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| Research article summary (published 30 Sep 2008): |
Mental and physical fatigue-related biochemical alterations.
Full Abstract
OBJECTIVE: To confirm fatigue-related biochemical alterations, we measured various parameters just before and after relaxation and fatigue-inducing mental or physical sessions. METHODS: Fifty-four healthy volunteers were randomized to perform relaxation and fatigue-inducing mental and physical sessions for 4 h in a double-blind, three-crossover design. Before and after each session, subjects were asked to rate their subjective sensations of fatigue, and blood, saliva, and urine samples were taken. RESULTS: After the fatigue-inducing mental and physical sessions, subjective scores of fatigue were increased. After the fatigue-inducing mental session, the vanillylmandelic acid level in urine was higher and plasma valine level was lower than after the relaxation session. In contrast, after the fatigue-inducing physical session, serum citric acid, triacylglycerol, free fatty acid, ketone bodies, total carnitine, acylcarnitine, uric acid, creatine kinase, aspartate aminotransferase, lactate dehydrogenase, cortisol, dehydroepiandrosterone, dehydroepiandrosterone sulfate, plasma branched-chain amino acids, transforming growth factor-beta1 and -beta2, white blood cell and neutrophil counts, saliva cortisol and amylase, and urine vanillylmandelic acid levels were higher and serum free carnitine and plasma total amino acids and alanine levels were lower than those after the relaxation session. CONCLUSION: Some mental or physical fatigue-related biochemical changes were determined. Various biochemical alterations reflecting homeostatic perturbation and its responses might be shown. We believe that our results contribute to clarifying the mechanism of fatigue, developing evaluation methods, and establishing a basis for treatment.
Author information
Author/s: Nozaki, Satoshi (S); Tanaka, Masaaki (M); Mizuno, Kei (K); Ataka, Suzuka (S); Mizuma, Hiroshi (H); Tahara, Tsuyoshi (T); Sugino, Tomohiro (T); Shirai, Tomoko (T); Eguchi, Asami (A); Okuyama, Kaori (K); Yoshida, Kaoru (K); Kajimoto, Yoshitaka (Y); Kuratsune, Hirohiko (H); Kajimoto, Osami (O); Watanabe, Yasuyoshi (Y);
Affiliation: Department of Physiology, Osaka City University Graduate School of Medicine, Osaka, Japan. satoshi.nozaki(-atsign-)hotmail.co.jp
Journal and publication information
Publication Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't
Journal: Nutrition (Burbank, Los Angeles County, Calif.) (Nutrition), published in United States. (Language: eng)
Reference: 2009-Jan; vol 25 (issue 1) : pp 51-7
Dates: Created 2008/12/08; Completed 2009/03/10;
PMID: 18834718, status: MEDLINE (last retrieval date: 3/10/2009, IMS Date: 10 Mar 2009 00:00:00)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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