Hormonal Response to Incremental and Continuous Exercise in Cyclists with Left Ventricle Hypertrophy

Journal of Human Kinetics
Rafał MikołajczykAleksandra Żebrowska

Abstract

The aim of this study was to assess the effects of incremental and continuous exercise on the concentration of insulin-like growth factor-1 (IGF-1), growth hormone (GH), testosterone (T), and cortisol (C), as well as to investigate whether increased cardiac dimensions in cyclists were related to changes in these hormones and cardiac biomarkers. The study included 30 elite cyclists divided into two groups, i.e., athletes with left ventricle hypertrophy (a LVH group), and a control group (CG) without LVH. The study protocol included performance of a standard incremental exercise (IncEx) test to measure athletes' maximum power (Pmax), maximum oxygen uptake (VO2max), and lactate threshold (LAT). The IncEx test results were then used to determine the intensity of the continuous exercise (ConEx) test which was performed after the 1-week washout period. Cyclists with LVH and without LVH did not differ in resting hormone concentrations and cardiac biomarkers levels. There was a significant effect of exercise on serum IGF-1 levels (p < 0.05) in the LVH group and a combined effect of the type of exercise and LVH on IGF-1 (p < 0.05). Cyclists with LVH demonstrated higher post exercise T levels recorded in response to exercise compared to ...Continue Reading

References

Apr 15, 1987·The American Journal of Cardiology·D LevyW P Castelli
Feb 24, 2001·Medicine and Science in Sports and Exercise·B MettauerJ Lonsdorfer
Jan 29, 2003·Growth Hormone & IGF Research : Official Journal of the Growth Hormone Research Society and the International IGF Research Society·M ScheinowitzM Eldar
Sep 5, 2003·Experimental Physiology·Sanjay Sharma
Apr 16, 2004·Heart·J R PayneH E Montgomery
Apr 29, 2006·Journal of Cardiovascular Medicine·Antonio Pelliccia, Paul D Thompson
Jul 14, 2010·Journal of the American College of Cardiology·Rob ShavePaul D Thompson
May 7, 2011·International Journal of Sports Medicine·L E Carranza-GarcíaA Legaz-Arrese
Dec 22, 2012·Nature Reviews. Molecular Cell Biology·Marjorie MailletJeffery D Molkentin
May 28, 2013·BMC Research Notes·Enrique Serrano OstarizAlejandro Legaz Arrese
Jan 2, 2014·Trends in Endocrinology and Metabolism : TEM·Rodrigo TroncosoSergio Lavandero
Jul 18, 2014·Journal of Human Kinetics·Grażyna JanikowskaMagdalena Kimsa
Jun 6, 2016·European Journal of Applied Physiology·Travis AndersonAnthony C Hackney
Jun 28, 2016·Frontiers of Hormone Research·Anthony C HackneyAmy R Lane
May 4, 2017·Cell Metabolism·Rick B VegaLeslie A Leinwand

❮ Previous
Next ❯

Software Mentioned

Statistics Package
Excel

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.