Document Detail

Lactation performance of exercising women.
MedLine Citation:
PMID:  2360539     Owner:  NLM     Status:  MEDLINE    
To determine whether vigorous exercise affects lactation performance, we compared well-nourished exercising (n = 8) and sedentary (n = 8) women whose infants were 9-24 wk old and exclusively breast-fed. Measurements included resting metabolic rate (RMR); maximum oxygen consumption (VO2max); plasma prolactin, cortisol, insulin, and T3; and body composition. Each subject completed a 3-d record of dietary intake, physical activity, and milk volume (by test weighing) and collected 24-h milk samples. Exercising women differed significantly from control subjects in VO2max (46.4 vs 30.3, percent body fat (21.7 vs 27.9%), total energy expenditure (3169 vs 2398 kcal/d), and energy intake (2739 vs 2051 kcal/d). There was no difference between the groups in plasma hormones or milk energy, lipid, protein, or lactose content. Exercising subjects tended to have higher milk volume (839 vs 776 g/d) and energy output in milk (538 vs 494 kcal/d). Thus, there was no apparent adverse effect of vigorous exercise on lactation performance.
C A Lovelady; B Lonnerdal; K G Dewey
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The American journal of clinical nutrition     Volume:  52     ISSN:  0002-9165     ISO Abbreviation:  Am. J. Clin. Nutr.     Publication Date:  1990 Jul 
Date Detail:
Created Date:  1990-08-01     Completed Date:  1990-08-01     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0376027     Medline TA:  Am J Clin Nutr     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  103-9     Citation Subset:  AIM; IM    
Department of Nutrition, University of California, Davis 95616.
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MeSH Terms
Basal Metabolism / physiology
Body Composition
Breast Feeding
Energy Intake / physiology
Energy Metabolism
Exercise / physiology*
Hormones / blood
Lactation / physiology*
Milk, Human / analysis*
Oxygen Consumption
Grant Support
Reg. No./Substance:

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