HIV Foundation Health Bad habit or dangerous? That’s why it cracks when we pull our fingers

Bad habit or dangerous? That’s why it cracks when we pull our fingers

Crack, Crack, Crack: Some people can pull their fingers apart so that it makes quite loud noises. Scientists wanted to know where this pop is coming from. 

  • So far there have been various theories about the origin of noise.
  • Researchers observed the process in the magnetic resonance tomograph.
  • There is no indication of whether the cracking is bad or good for the joints.

The cracking noise when pulling apart of fingers formed according to a study by the formation of a cavity in the joint.

Finger in the magnetic resonance tomograph

In the investigation, Greg Kawchuk’s team from the University of Alberta in Edmonton, Canada, took a closer look at a man’s metacarpophalangeal joints in an MRI scanner. The scientists present their results in the journal “PLOS ONE” .

Is there a threat to health?

Some people can crack their joints when they pull their fingers apart. There is currently no evidence as to whether this phenomenon is bad or good for the joints. “So far, no one has ever been able to prove that this  cracking is harmful to health in the long term,” says Professor Jörg van Schoonhoven from the Clinic for Hand Surgery at the Rhön Clinic in Bad Neustadt an der Saale.

Different theories

For a long time there have been various theories about where the popping sound when clicking your fingers comes from. Some scientists suspected that the crackling sound was caused by a bursting bubble in the joint space.

Other researchers hypothesized that the sound is caused by the flapping of ligaments.

Another explanation for the origin of the cracking is what is known as tribonucleation: a mechanism in which the movement of surfaces creates gas bubbles in a liquid.

Study author as guinea pig

To date, there has not been any direct experimental evidence that solidly supports any of the theories. Kawchuk’s researchers wanted to change that. 

For their study, the scientists needed someone who had the ability to crack their metatarsophalangeal joints on request. These joints connect the bones of the metacarpus to the base members of the fingers. The choice fell on Jerome Fryer, one of the study authors.

Pull until it cracks

In the experiment, the researchers examined each finger of the test subject in isolation in a special magnetic resonance tomograph, with which movement sequences can be recorded.

The finger was attached to a kind of tube that was connected to a cable at the other end. Then the cord was pulled until Fryer’s fingers cracked. The entire process in the joint was recorded with an MRI scanner.

Is a cavity the cause?

Shortly before the cracking could be heard, the researchers were able to observe the formation of a cavity in the images.

The scientists therefore assume that tribonucleation has taken place in the joint: “It is a bit as if a vacuum is being formed,” explains Kawchuk in a communication on the study. “If the joint surfaces suddenly separate, there is no longer any liquid left to fill the increasing joint volume. This creates a cavity.” The noise is generated by this event. 

“It is interesting to know what acoustic phenomenon is behind the cracking of the fingers,” said the hand surgeon van Schoonhoven. However, by including only one person in their study, Kawchuk’s researchers would be able to explain the phenomenon only for that person. “The experimental setup does not allow any generalized statements,” said van Schoonhoven.

 

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Tomatoes, cucumbers, pumpkins: medical professionals are sure that vegetables make us sickTomatoes, cucumbers, pumpkins: medical professionals are sure that vegetables make us sick

Grains and vegetables protect themselves against predators and diseases with special substances. They are unsuitable for human digestion and make us sick, says a US nutritionist. Is he right?

According to popular belief, those who eat vegetables, fruit and whole grain products every day have a particularly healthy diet – and thus possibly make a dangerous mistake, get fat and sick. The American cardiologist and nutritionist Steven R. Gundry is convinced of this, as he explains in his bestseller “The Plant Paradox”, which has also been available as a German version since this year (Steven R. Gundry: “Bad vegetables. How healthy Food makes us sick ”, Beltz).

Vegetable plants use lectins for defense

Lectins are said to be responsible for the harmful effects of supposedly healthy foods. These are certain proteins that plants have developed for defense so that they are spared from fungi, bacteria and parasites. In fact, lectins act similarly to antibiotics and can be toxic, especially when raw.

