A bill intended to prevent obesity among Maine schoolchildren will be up for debate in the state Senate. It would require students from kindergarten to Grade 5 to participate in a minimum of 30 minutes of daily physical activity at school. Teachers could restrict a student’s participation in physical activity if it presents a danger to the student or to others. The state Education Department took a neutral stand on the bill. The Maine School Nutrition Association supported it, saying that the focus of obesity prevention so far has been food and that the bill starts to address the role of physical activity, as well.