSSD, RCEP, CSCS, sports dietitian and sports performance specialist at HSS, a 'refeed day' typically "refers to a particular day of increased caloric intake to refuel the body after having been in a depleted state, due to either caloric restriction and/or increased physical activity".

Essentially, you can up your calories temporarily to compensate for eating less or exercising more. This strategy is often used by people who are following a low-carb diet.

However, there aren't many high-quality peer-reviewed studies that look at this method for weight loss.

"As far as boosting the metabolism, there are so many factors that impact metabolism that it's hard to tease out the effects of a single refeeding day," said Machowsky.

Read the full article at Shape.com.