The substances can harm people

Lectins make green potatoes and raw beans inedible . The best-known lectin is gluten, avoided by many because it can lead to bowel inflammation and celiac disease . Gluten, known as adhesive protein, illustrates the negative properties of lectins particularly impressively: These proteins are extremely easy to bond, stick to cells and tissues, preferably in the intestine. The mucous membrane cells change, the intestinal wall becomes permeable for pollutants, which in turn can make the entire organism sick.

Sick from lectins – from Alzheimer’s to rheumatism

But not only celiac disease is caused by the harmful effects of lectins. The proteins bind to red blood cells, thicken the blood and thus promote arteriosclerosis and cardiovascular diseases. Steven Gundry also explains many other diseases of civilization with the negative effects of lectins.

Because they can actually dock on all tissues, such as the pancreas, joints, bronchi, nerves, brain, and the immune system attacks them there as intruders, autoimmune diseases would develop: diabetes , arthritis and rheumatism, asthma , Parkinson’s and Alzheimer’s .

These foods are high in lectins

The doctor therefore promotes a diet that is as free from lectins as possible (LFE, lectin-free diet). The negative list of foods rich in lectin includes the following products:

  • loaf
  • Potatoes and potato products
  • rice
  • pasta
  • Beans and legumes
  • soy
  • tomatoes
  • Cucumbers
  • pumpkin
  • Grain
  • Vegetable oils
  • sugar

Steven Gundry also largely avoids fish and meat, or at least restricts consumption – because breeding animals are mainly fed with corn and soy. Both types of food naturally contain lectins. If they are genetically modified, however, they provide even more of it to protect the plants from pests even better. With the feed they get into the animal and thus into the meat that is put on the plate.

How to eat a lectin-free diet

The negative list is long, but there are also a number of foods that contain little or no lectins. The positive list of desirable foods suggests, among other things:

  • Coconut oil
  • Coconut milk
  • Hazelnuts
  • Walnuts
  • Sweet chestnuts
  • Olives
  • Tigernut flour, chestnut flour
  • Dark chocolate
  • cream cheese
  • Goat cheese
  • butter
  • cream
  • Crustaceans, fish (rare)
  • certain types of fruit in small quantities (apples, pears, blueberries, raspberries, kiwi, plums, peaches, citrus fruits)
  • Cabbage vegetables of all kinds
  • artichokes
  • garlic
  • Onions
  • Meat (no more than 125 gr per day)
  • Eggs
  • Sweeteners such as erythritol, stevia, xylitol
  • 1 glass of red wine per day

Of course, all products should come from organic cultivation or rearing if possible, i.e. have the best organic quality.

Lectin-free diet – new fad diet or serious prevention and therapy?

At first glance, the impression arises: after fructose, gluten and carbohydrates, lectins are now supposed to be the bad nutrients that lead to obesity and make you sick. But the impression is deceptive. Steven Gundry’s observations should probably be taken seriously. There is some evidence for his theses:

  • It has long been known that lectins are unfavorable and are therefore even referred to as ” anti-nutrients ” in nutritional science . But this fact has had little impact on nutrition plans and diets until now.
  • Initial studies show that lectins can be linked to rheumatism and Parkinson’s disease .

However, there is (still) a lack of larger studies on the extent to which lectins can promote obesity and illness. However, in a self-experiment, Steven Gundry lost 35 kilograms within a year and at the same time lowered his high blood pressure , and the arthritis had also disappeared.

The doctor treated around 1,000 patients on the basis of these positive experiences with the LFE. He observed 200 of them as part of a study . For six months, the patients who all had cardiovascular diseases such as coronary artery disease ate according to this diet. After completing the examination, her heart function and blood values ​​had improved significantly.

