TY - BOOK AU - Eman Wagdy Mahmoud AU - Aly Saad Rafea , AU - Elham Elsayed Salem , TI - Effect of different backpack loading from standing on ventilatory functions for primary school Egyptian children / PY - 2011/// CY - Cairo : PB - Eman Wagdy Mahmoud , KW - Backpack KW - Loads KW - Ventilatory functions N1 - Thesis (M.Sc.) - Cairo University - Faculty of Physical Therapy - Department of Growth and Development Disorders in Pediatrics; Issued also as CD N2 - Investigate the effect of shoulder girdle loading with different loads on ventilatory functions in primary school children. Two hundred and fifty primary school children aged between 8 to 12 years underwent spirometry measurements while adopting the following four conditions This study demonstrates a restrictive effect on ventilatory functions when a school bag is heavier than 20% of a child`s body weight UR - http://172.23.153.220/th.pdf ER -