Elementary and Middle School-Aged Students with Longer Seated Lunch Time Eat More Fruits and Vegetables
Abstract Objectives Health advocates recommend 20 minutes of seated lunch time. Yet, no federal policy ensures adequate time for school lunch across the US. The objective of this study is to assess the impact of meeting the 20-minute seated lunch time recommendation on child food consumption and waste. Methods Using a crossover design, seated lunch time was randomly assigned each day to be either 10 or 20 minutes. Menus conformed to the National School Lunch Program nutrition standards and were matched to short and long lunch days to control for menu. Elementary and middle school-aged students attending a university summer camp participated in the study. Children could enroll in 1 to 4 weeks of the camp and had varying lengths of participation in the study. Researchers weighed individual child meals to assess consumption and waste. Mixed models assessed the differences in food consumption and waste between students with greater or less than 20 minutes of seated lunch time, accounting for repeated measures and menus. Results A total of 38 students participated (mean: 10.9 years old, 60.5% female) and attended 6.3 study days on average. Students with less than 20 minutes of seated lunch time consumed on average 8.4% less (P = 0.010) of their selected fruit and 11.5% (P = 0.006) less of their selected vegetable compared to students with at least 20 minutes. For each additional minute of seated lunch time, student consumption of fruit increased on average 0.9% (P = 0.003) while vegetable consumption increased on average 1.3% (P = 0.001). Student consumption of entree items and milk did not significantly differ across short and long lunches. Conclusions These findings suggest that shorter lunch periods differentially impact rates of child fruit and vegetable consumption, as compared to entree and beverage consumption. These results also support policies requiring 20 minutes of seated lunch time to improve child diet quality and reduce food waste. Funding Sources This research was funded from a United States Department of Agriculture HATCH award.