Abstract
Background and objectivesThe portion size of food is a determinant of energy intake, linking with obese traits. A healthy plate for portion control has recently been made in a Japanese style. The aim of the current study was to assess the efficacy of a lifestyle intervention program using the Japanese-style healthy plate on weight reduction in overweight and obese diabetic Japanese subjects.MethodsWe randomized overweight and obese diabetic subjects (n = 19, 10 women) into an intervention group including educational classes on lifestyle modification incorporating the healthy plate (n = 10) or a waiting-list control group (n = 9). The intervention period was three months, and the educational classes using the healthy plate were conducted monthly in a group session for the intervention group. The body weight, blood glycemic and metabolic measures, and psychosocial variables were measured at the baseline and after the 3-month intervention in both groups. The impression of the intervention was interviewed using a structured questionnaire.ResultsThere was one drop-out in the control group. No adverse events were reported in the groups. Subjects in the intervention group had a greater weight change from baseline to the end of the 3-month intervention period (-3.7 +/- 2.5 [SD] kg in the intervention group vs. -0.1 +/- 1.4 kg in the control group, P = 0.002). Most subjects recorded that the use of a healthy plate could be recommended to other people.ConclusionsThe lifestyle intervention program using the Japanese-style healthy plate, which was developed for portion control, may effectively reduce body weight in overweight and obese diabetic subjects in Japan. Further studies are needed to establish the efficacy of this methodology on weight management.
Highlights
Background and objectivesThe portion size of food is a determinant of energy intake, linking with obese traits
The hemoglobin A1c (HbA1c) level was reduced after intervention in the intervention group, the changes in HbA1c levels did not significantly differ between the intervention and control groups
The other variables did not show any significant difference between the intervention and control groups
Summary
The portion size of food is a determinant of energy intake, linking with obese traits. A healthy plate for portion control has recently been made in a Japanese style. The aim of the current study was to assess the efficacy of a lifestyle intervention program using the Japanese-style healthy plate on weight reduction in overweight and obese diabetic Japanese subjects. A plate is a flat and round dish that Japanese people often use at mealtimes; a plate can be used as a tool for dietary intervention. Plates for portion control have been used in previous studies [6,7]; the plates were made for western-style dishes. A wide variety of fish, squid, octopus, eel, and shellfish appear in all kinds of dishes from sushi to tempura [12,13]
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