Kids need recess and/or PE, and they need time outdoors, for physical health and mental well-being, but our culture increasingly wants to box them in and sit them down. There are proponents of change, however, and even a notable movement around outdoor education at the pre-K level and kindergarten levels. I’ve written about both these topics:

Why PE Should Be Required from Kindergarten to College

The Nature of Learning: Why Kids Need to Get Outside More

Hope that helps, and thanks for the comments and questions.