Recently published Letter to the Editor titled “Intermittent hypoxic training: risks versus benefits” (Hinghofer-Szalkay, 2010) suggested inquiring into the  long-term risks of Intermittent Hypoxic Training” (IHT), that is also called Therapeutic Hypoxia (TH). The letter points at potential risk of Reactive Oxygen Species (ROS) formation. From the biomedical point of view it is important to separate hazards associated with the use of a device / system and physiological risks and benefits of the therapy itself.

Undoubtfully, a device for human or animal treatments must be meeting essential requirements for medical devices e.g. electrical medical safety and electromagnetic compatibility (IEC 60601-1, 2007).

Devices and systems for hypoxia intervention are called “hypoxicators” and were recently suggested by Australian Therapeutic Goods Administration being mandatory regulated for all applications (TGA, 2008). Hypoxicator falls under the common definition of medical device because of it intended use e.g. “modification of physiological process” (Council Directive 93/42/EEC, 1993).

This letter is a brief review of physiological risks associated with the use of hypoxicators and IHT for human performance enhancement, in both athletic and sedentary populations.

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The outcomes of reside lower with sporadic subjection to hypoxia, train reduced instruction on efficiency of cyclists are discussed right here.

Ongoing subjection to natural elevation may increase complications for the hurt athlete as well as common recovery could get slowed. The endurance athlete has being provided accurate time periods of recovery following each and every stress workout. Numerous higher performing altitude training camps get the better of cyclists from climbing down to coast level to get high intensity training purpose.

The objective of height training plans is always to improve conditioning ranges in participants either by providing raises ranges of tension in the course of the training sessions or recovery or decreased amounts of stress.Bike riders who get involved within competition come across different training troubles when of working on altitude training. A smart rider or a trainer can be aware of timings of elevation training throughout the season in order that he or she might obtain optimum advantages out of the education plan.

A good fitness instructor has to accomplish bunch of analysis throughout the program with the altitude base exercising towards the best suited cyclist.

Typically the injured athletes might obtain more gains by working the simulated over sea riding because of better heart reply for decreased potential result.Every single physical education practice session induces variation from the rider for the environment and they accomplish the conditioning plateau. A well organized improve within the tension values with the strength exercising lead the rider to greater overall performance.The cyclist who is avoided from increased energy outputs at seaside degree can certainly work out at a high elevation to attain comparatively large core rates.

Better sea level performance may be as a result of elevated EPO release by filtering system, higher red cell mass and highest breathable air assimilation by muscle groups.Irregular hypoxic exposure does alter hematocrit, and alsoperformance during sleep, proving its effectiveness. Endurance training at increased altitudes raises the content level of blood cells and non-hematological results.Increase in plasma level (hemoconcentration) which happens next to the altitude training is incorrectly recognized for increased cellular size.

A note about EPO (Erythropoietin)

Treatments of EPO are unquestionably banned wordwide and result in thickening associated with bloodstream and even heart failure. Get better educated in relation to EPO before deciding these banned actions. Cyclists or runners will improve their overall performance by understanding a little more about complete book of road bike training

Scientists have done a lot of studies and written evaluations on altitude training being a approach supporting to different athletic divisions of sport science.

Advanced long distance runners, demonstrated better sea level efficiency by one.One percent, consequently of the week’s “live high, practice low” technique. Australian experts have detected better activities by “live high” technique with out any kind of increases in reddish colored blood cell mass or maybe increased air expire, realizing their thoughts and opinions that results is improved with height training which can be separate from breathable air expiration.Experts associated with this technique think this a clear placebo-handled device offers not been formed yet.

Concrete facts does not be found promoting the flexibility associated with irregular hypoxia exposure.Paperwork Accessible On Altitude Exercising. Another researcher stated the fact that professional sports researcher coming from Sydney have demostrated profound curiosity on that procedure that is a method associated with height exercise.In the year late 2001, the two scientists stated that the particular ,”live higher, train low” technique in elevation workouts was initially highly successful for athletes taking part in four hundred track race.Wilber published a couple of reviews reports about the evaluation of various high level exercising methods practiced by triathletes which represent diverse competitions. published obvious and evaluations about elevation training of which was go through and got achieved positive results by the riders and their trainers who took portion within world competitors.

