We have been believing for years that women live longer because of their lifestyle. Science has a much deeper explanation

If we take a look at the World Bank’s global statistics, there is an unbreakable pattern that repeats itself in practically every country in the world: Women live longer than men. Conventional wisdom often dismisses this phenomenon with a quick response based on lifestyle or “men take more risks.” And although there is some truth in this, the scientific reality is much more complex. Because? To understand female longevity, We must focus on the DNA that we have in all our cells. Something very basic is that women have two X chromosomes, while men have one X chromosome and one Y chromosome. A fundamental difference, because that second X chromosome in women acts as a kind of backup. This means that if a gene on one X chromosome suffers a mutation or is damaged, the female body can turn to the healthy copy on the other chromosome. Men, however, play a single card, since if their only X chromosome has a defect, there is no plan B. In addition, this chromosome is vital because it houses a large number of genes related to the immune system, which gives women a more robust response to infections. It goes further. Genetics is not everything here, but the body has an ace up its sleeve, which are the mitochondria, which are nothing more than the “power plants” of our cells. These organelles are inherited only maternally and, as proposed in 2007sexual differentiation has a direct biological cost for men, translating into lower mitochondrial function and, therefore, greater cellular oxidative stress that accelerates aging. The hormones. Beyond genetics and mitochondria, we must mention sex hormones, which are in very different proportions between sexes. Estrogens, for example, are the main female sex hormones that, in addition to regulating the reproductive cycle, act as a powerful antioxidant shield. Among its effects stands out maintaining the flexibility of blood vessels, reducing “bad” cholesterol and preventing inflammation. This largely explains why the incidence of cardiovascular disease in women is significantly lower before menopause. In the man. On the other side of the coin we have testosterone. Although it is crucial for the development of muscle and bone mass, high levels of this hormone in men are historically associated with increased cardiovascular risk at an early age and long-term depression of the immune system. The evolution. Someone may fall into the idea that this system is something exclusive to humans, but evolutionary biology shows us otherwise. Here, a 2025 study analyzed 1,176 species and the results revealed that in mammals, females live on average 13% longer than males. The reason lies in reproductive strategies and the biological wear and tear derived from male sexual competition, such as fights over territory or mating. However, it was seen that andIn birds, males live 5% longer; since in the avian world, males usually have two identical sex chromosomes (ZZ) and females have different sex chromosomes (ZW). Furthermore, in many bird species, parental care is shared or falls to the male, which reduces their risk behaviors. Human behavior. Of course, biology does not operate in a vacuum and genetic and hormonal factors must be added. the behavioral gap and social. For example, the consumption of toxic substances has a greater prevalence in men, being associated with cancer, cirrhosis or respiratory diseases. But, as we have said before, testosterone is also linked to a greater propensity to take risks, which translates into higher mortality rates from traffic accidents or cases of violence. On the other hand, women suffer from “invulnerability syndrome” which causes them to seek preventive medical services much more frequently. Men tend to postpone visits to the doctor until diseases are in more advanced stages, making treatment difficult. In addition, women tend to build stronger social and emotional support networks, a factor directly linked to greater survival in old age. Images | Age Cymru In Xataka | 5 minutes of sleep, 2 of exercise and half a serving of vegetables: the macro study that supports a great longevity ‘hack’

