Elastic recoil of the lungs and chest wall?

It says in my textbook that the work of breathing overcomes the elastic recoil of the lungs as well as the elastic recoil of the chest walls. I understand that the elastic recoil of the lungs is inwards (casuing lungs to collapse) which must be overcome to expand them. However why does work need to be done to overcome the elastic recoil of the chest walls?