| Gradual and rapid weight loss: effects on nutrition and performance in male athletes. | |
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MedLine Citation:
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PMID: 8455453 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We studied seven male wrestlers and three judo athletes (weight 55-93 kg) during two weight reductions. In the "gradual" procedure (GP), a 5.0 +/- 0.4% (mean +/- SEM) weight loss was achieved in 3 weeks by energy restriction. In the "rapid" procedure (RP), 6.0 +/- 0.6% of body weight was lost in 2.4 days by fluid and diet restriction and forced sweating, and followed by a 5-h "loading" (food and drinks ad libitum). The net weight loss after GP and loading was 2.7 +/- 0.5%. Protein intakes (4-d food records) during GP and RP were 71 +/- 16 and RP 56 +/- 17 g.d-1, respectively. Carbohydrate intakes were 239 +/- 56 (GP) and 182 +/- 55 g.d-1 (RP). During GP and RP, mean thiamin, magnesium, and zinc intakes were at or below the respective recommendation. Thiamin, riboflavin, potassium, iron, and zinc status, assessed from blood chemistry, remained stable during both procedures. Changes in vitamin B6 indicator (E-ASTAC) and S-magnesium concentration were different (P < 0.01) between the procedures, suggesting negative trends during GP. Sprint (30-m run) and anaerobic (1-min Wingate test) performance was similar throughout the study. Following GP, vertical jump height with extra load increased by 6-8% (P < 0.01). Jumping results were not affected by RP. Hence, < or = 5% loss in body weight by either method did not impair experienced athletes' performance. |
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Authors:
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G M Fogelholm; R Koskinen; J Laakso; T Rankinen; I Ruokonen |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 25 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 1993 Mar |
Date Detail:
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Created Date: 1993-04-20 Completed Date: 1993-04-20 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 371-7 Citation Subset: IM; S |
Affiliation:
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Department of Applied Chemistry and Microbiology, University of Helsinki, Finland. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Aspartate Aminotransferases / blood Diet, Reducing / methods* Dietary Carbohydrates Drinking Eating Energy Intake Energy Metabolism Ergometry Food Deprivation Glutathione Reductase / blood Humans Magnesium / blood Male Martial Arts Minerals / blood Nutrition Assessment Nutritional Physiological Phenomena / physiology* Nutritional Status / physiology Physical Fitness* Psychomotor Performance Pyridoxine / blood, metabolism Sports* Time Factors Transketolase / blood Vitamins / blood Water Deprivation Weight Gain Weight Loss / physiology* Wrestling |
| Chemical | |
Reg. No./Substance:
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0/Dietary Carbohydrates; 0/Minerals; 0/Vitamins; 65-23-6/Pyridoxine; 7439-95-4/Magnesium; EC 1.8.1.7/Glutathione Reductase; EC 2.2.1.1/Transketolase; EC 2.6.1.1/Aspartate Aminotransferases |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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