According to research from the American Psychological Association, you may be able to lose more weight if you keep a similar diet and consistent calorie intake every day.
This research health psychologyshowed that adults who followed a structured eating pattern during a 12-week behavioral weight loss program achieved better results than adults who changed their food choices more frequently. Participants who repeated their meals and kept their caloric intake stable over time lost more weight than those who ate a more varied diet.
“Maintaining a healthy diet in today’s food environment requires constant effort and discipline,” said lead author Dr. Charlotte Hagerman of the Oregon Research Institute. “Creating a routine around eating can ease the burden and make healthy choices feel more natural.”
Habit tracking and study design
To investigate the role of routine, researchers analyzed detailed real-time food records of 112 overweight or obese adults participating in a structured weight loss program. Participants recorded everything they ate using a mobile app and weighed themselves daily with a wireless scale.
The analysis focused on the first 12 weeks of the program. This period is typically the period in which participants are most engaged and provide the most accurate data about their eating habits.
Measuring calorie consistency and meal repetition
The researchers used two measures to assess how each participant’s diet was structured. One is calorie stability, which looks at how much your daily calorie intake changes from day to day and between weekdays and weekends. The second was meal repetition, which tracked how often participants recorded the same meal or snack rather than choosing new foods on a regular basis.
Improved consistency leading to better results
Participants who ate the same foods frequently lost an average of 5.9% of their weight, while those who ate a wider variety of foods lost 4.3%. More consistent caloric intake was also associated with greater weight loss. Each 100 calorie increase in daily variation reduced weight loss by approximately 0.6% over the study period.
These results suggest that simplifying food choices, such as meal rotations and keeping calorie intake consistent, may help people develop habits that are easier to maintain. However, the researchers note that the results show a correlation rather than cause and effect, and that factors such as motivation and self-control may also influence the results.
Rethinking diversity in modern diets
The researchers also note that previous studies have linked dietary diversity to improved overall health. However, these findings typically focus on diversity within healthy food groups such as fruits and vegetables.
“If we lived in a healthier food environment, we might encourage people to eat as diverse a diet as possible,” Hagerman says. “But the modern food environment is too problematic. Instead, people may do best with more repetitive meals that help them consistently make healthier choices, even at the expense of some nutritional diversity.”
Weekend tracking and unexpected results
Additional findings showed that participants who reported higher total calories on weekends than on weekdays also lost more weight. Hagerman explained that this likely reflects more consistent tracking rather than increased food intake, as people often record their meals less reliably over the weekend.
Overall, the point is clear. When it comes to weight loss, consistency in your eating habits may be more important than dietary variety.