Conclusion: It should definitely not be a fashion diet. However, LFE cannot be easily integrated into everyday life, the usual nutrition plan has to be fundamentally redesigned. But to make this as uncomplicated as possible, the doctor gives many tips and simple to fine recipes in his new guide on “bad vegetables”.

The big meat check: how much you can eat and how you can prepare it healthilyThe big meat check: how much you can eat and how you can prepare it healthily

Givers of strength with essential vitamins and protein or cholesterol bombs loaded with antibiotics – the subject of meat is hotly debated. FOCUS Online names the most important facts about the individual types of meat – and shows what “healthy” fat traps are.

The hunger for meat in Germany is great. Every inhabitant eats around 60 kilograms per year. Around 750 million animals are therefore slaughtered every year. Meat consumption has been falling for years, but only in the single-digit range. However, statistically speaking, every citizen still consumes around 1,100 animals in his life, including mainly chickens, but also just under 50 pigs and four cattle, as the BUND’s last meat atlas in 2018 calculated.

Meat causes a lot of CO 2 , but provides the best protein

Meat is thus undoubtedly one of the staple foods. However, it is left out of the picture that meat consumption is devastating for the climate balance: Through animal production, a meat eater pollutes the atmosphere with a good 1,800 kilograms of CO 2 per year and thus heats the climate catastrophe, vegetarians only make up about half of this.

Aside from that: nutritionally, meat offers a lot of positives. “Meat is definitely a high-quality food because it provides us with protein in particularly good bioavailability,” says Antje Gahl, press spokeswoman for the German Nutrition Society ( DGE ).

Animal protein, i.e. from meat and dairy products, can be used so well by our body because the composition of the amino acids is very similar to that of human protein. Animal protein usually contains all of the essential amino acids that we need in sufficient quantities, while plant-based foods often do not have the full spectrum of these amino acids. The body can therefore produce protein particularly quickly and appropriately from animal protein – for the muscles, for example.

In addition, meat is also characterized by other valuable ingredients:

  • readily available iron,

  • Selenium and

  • zinc

– all minerals and trace elements that are indispensable for blood formation, immune system, cell health, fertility and much more. Another unique feature is the high proportion of B vitamins, including vitamin B12 , which is only found in sufficient quantities in animal foods such as meat, eggs, milk and dairy products.

Preserving nutrients through proper cooking

To ensure that these nutrients are preserved as well as possible during preparation, the expert recommends steaming and slow frying, preferably with little fat. Some B vitamins are sensitive to heat, such as vitamins B1, B2 and B6 – vitamin B12 a little less.

The way in which meat and meat products are prepared determines how many vitamins are destroyed and how undesirable pollutants are formed. Therefore, everyone should consciously pay attention to high temperatures such as when grilling or the duration of heating. The longer and hotter it is cooked, the more pollutants are created or parts of the valuable B vitamins are destroyed.

Nevertheless, barbecuing is particularly popular . An important tip from the expert for grilling: “Dab the marinade before you put the meat on the grill.” Otherwise it will drip into the embers, burn and, among other things, produce polycyclic aromatic hydrocarbons. PAHs are strongly suspected of increasing the risk of cancer.

Meat is healthy when prepared correctly. But is it also an indispensable food? “No”, says the qualified ecotrophologist. Apart from vitamin B12, which is also contained in milk and dairy products, each of these nutrients can be obtained from plant-based foods – even if not in the ideal composition and high quality that is given with meat.

The “dark side” of meat: cholesterol, purine and arachidonic acid

However, meat is also the main source of cholesterol. In high amounts, cholesterol is a risk factor for arteriosclerosis and thus heart attack and stroke. It is not only present in the visible fat in the meat, but also in low-fat pieces. 100 grams of lean meat provide around 50 milligrams of cholesterol per 100 grams. 300 milligrams per day is the maximum limit for the intake of cholesterol per day for healthy people, i.e. without a lipid metabolism disorder.