science confirms the exact dosage of strength training

For decades, when we thought about exercise for health, the image that came to mind was that of someone running or pedaling. Cardio exercise was the undisputed king of medical recommendations, but now a growing number of sports and medical professionals are raising their voices to give prominence to strength training as something practically mandatory if you want to reach an advanced age with a good quality of life. There is still evidence. It is not a gym exaggeration, but in recent years, scientific literature has taken a spectacular turn, demonstrating that lifting weights, using resistance bands or training with our own body weight is not just an aesthetic issue, but the true protective shield against aging and mortality. The tests. Until recently, we knew that being strong was good for preventing falls in old age, but current data goes much further. Muscle is a living endocrine organ that regulates our metabolism, and exercising it has a direct impact on the main causes of death worldwide. Without going any further, a review published in 2022 associated muscle-strengthening activities with a lower risk of all-cause mortality, but also with specific drops in the incidence of cardiovascular disease, diabetes, and various types of cancer. That same year, the American Journal of Preventive Medicine put precise numbers on the table by pointing out that any amount of strength training is associated with a 15% reduction in all-cause mortality, a 19% lower cardiovascular risk, and a 14% lower cancer risk. The most recent. If we go to this same year, a Harvard megastudy has finished closing the debate after following 147,000 adults for 30 years. Their findings are an instruction manual for longevity, discovering that performing between 90 and 119 minutes of strength training per week was associated with a 13% lower risk of all-cause mortality and a dramatic 27% reduction in mortality from neurological diseases. The quantity. One of the big myths of strength training is believing that to get medical benefits, you have to train like a bodybuilder or lift extreme loads every day. Science shows that the dose-response relationship is not linear, but rather that most of the benefits are concentrated in surprisingly moderate training volumes. Specifically, the optimal range is found in this study between 30 and 120 minutes a week. That is why going from zero to 45 minutes a week represents a brutal improvement in life expectancy. However, doing 5 hours of weight training per week does not multiply those benefits by five; In fact, the data suggests that a plateau occurs where the additional benefit is minor, and even exaggeratedly high volumes may not be optimal for overall longevity. The combination. If strength training is incredible on its own, when combined with aerobic exercise, the results skyrocket. Already in 2019, the European Journal of Preventive Cardiology reported that combining both types of training produced an additive effect, reducing general mortality by up to 40%. But the recent Harvard megastudy has raised that figure and points out that people who combine an aerobic routine with their optimal minutes of strength manage to reduce their risk of mortality between 45% and 58%. Images | Anastase Maragos In Xataka | Experts agree: “People who lift weights 2 hours a week and walk daily live longer”

If you are going to see the eclipse on August 12, science needs you

The Generalitat of Catalonia, the Institut d’Estudis Espacials de Catalunya (IEEC) and the Vall d’Hebron Institut de Recerca (VHIR) have just announced a citizen science initiative aimed at analyzing how a total solar eclipse affects the health and physiology of human beings. There is enough data on how they affect these astronomical phenomena to other animals, but there is hardly any information about humans. For this reason, these institutions have launched the Solaris application, with which they hope to gather around 5,000 people to participate in a study whose results will be known at the end of September. The requirements. To participate in this citizen science project A series of requirements must be met. First of all, you need to download the Solaris application and have a smartwatch or any similar activity device that measures, at a minimum, heart rate. Data must be taken for five consecutive days: the two days before the solar eclipse on August 12, 2026, the day of the eclipse and the two days after. It is important that the recordings have time references and, also, that intense exercise is not practiced during the measurements. What you want to measure. Mainly, those responsible for this research are interested in knowing how experiencing a solar eclipse affects heart rate and respiratory rate. Two important factors coincide in this type of event. On the one hand, the excitement of seeing something newwhich on many occasions has never been witnessed. And, on the other, the incoherence of a short dusk in the middle of the day. The fact that light disappears when it is not appropriate and then appears again a few minutes later can affect the mechanisms involved in circadian rhythms. It is true that it is something very specific, but it would be interesting to see if detectable effects actually occur at a physiological level. The results. The total solar eclipse will take place on August 12. Once the application is synchronized with the smart watch, the data reaches the researchers directly, thanks to OneCareAI technology, which allows data to be collected safely and anonymously. Once all the data has been collected, it will be processed to carry out a first draft of the study, which will be made public at the end of September. It won’t take long for participants to know the results. And what about the animals? There is a lot of information documented on how a total solar eclipse affects animals. For example, it has been seen that birds sing a lot, dogs bark and cattle go to the stables, only to return to the pasture again. Activity has also been detected in nocturnal animals, such as bats or some birds. When daylight comes, they return to their hiding places, clearly confused. It has even been documented how eclipses affect some plants, which normally tend to open their flowers at night. Although it is not yet time, we often see how the flowers are seen ahead of time due to the darkness. Beyond all this, we have no idea how the solar eclipse will affect ourselves. Thanks to this Catalan study, we will have information for the first time. Nothing like it has ever been done in the entire world. Do you dare to participate? Image | Magnificent In Xataka | A third of Spain will be completely dark for a minute or two. The astronomical event of the century is approaching

Today “a masterpiece that will go down in history” arrives on Netflix, thanks to an original approach to a unique science fiction story

