Universität zu Köln

Koehler, Karsten ORCID: 0000-0002-9618-2069, Huelsemann, Frank, de Marees, Markus, Braunstein, Bjoern ORCID: 0000-0002-5173-8916, Braun, Hans and Schaenzer, Wilhelm (2011). Case Study: Simulated and Real-Life Energy Expenditure During a 3-Week Expedition. Int. J. Sport Nutr. Exerc. Metab., 21 (6). S. 520 - 527. CHAMPAIGN: HUMAN KINETICS PUBL INC. ISSN 1526-484X

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Abstract

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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Koehler, Karsten UNSPECIFIED orcid.org/0000-0002-9618-2069 UNSPECIFIED Huelsemann, Frank UNSPECIFIED UNSPECIFIED UNSPECIFIED de Marees, Markus UNSPECIFIED UNSPECIFIED UNSPECIFIED Braunstein, Bjoern UNSPECIFIED orcid.org/0000-0002-5173-8916 UNSPECIFIED Braun, Hans UNSPECIFIED UNSPECIFIED UNSPECIFIED Schaenzer, Wilhelm UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-484279
DOI:	10.1123/ijsnem.21.6.520
Journal or Publication Title:	Int. J. Sport Nutr. Exerc. Metab.
Volume:	21
Number:	6
Page Range:	S. 520 - 527
Date:	2011
Publisher:	HUMAN KINETICS PUBL INC
Place of Publication:	CHAMPAIGN
ISSN:	1526-484X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ENDURANCE EXERCISE; BODY-COMPOSITION; LABELED WATER; HIGH-ALTITUDE; PERFORMANCE; NUTRITION; GREENLAND; BALANCE; LIMITS Multiple languages Nutrition & Dietetics; Sport Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/48427