If you want to lose weight, find a mountain retreat

February 5, 2010 by Lin Edwards report
Photo of White Mountain peak taken in the Alpine Zone. Credit: Jonathan Lamb/Wikimedia Commons

(PhysOrg.com) -- A new study has found the secret to effortless weight loss: spend some time at high altitude. Even a week on a mountain retreat can produce weight loss in sedentary people eating as much as they want and doing no exercise at all.

A study in 1957 showed that animals lose weight at high altitudes, and weight loss has long been known for people at high altitudes, but the subjects were all extremely fit and active mountaineers and skiers. Obese and overweight people tend to suffer altitude sickness and resultant nausea, dizziness and heart attacks, when at very high altitudes, so the research team from the Ludwig-Maximilians University in Munich decided to find out what would happen if overweight people spent some time at a moderately of 8,700 feet.

Their 20 subjects, all male, were of average age 56, obese (average BMI of 34), and with risk factors for diabetes, strokes and . They were all from Munich, which is around 1,740 feet above sea level, and were housed for a week in a research station 1,000 feet below the peak of Zugspitze, Germany’s highest mountain. They were encouraged to eat and drink as much as they wished, and apart from leisurely walks around the station, were not allowed to do any exercise. The research team monitored their subjects’ weight, , metabolic rate, and hormone levels before their stay, during the week, and a month afterwards.

Leader of the team, Dr Florian J. Lippl, said that during the week the subjects ate around an average of 730 calories less than they had before their stay, and they lost 3.5 lb on average. During the month after their stay they regained an average of 1.5 lb, but they were still burning slightly more calories than they had before their alpine stay.

Dr Lippl said the levels of the , which suppresses appetite, rose during their week at high altitude, while the hunger hormone grehlin was unchanged, and this meant they were less hungry during their stay. Their was also higher at altitude, which meant they burned more calories and this, combined with the lower calorie intake, caused the weight loss.

The research is in a preliminary stage; no data was collected on whether the weight loss was fat tissue, water, or muscle weight, and there was no control group. The researchers plan to use a higher mountain in Italy for the next stage of the research.

One drawback to the mountain retreat for idea is the finding that after only a month the subjects had re-gained one third of their lost weight. Other studies have shown that appetites return to normal if people are living at high altitude for around six months. Another drawback is the potential for adverse health effects for overweight people at high altitudes, since they can be more prone to heart attacks and other conditions.

Professor Richard N. Bergman of the University of Southern California said the study was preliminary but interesting, and noted that in the U.S. the state of Colorado, which has the highest mean elevation, also has the lowest rate of obesity rate, while the highest rates of obesity tend to occur in states with low mean elevations.

The research paper was published in the journal Obesity on 4th February.

More information: Hypobaric Hypoxia Causes Body Weight Reduction in Obese Subjects, Obesity, (4 February 2010). doi:10.1038/oby.2009.509

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mysticfree
not rated yet Feb 05, 2010
I wonder what is the minimum altitude is for this effect to take place?
Illure
not rated yet Feb 05, 2010
Well, that explains why the Swiss can afford eating so much chocolate.
antialias
not rated yet Feb 05, 2010
Most people in Switzerland live in the valleys - not on the mountains. Zurich, for example, is 1500ft above sea level (of the top ten cities 9 are below 1700ft).
barakn
3.3 / 5 (3) Feb 05, 2010
People raised at higher altitudes have slightly larger lung capacity. Perhaps the higher metabolic rate is simply due to people with smaller lung volume needing to breathe at a faster rate once moving to higher altitude, a process which might change once their red blood cell count increases to adapt to the lower oxygen levels. This makes one wonder if the benefit is reduced for people raised at high altitude. Do people who move to Colorado weigh less than Colorado natives?
bredmond
not rated yet Feb 05, 2010
We have to use this information to set up weight loss camps before the other guys find out and set up a camp of their own. Gotta grab the market share at the early stages. We could do one high profile one with enhanced facilities , and we could also have some simpler ones for lower income clients.
Shaffer
5 / 5 (3) Feb 06, 2010
Should have read "If you want to lose weight, get high."
Birger
not rated yet Feb 08, 2010
Countries like Peru or Bolivia could set up weight-loss vacation settlements on the Altiplano, at an altitude of 4000m/12000ft. An easy way to get tourist money, and providing an alternative career for the (desperately poor) locals instead of growing coca plants...

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