SOURCE ]]> http://www.go2altitude.com/blog/index.php/2010/08/connection-involving-vo2max-and-altitude-training-in-cycling/feed/ http://www.go2altitude.com/blog/index.php/2010/07/altitude-preexposure-acclimatization/ http://www.go2altitude.com/blog/index.php/2010/07/altitude-preexposure-acclimatization/#comments Sat, 03 Jul 2010 10:03:10 +0000 admin http://www.go2altitude.com/blog/?p=305 Abstract
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Muza, Stephen R., Beth A. Beidleman, and Charles S Fuco. Altitude preexposure recommendations for inducing acclimatization. High Alt. Med.Biol. 11:87-92, 2010.-For many low-altitude (<1500 m) residents, their travel itineraries may cause them to ascend rapidly to high (>2400 m) altitudes without having the time to develop an adequate degree of altitude acclimatization. Prior to departing on these trips, low-altitude residents can induce some degree of altitude acclimatization by ascending to moderate >1500 m) or high altitudes during either continuous or intermittent altitude preexposures. Generally, the degree of altitude acclimatization developed is proportional to the altitude attained and the duration of exposure. The available evidence suggests that continuous residence at 2200m or higher for 1 to 2 days or daily 1.5- to 4-h exposures to >4000m induce ventilatory acclimatization. Six days at 2200m substantially decreases acute mountain sickness (AMS) and improves work performance after rapid ascent to 4300 m. There is evidence that 5 or more days above 3000m within the last 2 months will significantly decrease AMS during a subsequent rapid ascent to 4500 m. Exercise training during the altitude preexposures may augment improvement in physical performance. The persistence of altitude acclimatization after return to low altitude appears to be proportional to the degree of acclimatization developed. The subsequent ascent to high altitude should be scheduled as soon as possible after the last altitude preexposure.
Key Words:  altitude acclimatization; acute mountain sickness; high altitude

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The USA decided not to train at altitude before departing, while England spent two weeks playing and training in the Austrian Alps. The director of London’s Altitude Centre, Richard Pullen, who advised Capello and the Football Association on how best to prepare the England squad, said: “The Americans have not done any preparation at all. This is so that they could have full‑on training sessions and arrive very fit, yet unacclimatised. They have taken a gamble on their fitness being enough to see them through.

“The other way [is to] get acclimatised to altitude so your training and recovery can be impaired and when [the team] arrive you’re not completely as fit as you might be. But you are adapted.”

It is 24 years since a World Cup featured stadiums above sea level and Diego Maradona’s Argentina – who unlike some nations at Mexico ‘86 played all their games at altitude – emerged as eventual winners. As every nation during the group phase will play games at sea level and on the Highveld all have had to ensure preparation has been thorough this time.

“If you see a map of where all teams are based you’ll see it’s at altitude,” Pullen said. “For England or any team that goes to altitude – the first couple of days the training load is reduced while the players get used to it and then [they] slowly increase the load to the maximum.”

Pullen does say that despite the fortnight in the Alps, conditions were not perfect as the ideal stepping stone to Rustenburg, which is much higher than Irdning. “Austria was in all the newspapers as being an altitude training camp. In reality they were at 600m. But they did use an altitude kit, which simulates higher altitudes. So in Austria they had access to testing equipment to have their bodies physiologically adapted to the higher altitude they’ll experience in South Africa. But what they haven’t done is prepare for the dynamics of how the ball will move differently, and the drier air – the environmental conditions they’ll find in Rustenburg.”

Becoming familiar with a faster, more unpredictable ball is as imperative as ensuring Capello’s squad rest correctly. “Recovery is not just about sleeping, it is about active recovery, about making sure players have recovered from training sessions,” Pullen said. “There will be monitoring to make sure players are eating properly, hydrating properly, because at altitude you can lose appetite. It’s very important that they look after their health properly.”

Players and footballs have altered experiences in rarefied air due to the reduction in oxygen found at altitude. “Basically as you go up your body tries to produce more red blood cells to be able to transport oxygen around the body,” said Oxford University’s Dr Patrick McSharry. “This means that at high altitudes some people get acute symptoms like nausea, sickness, headaches, lots of horrible things that wouldn’t make it easy to compete in football.”

But it is difficult to know which players will suffer more. “One of the problems is that it seems to vary greatly from person to person so you can’t just predict what will happen to the whole team,” McSharry said. “Some members may be completely fine, others severely impacted.”

Whatever the vagaries Pullen is confident that Capello and England have prepared correctly by leaving themselves nine days between arrival and kicking off against the USA. “They’ve been doing the training in Austria with our equipment and have gone there with plenty of time ahead of the first match,” he said. “And, they’re playing it at the same altitude as where they’re based – so it’s very good.”

