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Document ID (ISN)101131
CIS number 03-174
ISSN - Serial title 1076-2752 - Journal of Occupational and Environmental Medicine
Year 2000
Convention or series no.
Author(s) O'Toole M.L., Johnson K.C., Satterfield S., Bush A.J., Koo W.W.K., Klesges R.C., Applegate W.B.
Title Do sweat calcium losses affect bone mass during firefighter training?
Bibliographic information Nov. 2000, Vol.42, No.11, p.1054-1059. 36 ref.
Abstract Although vigorous exercise is associated with increased bone mass, recent evidence suggests that loss of calcium in sweat may result in a negative calcium balance and, ultimately, a decrease in bone mass. Anthropometric characteristics, habitual physical activity levels, dietary calcium intake, bone mineral content and bone turnover markers were measured in 42 male firefighter recruits before and after four months of training. During two strenuous mid-training sessions, calcium loss in sweat was measured. At the end of the training period, it was found that bone mineral content increased significantly, as did one marker of bone formation, and were not associated with sweat calcium concentration. This study demonstrates that intense physical exercise that produces high sweat rates do not have an adverse effect on the bone mineral content of healthy young men.
Descriptors (primary) fire fighting; bone mineral density; calcium; physical training; sweat secretion during effort
Descriptors (secondary) male workers; bone structure; anthropometry; physical fitness
Document type D - Periodical articles
Country / State or ProvinceUSA
Subject(s) Toxic and dangerous substances
Broad subject area(s) Occupational medicine, epidemiology
Browse category(ies) Fires
Inorganic substances
Heat and cold