Altitude Training and Adaptations to the Cardiovascular System
Tue, Sep 2 2008 05:52 PM
| Health
The major effects of acute hypoxia on the heart have been well demonstrated in the scientific literature. Hypoxia directly affects the vascular tone of the systemic resistance vessels with an increased ventilation and sympathetic activity via stimulation of the peripheral chemoreceptors. Interactions occur between the direct effects of hypoxia on blood vessels and the chemoreceptor-mediated
The effects of normobaric hypoxic preadaption on bone electrical properties and bone composition in hypokinetic rats
Wed, Jun 25 2008 05:45 AM
Levashov O.M., Saphonov S.L., Levashov M.l.A.A. Bogomoletz institute of physiology Nationall Academy of Sciences, Kiev, Ukraine, email: levashov@biph.kiev.uaThe purpose of this study was to determine if the preadaptation to hypoxia would prevent the damage of the compact bone tissue in hypokinetic rats. The objects of the study were femoral bones of 36 mail Wistar rats. The were 3 groups of rats:
Exercise training in normobaric hypoxia in endurance runners
Wed, Jun 25 2008 04:49 AM
Part 1 of this study investigates whether a 6-wk intermittent hypoxia training (IHT), designed to avoid reductions in training loads and intensities, improves the endurance performance capacity of competitive distance runners. Part 2 investigates whether adaptations of mitochondrial function accompany the improvement of endurance performance capacity observed in well-trained athletes after an
Altitude Training for Elite Athletes
Wed, Jun 25 2008 04:36 AM
| Sports Performance
Altitude training has become a training modality that has become very popular and efficacious among endurance athletes. Its use now has become also very popular amongst power athletes. Athletes do respond very differently to acute altitude exposure and altitude training regimes. The genetic make-up of each individual athlete tailor makes each individual response. There are individual differences
Essentials in the diagnosis of acid-base disorders and their high altitude application
Wed, Jun 25 2008 04:05 AM
P.E. Paulev, G.R. Zubieta-Calleja.Institute of Medical Physiology, The Panum Institute, University of Copenhagen, Denmark;The High Altitude Pathology Institute, La Paz, Bolivia.This report describes the historical development in the clinical application of chemical variables for the interpretation of acid-base disturbances. The pH concept was already introduced in 1909. Following World War II,
Hypoxia Upregulates Glucose Transport Activity Through an Adenosine-Mediated Increase of GLUT1 Expression in Retinal Capillary Endothelial Cells
Wed, Jun 25 2008 03:57 AM
Hitoshi Takagi, George L. King, and Lloyd Paul AielloElevation of intracellular glucose within retinal vascular cells is believed to be an important causal factor in the development of diabetic retinopathy. The intracellular glucose concentration is regulated by both the rate of glucose metabolism and glucose transport. Because retinal hypoxia often precedes proliferative diabetic retinopathy, we
Adrenergic receptor antagonism abrogates cardioprotective effects of intermittent hypoxia
Wed, Jun 25 2008 03:46 AM
Robert T. Mallet PHD, Myoung-Gwi Ryou, Arthur G. Williams Jr., Linda Howard, H. Fred Downey.Department of Integrative Physiology, University of North Texas Health Science Center, 3500 Camp Bowie Boulevard, Fort Worth, TX 76107-2699, USA.Abstract:Adaptation to hypoxia lessens myocardial ischemic injury. This study tested whether hypoxia-induced b-adrenergic activity mobilizes mechanisms that
Hypoxia stimulates glucose transport in insulin-resistant human skeletal muscle
Wed, Jun 25 2008 03:31 AM
JL Azevedo, JO Carey, WJ Paries, PG Morris and GL Dohm.Department of Biochemistry, School of Medicine, East Carolina University, Greenville, NC, USA.Diabetes 44:695-698, 1995Insulin and muscle contraction stimulate glucose transport into muscle cells by separate signaling pathways, and hypoxia has been shown to operate via the contraction signaling pathway. To elucidate the mechanism of insulin
Cardioprotective Adaptations to Intermittent Hypoxia
Wed, Jun 25 2008 03:09 AM
Robert T. Mallet, Ph.D., Myoung-Gwi Ryou, M.S., Arthur G. Williams, Jr., Linda L. Howard, H. Fred Downey, Ph.D.Department of Integrative Physiology, University North Texas, Health Science Center, Fort Worth, Texas, USA.The following information was presented in a powerpoint presentation:• Beta-adrenergic signaling and hypoxia-induced cardioprotection• Adaptation to intermittent hypoxia suppresses