Radebe, however, suggested that the USA may still have an edge because of their experience when reaching the Confederations Cup final in South Africa last summer. “America have been here before and the coach knows the conditions,” he said. On Saturday England will begin to find out how well they are adapted.

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What is Altitude Training?

Altitude training, also known as hypoxic training, involves exercising in, living in or otherwise breathing oxygen reduced air for the purpose of improved athletic performance, pre-acclimatization to altitude and/or physical wellness.

Traditionally, individuals had to travel to or live at high elevations to obtain the benefits of this phenomenon. Through the production of the mountain air generators we can simulate altitudes of up to 21,000ft/6,400m. As a result, athletes, fitness enthusiasts and health conscious individual’s worldwide can take advantage of the benefits associated with altitude training while at sea-level.
Proven Benefits
. Maximized speed and endurance
. Elevated strength and power

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By Salvatore Landolina

Jun 3, 2010 3:15:00 PM

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Marcello Lippi - Italy (Getty Images)

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Italy coach Marcello Lippi has played down the 2-1 defeat to Mexico by shifting the spotlight from a lackluster performance to a hard training regime.

Carlos Vela and Alberto Medina ensured the Azzurri’s pre-World Cup preparations got off to the worst possible start. Leonardo Bonucci cut the deficit, but it was not enough.

“We have been in the mountains training for 10 days and we have just come back to play a against a team in much better condition than we are and who have played seven times already, and you have to take that into account,” Lippi told Rai Sport.

Lippi though remains defiant that his Azzurri stars will be ready for the World Cup, claiming the altitude training has shown its effects tonight as the players struggled.

“I know my players, I have spoken to them and they told me they were tired before the game. What’s important is to be in good condition in 10 days when we are in South Africa, not now.

“If we had played seven games like they did then we would have been in better condition.”

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Most Tibetans are genetically adapted to life on the “roof of the world,” according to a new study.

The Tibetan Plateau (map) rises more than 13,000 feet (4,000 meters) above sea level. At such heights, most people are susceptible to hypoxia, in which too little oxygen reaches body tissues, potentially leading to fatal lung or brain inflammation.

To survive the high life, many Tibetans carry unique versions of two genes associated with low blood hemoglobin levels, the researchers found.

Since hemoglobin is the oxygen-carrying component of red blood cells, the find might seem “really counterintuitive,” said study leader Tatum Simonson at the University of Utah’s Eccles Institute of Human Genetics in Salt Lake City.

“Usually, if you or I or any nonadapted person went to high altitude, we would increase our hemoglobin levels to compensate for the low amount of oxygen.”

But high hemoglobin levels have been linked to complications such as hypertension and chronic mountain sickness, Simonson said.

These negative effects could have led to a genetic mutation among Tibetans that “prevented them from making as much” hemoglobin, she noted.

(Related: “Japanese Guts Are Adapted to Sushi.”)

Tibetan Genes Keys to Treating Height Sickness?

Previous research had found that Tibetans compensate for low oxygen levels by taking more breaths per minute than people living at sea level. In addition, Tibetans’ blood vessels are wider, making them more efficient at delivering oxygen to body tissues.

Simonson and her colleagues searched for the genetic basis of high-altitude adaptations by collecting blood samples from villagers in Tibet living at 14,720 feet (4,486 meters) above sea level. (Get insider’s tips on life in Lhasa, capital of China’s Tibet Autonomous Region.)

The team then looked for patterns of genetic variation in the Tibetans’ DNA and compared their findings to existing data on gene variation in lowland Chinese and Japanese populations, which are closely related to Tibetans.

Several variants of genes associated with high-altitude living, such as those that process oxygen, were found in Tibetans but not in their low-living neighbors. That includes the two genes that are strongly associated with low hemoglobin production.

(Related: “Ancient Climate Change Rocked Tibetan Cultures, Research Suggests.”)

Future research is aimed at teasing out more details about what exactly the altered genes do, which could help scientists find ways to “prevent people from getting sick” at high altitudes, Simonson said.

Findings were published online May 13 in the journal Science.