In addition, meat, especially offal, contains purine, i.e. uric acid, which supports gout. Arachidonic acid plays a role as the third negative, natural ingredient in meat. The body creates inflammatory substances from this fatty acid. Diet suggestions for diseases with an inflammatory character such as rheumatism are therefore always meat-free or strictly reduced in meat.

“The majority of the amount of cholesterol and purine ingested with food actually comes from meat and meat products such as sausage and ham, a particularly large proportion of which have offal,” confirms the scientist. Nevertheless, cholesterol is an indispensable substance in the body because it takes on important tasks in building cells and nerves. “But our body also produces cholesterol itself and is therefore not dependent on the intake with food,” she explains. Anyone who then eats a lot of meat and sausage quickly absorbs high amounts of cholesterol.

Red meat vs. White meat

However, not all meat is created equal . When it comes to health, a distinction is made between red and white meat. Red meat, i.e. beef, pork, lamb, sheep and goat, is considered particularly unhealthy because it is said to favor diseases.

“Anyone who eats a lot of red meat and especially processed red meat has a higher risk of colon cancer, as many studies indicate, according to the current state of knowledge, consumption of white meat (poultry) is not related to cancer,” says the qualified ecotrophologist. Overall, however, the quality, quantity and method of preparation of the meat are decisive in contributing to a healthy diet.

Pork is leaner, chicken is fatter than expected

But the animal from which the meat comes also plays an important role. How about pork, the most popular meat in Germany and the other types of meat consumed in this country?

pig

Depending on the fat content, pork provides between 100 and 250 kilocalories per 100 grams, 70 milligrams of cholesterol. It also has a high content of vitamins B1 and B6.

So pork is surprisingly low in calories, but provides more cholesterol than, for example, beef. “Reach less for high-fat parts,” advises Antje Gahl, “but because of its vitamin B1 and B6, zinc and iron content, pork can make a contribution to a wholesome diet.”

Pork is popular because of its fine taste and can be used in many ways, quickly prepared and is particularly suitable as pan-fried meat (schnitzel) or roast with a crispy rind.

Beef

In terms of calorie content, beef is comparable to pork, depending on the fat, has around 150 to 200 kilocalories per 100 grams and 50 milligrams of cholesterol. It scores with high levels of vitamin B12, zinc and iron.

The strong taste of beef is particularly appreciated by many meat eaters. Because of its long fibers, beef lean meat must be specially prepared; apart from the fillet pieces, it requires a longer cooking time.

poultry

White, tender meat and a nutty taste are the characteristics of chicken, duck, turkey and goose. Because of the layer of fat under the skin, poultry meat provides a relatively large number of calories, around 270 kilocalories per 100 grams. If you choose a skin-free steak, you only get around 160 kilocalories. The fat content is around 25 grams per 100 grams of poultry meat.

In addition, poultry meat is particularly rich in protein, so it provides a lot of energy. Zinc, potassium and B vitamins make poultry meat particularly healthy.

But be careful, the crispy skin of chicken and duck contains lots of purines, so it can increase the risk of gout. This is particularly relevant for those who already have elevated purine levels, warns the expert. However, poultry is safe for healthy people in this context.

But: “Poultry meat contains significantly more cholesterol than is generally assumed, namely around 90 milligrams per 100 grams,” she adds. Chicken may be low in fat, but that doesn’t mean it’s low in cholesterol, as is often assumed.

lamb

The tender, dark meat with its strong taste is not one of the Germans’ favorite varieties. However, it contains many B vitamins as well as iron and has a high proportion of valuable protein. What is surprising, however, is that on average lamb provides more calories than pork, almost 200 kilocalories per 100 grams of fresh meat, as well as 70 milligrams of cholesterol and many saturated (unfavorable) fatty acids.

Particular attention should be paid to the fatty acid composition with many saturated fatty acids in lamb. Like chicken, lamb is not fundamentally unproblematic when it comes to fat – as is often assumed.