Netflix just released ‘Glimpses of tomorrow’the first series that Kyoto Animation produces exclusively for the platform, and it does so with a certainly tragic background: almost eight years have passed since the studio confirmed the adaptation. A year after the announcement, a man entered the studio offices with gasoline and set the building on fire. 36 people died and another 32 were injured. The author was sentenced to death in 2024, and the attack destroyed much of the studio’s materials and equipment, and with them, any progress that existed on the project. In any case, the series has survived the tragedy, and it imagines a Kyoto of 1907 where electricity was never developed and steam became the dominant technology, leaving the city permanently covered in smoke. As a child, the protagonist invented projects that he captured in a notebook called the Electrical Catalog of the 20th Century, together with his older brother. He took that notebook to the war and never returned. The protagonist, now an adult and in the company of a young woman who is trying to escape an arranged marriage, will embark on a search for the treasure of his childhood. Minoru ÅŒta directs the series in his first project as a director. He had previously worked as a key animator on ‘Love, Chunibyo & Other Delusions!’ and ‘Liz and the Blue Bird’, and as episode director on ‘Kobayashi-san’s Dragon Maid’. It is he himself who said that “‘Flashes of Tomorrow’ is a work that will remain engraved in the history of anime“. An unusual statement coming from someone directing his first project. But the truth is that the series is raising expectations: before reaching Netflix, a tour of cinema screenings was held in Japan, the United Kingdom, Thailand and North America that started on June 14, in addition to a screening at the Annecy International Animated Film Festival. All of this is part of the effort that Netflix is ​​making to include more anime in its programming: it has announced eight series and three movies for 2026 in Japan. In Xataka | Today the best science fiction series of the moment returns, with a twist in its story that has given it a perfect score

the proposal of science against solar superstorms

Our civilization is addicted to electricity and satellites, and this dependence has given us unprecedented technological progress, but it has also left us exposed to a silent and colossal enemy such as the Sun itself. Now, a team of scientists has put on the table a plan worthy of science fiction to protect us from a global blackout that focuses on deploying an immense “airbag” of plasma in Earth’s orbit to cushion the impact of solar storms. The proposal baptized like StormWallis not the script of a Hollywood movie, but has just been published in the prestigious magazine Space Weather. Our problem. To understand why we need a space airbag, we must first understand the threat, because when the Sun experiences coronal mass ejections, spews billions of tons of magnetized plasma into space. If that cloud points towards us, it collides with the Earth’s magnetic field, causing geomagnetic storms. This is where our magnetosphere comes in, which is nothing more than an excellent natural shield, but it has a limit. For example, when we have had extreme solar storms like the famous Carrington event of 1859 or the Quebec blackout of 1989, solar particles can overload power grids, destroy transformers, fry entire satellite constellations, and disrupt global communications. The StormWall project. The physics behind StormWall is based on altering what astrophysicists call magnetic reconnection, which is nothing more than the process by which energy from the solar wind is transferred to the Earth’s magnetic field. The plan proposed by Walsh and Welling consists of placing a fleet of six satellites in orbit geostationary. With all this, when early warning systems detect that a lethal coronal mass ejection is heading towards Earth, for which we have a couple of hours of margin, these satellites would go into action. How would it be done? The maneuver would consist of releasing around 400 tons of ionizable gases directly into space. And the good thing is that the candidate elements for this space dust are lithium, barium, sodium or, in an even cheaper alternative, simply salt water. Upon release, this material would be rapidly ionized by solar radiation, creating a dense cloud of artificial cold plasma as if it were an orbital “airbag.” According to the authors’ computational simulations, this plasma injection would modify the dynamics of magnetic reconnection, reducing the intensity of a severe geomagnetic storm by more than 60%. It would be the difference between a technological extinction event and a simple anecdote with beautiful northern lights. For researchers It is not technical madness and neither is it for the scientific community. Here independent experts who have not participated in the study view the viability of the project favorably. For example, Allison Jaynes, a space physicist at the University of Iowa, and Gurudas Ganguli of the US Naval Research Laboratory, have described the idea as “highly innovative and feasible in the near term.” But also, it is not the first time this has been experimented with. In early 2026, the US Naval Research Laboratory itself carried out experiments injecting barium with sounding rockets into the upper layers of the atmosphere to study radiation cleanup. Images | freepik In Xataka | China has a spaceship of which there are barely any photos. Another unidentified object has just been released into orbit

