title: Sitting, muscular exercises, and collagen metabolism in tetraplegia.
mesh_terms: D000293:Adolescent; D000328:Adult; D001862:Bone Resorption / Q000209:etiology; D002118:Calcium / Q000652:urine; D003094:Collagen / Q000378:metabolism*; D006801:Humans; D006909:Hydroxyproline / Q000652:urine; D008297:Male; D010024:Osteoporosis / Q000209:etiology; D005082:Physical Exertion; D011187:Posture; D011782:Quadriplegia / Q000150:complications / Q000503:physiopathology*; D012146:Rest; D014910:Wheelchairs
chemical_list: D003094:Collagen; D006909:Hydroxyproline; D002118:Calcium