What happens when physical education is integrated into the classroom curriculum?
Lower elementary students have a significant improvement in their ability to remember content from the classroom. This seems to be especially true for your younger students.
To learn more, you can read about the specifics here.
Upper Elementary students did on average two times better in memorization and six to eight times better in comprehension of the scientific method. Every class that had integrated PE did better than the control group.
“Movement, or physical activity,is thus an essential factor in intellectual growth, which depends upon the impressions received from outside. Through movement we come in contact with external reality, and it is through these contacts that we eventually acquire even abstract ideas.”