Journal of Applied Physiology Fuel your research with LabChart
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 84: 1768-1775, 1998;
8750-7587/98 $5.00
This Article
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Zhu, Y. I.
Right arrow Articles by Haas, J. D.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Zhu, Y. I.
Right arrow Articles by Haas, J. D.
Vol. 84, Issue 5, 1768-1775, May 1998

Altered metabolic response of iron-depleted nonanemic women during a 15-km time trial

Y. Isabel Zhu and Jere D. Haas

Division of Nutritional Sciences, Cornell University, Ithaca, New York 14853

In this double-blinded study, 37 women with iron depletion without anemia (age 19-36 yr) were randomly assigned to receive either an iron supplement (135 mg/day) or a placebo. Endurance capacity was assessed during a 15-km simulated time trial (TT) on a cycle ergometer before and after the 8-wk treatment. After the treatment, although the iron-supplemented group did not have shorter time to finish the TT (time), it had 2.0 kJ/min lower energy expenditure and 5.1% lower fractional utilization of peak oxygen consumption during the TT compared with the placebo group, after controlling for work rate (P < 0.05). Time, fractional utilization of peak oxygen consumption, and plasma lactate concentration at the 5th km of the TT were all negatively associated with hemoglobin levels, after controlling for work rate (P < 0.05). In conclusion, repletion of iron stores to women with iron depletion without anemia increased their energetic efficiency, and oxygen transport capacity of the blood was found to be an important determinant of endurance capacity and energy metabolism in nonanemic women.

hemoglobin; endurance; lactate; glucose; energy efficiency


This article has been cited by other articles:


Home page
 J Am Coll CardiolHome page
D. O. Okonko, A. Grzeslo, T. Witkowski, A. K.J. Mandal, R. M. Slater, M. Roughton, G. Foldes, T. Thum, J. Majda, W. Banasiak, et al.
Effect of Intravenous Iron Sucrose on Exercise Tolerance in Anemic and Nonanemic Patients With Symptomatic Chronic Heart Failure and Iron Deficiency: FERRIC-HF: A Randomized, Controlled, Observer-Blinded Trial
J. Am. Coll. Cardiol., January 15, 2008; 51(2): 103 - 112.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Clin. Nutr.Home page
J. C McCann and B. N Ames
An overview of evidence for a causal relation between iron deficiency during development and deficits in cognitive or behavioral function
Am. J. Clinical Nutrition, April 1, 2007; 85(4): 931 - 945.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Clin. Nutr.Home page
T. Brownlie IV, V. Utermohlen, P. S Hinton, and J. D Haas
Tissue iron deficiency without anemia impairs adaptation in endurance capacity after aerobic training in previously untrained women
Am. J. Clinical Nutrition, March 1, 2004; 79(3): 437 - 443.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Clin. Nutr.Home page
T. D Brutsaert, S. Hernandez-Cordero, J. Rivera, T. Viola, G. Hughes, and J. D Haas
Iron supplementation improves progressive fatigue resistance during dynamic knee extensor exercise in iron-depleted, nonanemic women
Am. J. Clinical Nutrition, February 1, 2003; 77(2): 441 - 448.
[Abstract] [Full Text] [PDF]

Home page
 J. Nutr.Home page
J. D. Haas and T. Brownlie IV
Iron Deficiency and Reduced Work Capacity: A Critical Review of the Research to Determine a Causal Relationship
J. Nutr., February 1, 2001; 131(2): 676S - 690.
[Abstract] [Full Text]

Home page
 J. Appl. Physiol.Home page
P. S. Hinton, C. Giordano, T. Brownlie, and J. D. Haas
Iron supplementation improves endurance after training in iron-depleted, nonanemic women
J Appl Physiol, March 1, 2000; 88(3): 1103 - 1111.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online