Wild

It looks different with game meat. Saddle of venison, venison ragout, roast venison and wild boar are rarely served in Germany, although the meat is actually very low in fat, rich in protein and rich in vitamins B1 and B2, potassium, magnesium, iron, zinc and selenium – and therefore healthy. Depending on the variety, it provides only 100 to 160 kilocalories per 100 grams of fresh produce, with less than ten grams of fat, around 60 milligrams of cholesterol and hardly any purine.

However, game meat should only be enjoyed well cooked because it can contain parasites, as the Federal Institute for Risk Assessment ( BfR ) warns. The radiation exposure of venison can also be high, depending on the region. “In wild boars, values ​​are still occasionally measured today that exceed the limit value for marketing 600 Becquerel per kilogram by more than ten times,” reports the Federal Office for Radiation Protection BfS .

horse

Horse meat is also controversial, although it is very healthy with a high content of minerals, vitamins and protein, but low in fat (around two grams per 100 grams of meat) and low in cholesterol. Here there are more psychological reasons why the meat of the popular sport animals is frowned upon, in contrast to France , where it is coveted as a delicacy.

You can eat that much meat

Meat is therefore quite healthy. “Nobody has to go without meat in principle, because it is a valuable part of our diet,” says the expert. However, it depends on the amount, and the following applies: less is more.

The DGE recommends that people who eat meat do not consume more than 300 to 600 grams of meat and meat products per week. That goes for adults. So it’s practical: eat meatless for a few days, then a meat dish. A portion of meat can weigh 100 to 150 grams, a slice of cold cuts 15 to 25 grams, depending on the type.

“Meat makes perfect sense in a wholesome diet, because it covers the need for many important nutrients with a single food. Even these small amounts are sufficient for this. It is best to choose predominantly plant-based foods and supplement them with animal-based foods, ”emphasizes Antje Gahl.

Of course, that doesn’t mean everyone has to eat meat. Those who prefer a vegetarian diet can supply these nutrients through a targeted selection of different types of vegetables and fruits, whole grain products, legumes, nuts and dairy products.

Organic meat or meat from conventional farming

Meat consumption in moderation is therefore quite healthy. It is not necessary to weigh one type of meat against another. Variety as well as personal preferences, taste and last but not least religion are important, emphasizes the qualified ecotrophologist. For more and more people, the ecological balance of rearing and animal welfare also play a role, keyword antibiotics, but also manure pollution and thus nitrate in the groundwater.

In organic animal husbandry, even fewer antibiotics may be used than in conventional farming, although there has also been a reduction recently. It is different with manure, whether organic or bulk, every animal produces just as much of it.

The best advice: eat less animal foods and more plant-based ones. In this way, fewer resources are used, the environment is less polluted and CO 2 emissions would be significantly reduced. Because meat production in particular produces a lot of the climate gas methane, which is many times more harmful to the climate than CO 2 .

Halve meat consumption

But as mentioned at the beginning: With 60 kilograms of meat consumed per person per year, Germany is far from the moderate recommendations of the DGE, which make up at most half of this amount. Accordingly, healthy meat consumption should hardly exceed around 30 kilograms per year – for the benefit of health, animals and the environment.

These tricks help against the bellyThese tricks help against the belly

From the age of 30, German men are growing rapidly. It doesn’t look good and is a health hazard. Nevertheless, the stronger sex has difficulties with weight loss programs. FOCUS Online explains why this is so and which diet works best for men.

Surveys by the Federal Statistical Office show that Germany’s men are getting fatter year after year: If the body mass index is used as a benchmark, 62 percent of men are currently overweight (BMI over 25) and 18 percent are obese (BMI over 30) . And while only a third of the 20 to 25 year olds are overweight, the proportion among the over 50 year olds rises to more than 70 percent. Among women, 43 percent carry too many pounds around – but the proportion of people who are overweight shrinks slightly every year.