Science confirms that movement literally ignites your creativity

Being in front of a screen or a piece of paper and needing ideas to emerge is something that for many people is an urgent need, but the problem here is that sometimes it is completely impossible. But the reality here is that we have a wonderful way of get these ideas to come to mind through a simple walk. Science has studied it. For decades, experts have been looking for a way to unblock our brain in this situation, and here a study published in 2014 had a lot to say, since the researchers demonstrated through four experiments that walking has a positive effect on the creative thinking that is often lacking. However, his greatest contribution was the dissection of what type of creativity benefits from movement. Specifically, they saw a drastic improvement in the divergent thinkingwhich is nothing more than the ability to generate multiple new and original ideas from a stimulus, but a null or even slightly detrimental effect on the convergent thinkingwhich is the ability to arrive at a single correct or logical answer. The best. With all this we come to the conclusion that walking is an extraordinarily powerful tool for brainstorming or starting a project from scratch, but it is not the best strategy if what we need is to solve a complex mathematical equation or find the exact answer to a test. In the real world. This study laid the foundation in a controlled environment where, in fact, part of the experiments showed that the effect persisted when walking on a treadmill in front of a blank wall, ruling out that the visual stimulus in the environment was the only one responsible. But when we leave here, the logical thing we think is that everything can end up changing. And to answer this, a study published in 2024 in American Psychologist took research out of the lab thanks to sensors and real-time evaluations in 157 young adults and analyzed daily steps in an everyday context. Your results confirmed that both acute walking episodes and the regular habit of going for a walk are directly associated with greater performance in verbal creative ideation. That is, the effect was not a laboratory anomaly, but rather translated perfectly to the real world. And it is confirmed again. This same year, a systematic review published in the journal PLOS ONE analyzed 23 independent studies where 1,036 participants were grouped together. Their conclusions indicated that there is a large and statistically significant effect between walking and having better divergent thinking. But there is still no evidence regarding convergent thinking. Images | Emma Simpson In Xataka | Psychology knows that feeling pleasure in the misfortune of others is not a psychopath: it is a very “human” reaction.

Tomorrow the best science fiction series of the moment returns, with a twist in its story that has given it a perfect score

This July 3 comes to AppleTV the third season of ‘Silo‘. And this marks the halfway point of the series: in December 2024, Apple confirmed the simultaneous renewal of a third and fourth season, and stated that the latter was conceived as the definitive closure of the story. We are halfway through this exciting series, and everything seems to indicate that we are once again facing an event: the third season boasts 100% from critics on Rotten Tomatoesthe best so far. ‘Silo’ is set in a toxic and uninhabitable future in which 10,000 people live locked in a gigantic 144-story underground silo, with no memory of how or why they got there, and firmly believing that going outside means certain death. The series follows Juliette (Rebecca Ferguson), a low-level engineer who, after the suspicious death of the sheriff, begins to unravel the thread of lies that sustain the social order of the underground complex. In this new season, Juliette has become mayor of Silo 18, but with memory gaps about what she has experienced outside, with the community trying to rebuild itself after the rebellion of the previous season and facing a new threat. In parallel, the season opens a second timeline set centuries agocentered on a congressman and a journalist who begin to uncover the conspiracy that would end up leading to the construction of the silos. This half “from the past” largely adapts ‘Shift’, the second book of Hugh Howey’s trilogy on which the series is inspired and which Minotauro has published in Spanish, and is the main novelty of this season compared to the previous two, focused almost exclusively on Juliette’s present. The praise for this new season has not stopped appearing in the last week, and the originality of the time jump stands out above all. The setting, interpretations and, as always on Apple TV+, ambition of the series, make it an absolutely essential event for science fiction lovers. In Xataka | Today one of the most acclaimed Marvel superhero series of all time returns to Disney+

We believed that sleeping with our dog or cat was a comforting and healthy idea. Science shows that it destroys your night’s rest

