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THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS
Rivista di Medicina, Traumatologia e Psicologia dello Sport
Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
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ORIGINAL ARTICLES OTHER AREAS
(Biochemistry, Immunology, Kinanthropometry, Neurology, Neurophysiology, Ophtalmology, Pharmacology, Phlebology, etc.)
The Journal of Sports Medicine and Physical Fitness 2011 Settembre;51(3):525-32
Effect of aerobic exercise on insulin, insulin-like growth factor-1 and insulin-like growth factor binding protein-3 in overweight and obese postmenopausal women
Wieczorek-Baranowska A. 1, Nowak A. 1, Michalak E. 1, Karolkiewicz J. 1, Pospieszna B. 1, Rutkowski R. 2, Laurentowska1 M., Pilaczyńska-Szcześniak L. 1 ✉
1 Biochemistry and Hygiene, University School of Physical Education, Poznań, Poland;
2 Department of Physiotherapy, University School of Physical Education, Poznań, Poland
AIM:The purpose of presented study was to verify the influence of aerobic physical activity program on the serum insulin, insulin-like growth factor-1 (IGF-1) and insulin-like growth factor binding protein-3 (IGFBP-3) concentrations in overweight and obese postmenopausal women.
METHODS: Somatic parameters and serum concentrations of insulin, IGF-1 and IGFBP-3 were measured in 21 overweight and obese women, before and after 8-week cycloergometer physical workout and 16 age-matched, controls. Age of all studied women ranged from 54 to 78 years.
RESULTS:The comparative analysis of biochemical indices measured before and after the training program showed that the systematic exercise cause the significant decrease in insulin (P<0.05) and IGF-1 concentrations (P<0.05). There were no differences in these parameters in controls over the studied period. The level of IGFBP-3 was not significantly changed in both investigated groups. In women participating in the training program the positive correlation (P<0.05) between changes in IGF-1 levels (Δ) and changes in insulin concentrations (Δ) within two terms of the study were found. The magnitude of changes (Δ) in insulin and IGF-1 levels over the study period correlated with their concentrations measured before the training program (P<0.01).
CONCLUSION:Results of the present study indicate that regular aerobic physical activity decreases serum insulin and IGF-1 levels in postmenopausal women. The magnitude of insulin and IGF-1 concentration changes depend on their initial levels. Changes of IGF-1 levels are associated with insulin concentration modifications.