LINK TO SOURCE ]]> http://www.go2altitude.com/blog/index.php/2010/05/tibetans-evolved-to-survive-high-life-study-says/feed/ http://www.go2altitude.com/blog/index.php/2010/05/mechanism-of-hypoxic-training-promoting-angiogenesis-on-muscular-tissue/ http://www.go2altitude.com/blog/index.php/2010/05/mechanism-of-hypoxic-training-promoting-angiogenesis-on-muscular-tissue/#comments Sat, 15 May 2010 03:51:19 +0000 admin http://www.go2altitude.com/blog/?p=278 Objective:In order to provide a theoretical basis and applied methods for hypoxic training applied in sports practice, this thesis studied the mechanism of hypoxic training promoting angiogenesis on muscular tissue by exploring the effect of hypoxic training on regulating the hypoxic responsive genes on muscular issue, the effect of the hypoxic responsive genes on boosting angiogenesis on muscular issues, and the angiogenesis mechanism of hypoxic training muscular tissue.Material and Methods:Hypoxia cell culture and electrophoretic mobility shift assay were applied to study the protein-DNA binding activity of hypoxia induced factor-1 and vascular endothelium growth factor gene, and fms-like tyrosine kinase-1 of human umbilicus vein endothelial cell under hypoxia. 3×3 factorial experiment, progressive treadmill exercise, hypoxia and super-hypoxia increasing by degree were used to establish animal model with different training pattern and different hypoxic stimulus. Thereafter, Blood-gas analysis, in situ hybridization, immunohistochemical technology and computer image processing methods were used to study the effect of hypoxic training on the oxygen binding status of arterial blood, the effect of oxygen binding status of arterial blood on hypoxia induced factor-1αof muscular tissue, and then the promoting effect of hypoxic training on genes transcription of vascular endothelium growth factor and fms-like tyrosine kinase-1. In addition, Enzyme linked immunosorbnent assay, Stereology, immunohistochemical technology and computer image processing methods were used to study the accelerating effect of vascular endothelium growth factor and fms-like tyrosine kinase-1 on hypoxic training angiogenesis of muscular tissue. In the end, transmission electron microscope was applied to study the morphological mode of angiogenesis of hypoxic training muscular tissue.Conclusions:Different Oxygen content mixed gases were administered to culture human umbilical vein endothelium cell to found hypoxia cell culture model for ex vivo study of hypoxic training, and an animal model of hypoxic training was successfully established by progressive treadmill exercise and hypoxic stimulus with progressive hypoxia.Simple hypoxia (hypoxia content from 18.2kPa to 15.2 kPa ) and super- hypoxia (hypoxia content from 17.4 kPa to 11.3kPa ) could not increase density of micro- blood vessel. Normoxic training, hypoxic training, and hypoxic administration after training could increase density of micro- blood vessel. Interaction occurred between hypoxic administration and training pattern, and hypoxic administration and training pattern had different main effects. From the changing of micro- blood vessel, hypoxic training was found to be better than normoxic training to micro- blood vessel on muscular tissue.In vivo, hypoxia could increase binding activity of HIF-1 of culture human umbilical vein endothelium cell and VEGF、Flt-1 DNA. The binding activity was regulated by oxygen content within a certain range. Ex vivo, hypoxia could decrease arterial blood oxygen binding; hypoxic training was the most efficient stimulus to decrease arterial partial pressure of oxygen, while it could decrease arterial blood oxygen binding to a large degree. The transcription regulation mechanism of angiogenesis of hypoxic training muscular tissue was: affected by the degree of oxygen binding, hypoxic training could increase the protein expression of HIF-1 o?n muscular tissue and the increase could promote the genes transcription of VEGF and Flt-1.The mechanism of hypoxia responsive genes promoting the angiogenesis of hypoxic training muscular tissue was: hypoxic training could increase the protein of angiogenesis hypoxia responsive genes VEGF and Flt-1, and after VEGF protein was produced, it could secrete by autocrine or by paracrine, combine with Flt-1 receptor on the vascular endothelium cell membrane, and participate in the angiogenesis of muscular tissue. Hypoxia, training, and hypoxic training all could reduce the content of serum VEGF, meanwhile, the proteins of VEGF on muscular tissue increased and the Flt-1 receptors also increased. Therefore, ingestion and utilization of VEGF from circulation was increased on muscular tissue.Angiogenesis on muscular tissue could be performed by means of sprouting and no-sprouting, among which no-sprouting angiogenesis pattern, i.e. intussusceptive microvascular growth, was the major way, suggesting that muscular tissue could take faster and more economical angiogenesis pattern to satisfy the demands of energy and metabolization.

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