More than ten years ago it was carried out a survey of 23,000 pet owners. There were curious data: a quarter of them admitted treating their pet as if they were small children and a little less than 75% admitted keeping photos of them. But perhaps the most striking thing is that half admitted sleeping with their pets. There is no memory of a sociological division of this magnitude since the potato omelet. So we’ve been wondering what science said about sleeping with your dog or cat. Do people really sleep with their pets? The truth is that sleep researchers haven’t paid much attention to the topic. We have a lot of pseudo-theories about ‘dominance’ or ‘doggy soul’ that are very successful on reality television, but the research in the ‘human-animal co-sleeping‘was a relatively forgotten area that in recent years has experienced a boom. As we have spoken on other occasions, sleep is a more cultural phenomenon than it seems and changes a lot between regions and times (Blunden, Thompson and Dawson; Worthman and Melby; Munroe, Munroe and Whiting). In the same way that it was relatively recently that Western societies separated resting places by age (children and adults), it was only relatively recently that spaces between humans and animals were completely separated. In fact, there are many cultures in which these coexistence practices are maintained naturally. And the most solid studies (Albert and Bulcroft; Westgarth et al.; Overgaauw) coincide with the survey in that there is a 50% split in co-sleeping with dogs and cats – which are the most common nocturnal companions (Albert and Bulcroft). And it’s curious because Since 2018 we know that dogs are less annoying than cats. In this sense, it cannot be said that the results of the survey are surprising. Research maintains that humans continue to show a strong attachment to their pets and are often considered important members of the family (Archer). As it says Smiththis is not free: animals are a source of support, affection, comfort, security and stability which can have important health benefits. It is true that the size of the pet has a lot to do with it and if we look in more detail (for example, in dogs) we see that 76.85% of Yorkshire Terriers or 62.96% of Chihuahuas sleep with their owners compared to 18.18% of Saint Bernards or 30.27% of Labradors. Even so, the percentage of Saint Bernards is a very high percentage. In addition to what Eckstein already pointed out, other factors that intervene are the number of children in the family (more likely where there are no children – Albert and Bulcroft) or gender (more likely with women). Some problems of sharing a bed with pets Research suggests there are some potential problems with sharing bedding with animals. Health risks. These include some immune responses, allergies, asthma or hypersensitivity pneumonitis; Bites and scratches can also occur through which infectious diseases associated with domestic animals can be contracted (Plaut, Zimmerman and Goldstein). Those most susceptible to these types of problems are young children, pregnant women and immunocompromised patients (Smith). However, the overall health risks are very low; almost insignificant if the animals receive medical care and maintain proper hygiene. Sleep problems. In general, the main problems related to sleep quality involve companions (kicking, snoring, etc.) and children, but pets also play an important role. Without going any further, a study from the Mayo Clinic found that fifty-three percent of pet owners who slept with their pets had problems resulting from it. Nevertheless, it is difficult to know the real impact of these interruptions because they are very short interruptions that by themselves explain little: however, it seems that Yes, there is a difference between sleeping in the bedroom or in the bed.. This is because interruptions can be related to temperature imbalances between humans and pets; as well as differences in sleep and wake cycles (Campbell and Tobler). If they only sleep in the bedroom, everything becomes easier. Behavior problems in animals. Jagoe and Serpell found that dogs that are allowed to sleep with their owners may experience an increase in aggression and separation-related problems. Effect on interpersonal relationships. Finally, animals can be an important source of conflict and stress in relationships. Coming to generate intimacy problems (Jagoe and Serpell) Should we sleep with our pets? Smith and his research team found that sleeping with pets in the bed had a small impact on sleep quality in the time taken to fall asleep or feeling tired when waking up. However, the authors maintain that the continued practice of co-sleeping with pets indicates benefits of social support, social interaction and personal safetydespite the disadvantages. In general, it seems that science agrees with common sense. Sleeping accompanied by animals can have some problems but always related to previous problems at a health and behavioral level. And, on the other hand, if our pet is healthy, has proper hygiene and a ‘good education’, not only are there no problems, but it can have very positive effects. The evidence has been divided in recent yearsbut remains unanimous in this regard Images | Faith Goble, John Liu, Tony Alter, Jon-Eric Melsæter. Xataka | We have been looking at Noah’s syndrome as a minority and controlled problem for years. we were wrong *An earlier version of this article was published in January 2016

Using umbrellas against the sun is the latest fashion in Spain. Science is clear to what extent it really protects us

