NDLI: Relationships between contraction properties of knee extensor muscles and fasting IGF-1 and adipocytokines in physically active postmenopausal women.

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Relationships between contraction properties of knee extensor muscles and fasting IGF-1 and adipocytokines in physically active postmenopausal women.

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Relationships between contraction properties of knee extensor muscles and fasting IGF-1 and adipocytokines in physically active postmenopausal women.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Jürimäe, Toivo Pääsuke, Mati Kums, Tatjana Gapeyeva, Helena Ereline, Jaan Saar, Meeli Jürimäe, Jaak
Spatial Coverage	Estonia
Description	Country affiliation: Estonia Author Affiliation: Jürimäe T ( Institute of Sport Pedagogy and Coaching Sciences, Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Science, University of Tartu, Tartu, Estonia. toivo.jurimae@ut.ee)
Abstract	The aim of this cross-sectional study was to find possible relationships between insulin-like growth factor-1 (IGF-1), adipocytokines (leptin and adiponectin) and twitch contraction (TC) characteristics of the knee extensor (KE) muscles in healthy physically active postmenopausal women (n = 28, 64-78 years old). We hypothesized that IGF-1 is related at least to isometric TC peak torque (Pt) as the highest value of isometric torque production and maximal voluntary contraction (MVC) torque, and there will not be any relationships between TC characteristics and leptin and adiponectin. During the measurement of MVC torque and twitch contractile properties of KE muscles, the subjects sat in a custom-made dynamometric chair with the knee and hip angles equal to 90 degrees and 100 degrees, respectively. To assess the contractile properties of the KE muscles, electrically evoked isometric twitch was elicited by percutaneous electrical nerve stimulation. Serum leptin, adiponectin, IGF-1, insulin-like growth factor-binding protein-3 (IGFBP-3) and insulin were determined. There were a very few significant relationships between the measured muscle contractile parameters and fasting blood hormones. TC Pt correlated significantly with IGFBP-3 (r = 0.652, P = 0.001) and insulin (r = 0.495, P = 0.007). In conclusion, this study suggests that only TC peak torque correlated positively with serum fasting IGFBP-3 and insulin concentration. Adipocytokines leptin and adiponectin not correlated significantly with measured strength parameters in physically active postmenopausal women.
File Format	HTM / HTML
ISSN	14750961
Issue Number	5
Volume Number	30
e-ISSN	1475097X
Journal	Clinical Physiology and Functional Imaging
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2010-09-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Physiology Discipline Pathology Adipokines Blood Fasting Insulin-like Growth Factor I Analysis Isometric Contraction Muscle, Skeletal Physiology Physical Fitness Adiponectin Aged Biological Markers Cross-sectional Studies Electric Stimulation Estonia Female Humans Insulin Insulin-like Growth Factor Binding Protein 3 Insulin-like Growth Factor Binding Proteins Knee Leptin Middle Aged Muscle Strength Muscle Strength Dynamometer Innervation Postmenopause Torque Journal Article
Content Type	Text
Resource Type	Article
Subject	Physiology Physiology (medical)

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