Effects of recumbency and space flight on bone density.
D000328:Adult; D001842:Bone and Bones / Q000000981:diagnostic imaging / Q000378:metabolism*; D002118:Calcium / Q000378:metabolism*; D002136:Calcium, Dietary / Q000378:metabolism; D003720:Densitometry; D005528:Foot / Q000000981:diagnostic imaging; D006225:Hand / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D011187:Posture; D011859:Radiography; D012146:Rest; D013026:Space Flight
D002136:Calcium, Dietary; D002118:Calcium