It is increasingly common to see how people walk down the street with an umbrella in their hands to protect themselves from the sun. This habit was something that was very internalized among the Asian tourists that we saw in our cities, but with the thermometers breaking records and the sun beating down on the streets, the umbrella is increasingly popular to prevent the sun’s rays from hitting our skin. The underlying idea. As we say, it may be quite logical to cover ourselves from the sun with an umbrella to prevent ultraviolet radiation from freely affecting our skin, something that can cause serious skin problems. But the real question we should ask ourselves here is: does using an umbrella to protect ourselves from the sun really work? It has been investigated. This is something that has already been measured by specialist dermatologists through from a study published in 2013 in JAMA Dermatology. And the results were quite good, since after analyzing dozens of standard hand umbrellas, it was found that they were capable of blocking between 77% and 99% of ultraviolet radiation. But the problem is that not all umbrellas are the same, since the study revealed that black or very dark umbrellas They are the most effective, consistently blocking more than 90% of ultraviolet rays. This is critical, especially for marketers who are already assigning numerical protection factors to umbrellas. as if they were creams. The invisible enemy. The problem of starting to use an umbrella on our streets to protect ourselves can generate a general doubt: can we go outside without sunscreen? Here the resounding answer from dermatologists is no. The key point that the scientific evidence emphasizes is that shade is a partial protective measure. And the sun not only burns us by projecting its rays directly onto our heads from the sky, but there is also what is known as diffuse and reflected ultraviolet radiation. A common effect. To explain this, we must understand that UV rays bounce off the surfaces around us, such as asphalt, sidewalks, pool water, beach sand, or glass in buildings. All that bounced radiation enters through the sides and under the umbrella, directly impacting our exposed skin. This is the same principle that we apply when we go to the beach, where many people, despite being constantly under an umbrella, come home and have several burns on their skin. This is where we clearly see that ultraviolet radiation also attacks despite being under an umbrella. It’s proven. Here a study published in 2017 tested the beach umbrella against a high SPF sunscreen, and the results showed that the group that relied solely on the shade of the umbrella suffered from sunburn. That is why it is always recommended to apply sunscreen before exposing yourself to ultraviolet radiation in order to avoid burns and the rest of the unwanted effects that the sun has on the skin. In Xataka | Science warns of the dangerous success of anti-suncream hoaxes on TikTok: “Despite being a minority, this content is influential”

Science suggests that we are ignoring ultradian rhythms

We have been hearing about the circadian rhythmsand we know well that the blue light from screens before sleeping is bad or that the melatonin sends at night to induce sleep. However, there is a second biological clock that is much less talked about, but which dictates exactly why at 11:30 in the morning we feel invincible, but when 1:00 p.m. arrives we cannot keep our eyes open to work. These are the ultradian rhythms. Its foundation. Far from being an invention of productivity gurus, the existence of these rhythms is deeply rooted in our physiology and hormonal secretionespecially during sleep. But the important thing is that understanding them will not give us superpowers, but according to scientific and neurobiological literature, it does explain how the brain “battery” works. What are they? To understand ultradian rhythms, we must travel to the 1950s and focus on Nathaniel Kleitman, the pioneering researcher who discovered REM sleep. At this point, Kleitman and his team realized that we don’t sleep in one uniform stretch, but rather our night is divided into cycles that last between 90 and 120 minutes. During each cycle, we go through several stages, such as light sleep, deep sleep and also REM sleep. Once we reach this we start again, and this is what is known as the ultradian rhythm. It is maintained. Logic could make us think that this cycle remains only in sleep, but here Kleitman postulated the Basic Rest-Activity Cycle (BRAC). With this theory on the table, it was proposed that this same 90-minute clock does not turn off when we wake up, but rather that during the day our brain continues to operate in waves. In this way, we can see that we have peaks of high alertness and concentration of about 90 minutes, followed by valleys of fatigue of about 20 minutes where the body requires a rest to recover. A hormonal issue. Something that is well known is that the secretion of hormones is not done continuously like an open tap, but in pulses or “peaks” that are synchronized with these 90-minute cycles. For example, growth hormone is essential to repair our tissues and its maximum peak is linked to the stages of deep sleep that occur in the first ultradian cycles of the night. This means that, if these first 90-180 minutes of sleep are disturbed, the body will not repair itself in the same way. Respect the ultradian rhythm. Among the tips we can follow to control these cycles is the 90/20 rule at work. And if we assume Kleitman’s BRAC cycle, the optimal window of mindfulness lasts about 90 minutes and then we enter a moment of fatigue where we do not perform in the same way. That is why it may be best to work for 90 minutes and then take a real break away from the work screen, for 15-20 minutes to reset this cycle. But the moment of waking up is also essential, since feeling tired when getting out of bed usually occurs because the alarm went off in the middle of the slow wave sleep phase or deep sleep. That is why calculating the hours of sleep in blocks of 90 minutes increases the probability that we will wake up at the end of these cycles and be able to get up with much more energy. Images | Vitaly Gariev In Xataka | Neither red light makes you sleepy, nor white noise is magic: what science says about the trend of “hacking” the bedroom

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