Visceral belly fat is a health risk

But while many of the overweight women have the word “lose weight” at least in the back of their minds, the term “diet” bounces off most men. Somehow, around 30, they gradually lose their firm body, but they feel comfortable with their figure, which they do not find too fat at all. Men seem to be more tolerant of their paunch than women of their love handles.

This has nothing to do with reason, because it is now known that so-called visceral belly fat in particular poses a health risk. The metabolically active tissue releases inflammatory substances and increases the risk of cardiovascular diseases, diabetes and erectile dysfunction.

The traditional image of the man promotes obesity

Papa gets the biggest piece of meat because a man has to eat properly – this age-old belief persists in Germany. And so men eat an average of 1.1 kilograms of meat every week. That is twice as much as for women and twice as much as recommended for a healthy diet. In addition, there are plenty of carbohydrates in the form of pasta, potatoes or white bread, sausage, butter and cheese – and the plates are often scooped up on the “all-you-can-eat” principle.

Many men get fat because they eat and drink too much of the wrong things, for example six times as much beer as women. And they stay fat because it is very difficult to change established eating habits.

Men need a lot of motivation to diet

Doctors and nutritionists find time and again that men rarely lose weight because they find themselves too fat. It almost always takes an external spark for the average man to change something in his lifestyle, for example when the doctor diagnoses diabetes or a heart problem, or when a relationship breaks up.

This was also the result of an evaluation of two major diet programs by the British health authority NHS. And there were even more men-specific issues on the subjectLose weight:

  • Only ten percent of men had received a referral from their doctor for the programs.
  • But: Once men start with such a measure, they develop ambition to lose weight and get out less often than women.
  • Men are more likely to respond to programs that avoid the word “diet” and place great emphasis on exercise.

Proper diet and exercise

Weight loss results mainly from diet changes. However, if men also expand their muscle cushion in the process, the effect is increased because of the high energy requirements of the muscles. Men should exercise all muscle groups in the body and not just squint at the fast-growing biceps.

A sporting program that includes a mix of strength and endurance is often better accepted by men than women. Sport should be fun in any case, because after actively losing weight, exercise can stabilize the desired weight – without the man having to constantly watch the calories.

What men should eat for weight loss is no different from a diet for women:

1. less red / fatty meat, sausage and animal fat

2. more vegetables

3. less white flour and sugar (carbohydrates)

4. more white / lean meat, tofu, or legumes (protein)

5. no alcohol

Intermittent fasting – as invented for men

Intermittent fasting is a suitable diet method for those who like it simple and uncomplicated. With the simple principle, there are time windows for food intake, which alternate with fasting episodes. The fat metabolism is activated, excess pounds can melt – especially if you keep an eye on the calories.

  • The popular “16: 8” method is suitable as a permanent nutritional principle: During the day, people eat in an 8-hour window, two to three meals without snacks in between. The nocturnal eating break is extended to 16 hours – ideal for men who do not like breakfast.
  • The “5: 2” interval fasting allows you to eat normally on five days, then there are a maximum of 500 calories on two days.
  • The “1: 1” method is considered to be the most difficult to stick to: alternately eat one day and one fast.

For men (and women), the combination of two protein shakes and a normal meal a day is a good start to losing weight. US presenter and comedian Jimmy Kimmel lost over twelve kilos before he switched to intermittent fasting “5: 2”.

The man’s body is the best weapon against obesity

Once men have decided to lose weight, they enjoy a great advantage over women. Men are taller, heavier and have more muscles – as a result, their bodies burn more energy even when they are resting.

If they also save calories, they lose more weight and lose weight faster than women. This was shown by a study with 2000 male and female participants who had exactly the same general conditions. After eight weeks, the men saw 16 percent more weight loss. Their bodies cling less to fat deposits, which in women are a stubborn reservoir for pregnancy and breastfeeding.