The timing and length of your children’s lunch and recess during school can affect their food and exercise habits, according to a new study from the University of Illinois, Urbana-Champaign. Most research up until now has focused on nutritional intake or physical activity during recess separately, but this is the first study to measure how they are interrelated. This study helps to shed some light on the influence of lunch scheduling on both physical activity during recess and food choices made by children at lunchtime. For a span of five days, researchers assessed the physical activity and lunch food choices of 151 fourth and fifth grade students from two low-income schools. Their lunch intake was measured using a weighted plate waste technique captured by digital photography. Their physical activity during recess was measured using accelerometry, a tool that evaluates movement. Each school scheduled lunch either just before or immediately after recess.

The researchers found that:
- Although less food was wasted when recess was held before lunch, children ate more vegetables when lunch was offered before recess.
- When children had a longer time for a combined lunch and recess period, they were proportionally more physically active when lunch was offered before recess.
- When the lunch-recess period was shorter, children were more active when recess was offered before lunch.