| Case study: simulated and real-life energy expenditure during a 3-week expedition. | |
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MedLine Citation:
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PMID: 22089310 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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During prolonged periods of high energy expenditure (EE), restricted food intake can lead to a loss of body mass. This case study describes the preexpedition support for an unsupported 3-wk crossing of the Atacama Desert in Chile. The goals were to simulate the energy requirements of walking under varying conditions and to predict energy intake and EE to evaluate whether the expected weight loss was in acceptable limits. The expeditionist (male, 35 yr, 197 cm, basal weight 80 ± 0.5 kg) was a well-trained endurance athlete with experience of multiple expeditions. During the simulation, he walked on a treadmill at speeds of 2-7 km/hr under varying conditions of inclination (0%, 7.5%), backpack weight (0 kg, 30 kg), and altitude (sea level, simulated altitude of 3,500 m). Under all conditions, the lowest EE was observed at 5 km/ hr. Based on the simulation data, we predicted an average EE of 4,944 kcal/day for the expedition. Because energy intake was restricted to 2,249 kcal/day, we expected the expeditionist to lose considerable weight and consequently advised him to gain 5 kg of body-fat reserves. During the actual desert crossing, he covered a distance of 26 ± 7 km/day at an average speed of 3.8 ± 0.4 km/hr. Daily EE (4,817 ± 794 kcal/day) exceeded energy intake (1,771 ± 685 kcal/day), and the negative energy balance was in agreement with the actual weight loss of 10.5 kg, which was most notable in the lower trunk. |
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Authors:
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Karsten Koehler; Frank Huelsemann; Markus de Marees; Bjoern Braunstein; Hans Braun; Wilhelm Schaenzer |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: International journal of sport nutrition and exercise metabolism Volume: 21 ISSN: 1543-2742 ISO Abbreviation: Int J Sport Nutr Exerc Metab Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-11-17 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100939812 Medline TA: Int J Sport Nutr Exerc Metab Country: United States |
Other Details:
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Languages: eng Pagination: 520-6 Citation Subset: IM |
Affiliation:
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Inst. of Biochemistry, the German Research Center of Elite Sport, German Sport University Cologne, Cologne, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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