"I think the weekend phenomenon is a reward people feel like they deserve at the end of the work week," said Bernadette Latson, a registered dietitian at the Southwestern Medical Center in Dallas.
"It's a good idea not to be overly restrictive, but when people begin the weekend indulgence at lunch Friday, that's three days, or almost half the week."
Dinner at a good restaurant once a week is usually sufficient in keeping people feeling satisfied and not deprived, said Latson.
"But a single meal need not turn into a weekend of high-calorie meals," she said.
Latson suggests a Saturday night spent cooking a big meal is a good way to curb the desire to eat anything and everything throughout the weekend.