| Glycogen resynthesis and exercise performance with the addition of fenugreek extract (4-hydroxyisoleucine) to post-exercise carbohydrate feeding. | |
| | |
MedLine Citation:
|
PMID: 17710365 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The purpose of this study was to determine the effect of adding fenugreek extract (FG) to post-exercise carbohydrate feeding on glycogen resynthesis and subsequent exercise performance in normoglycemic male endurance athletes. A muscle biopsy sample was obtained from the vastus lateralis from subjects prior to exercise for 5 h at 50% of peak cycling power (52.1 +/- 3.3% of VO(2) peak). A second muscle biopsy sample was obtained immediately after exercise. Immediately after and 2 h after the second biopsy subjects ingested either an oral dose of dextrose (GLU) (1.8 g x kg BW(-1)) or GLU with FG containing 1.99 +/- 0.20 mg x kg(-1) 4-hydroxyisoleucine (GLU + FG) in a randomized, cross-over, double blind design. At 4 h post-exercise a third biopsy was taken and subjects received a standardised meal along with FG or a placebo capsule. At 15 h post-exercise subjects underwent their final muscle biopsy before completing a simulated 40 km cycling time trial. There was no difference in muscle glycogen at any time between GLU and GLU + FG. Additionally, 40 km time trial performance was similar for average power output (221 +/- 28 vs. 213 +/- 16 watts) and for time to completion (69.7 +/- 3.7 vs. 70.5 +/- 2.2 min) for the GLU and GLU + FG, respectively. Despite earlier data to the contrary, the present results do not support an effect of fenugreek supplementation on glycogen resynthesis, even though this may have been the result of differences in experimental protocol. |
| | |
Authors:
|
D Slivka; J Cuddy; W Hailes; S Harger; B Ruby |
Related Documents
:
|
3203675 - Prolonged submaximal exercise and l-carnitine in humans. 8213615 - The influence of fructose feeding on physical performance. 12456845 - Dissociation between muscle tricarboxylic acid cycle pool size and aerobic energy provi... 2730575 - Glucose formation in human skeletal muscle. influence of glycogen content. 15292745 - Single sessions of intermittent and continuous exercise and postprandial lipemia. 6704385 - Alterations in liver mitochondrial function as a result of fasting and exhaustive exerc... |
Publication Detail:
|
Type: Journal Article Date: 2007-08-21 |
Journal Detail:
|
Title: Amino acids Volume: 35 ISSN: 1438-2199 ISO Abbreviation: Amino Acids Publication Date: 2008 Aug |
Date Detail:
|
Created Date: 2008-08-15 Completed Date: 2008-10-09 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9200312 Medline TA: Amino Acids Country: Austria |
Other Details:
|
Languages: eng Pagination: 439-44 Citation Subset: IM |
Affiliation:
|
Health and Human Performance Laboratory, The University of Montana, Missoula, MT 59812-1825, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Amino Acids / administration & dosage Blood Glucose / analysis, drug effects Dietary Carbohydrates / administration & dosage* Exercise* Glycogen / analysis, biosynthesis* Humans Isoleucine / administration & dosage, analogs & derivatives* Male Muscle, Skeletal / chemistry, drug effects, metabolism Plant Extracts / administration & dosage* Seeds / chemistry Trigonella / chemistry* |
| Chemical | |
Reg. No./Substance:
|
0/4-hydroxyisoleucine; 0/Amino Acids; 0/Blood Glucose; 0/Dietary Carbohydrates; 0/Plant Extracts; 73-32-5/Isoleucine; 9005-79-2/Glycogen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Estimating residue evolutionary conservation by introducing von Neumann entropy and a novel gap-trea...
Next Document: Screening for maternal depression in a low education population using a two item questionnaire.