To what extent can weekly video game hours be considered a simple pastime, and when do they begin to take a toll on health? A new scientific study puts a number on that approximate limit and indicates that, beyond a certain point, young people's diet, sleep, and body weight can be compromised.
The research, led by Curtin University (Australia) and published in the scientific journal Nutrition , points to a very specific threshold: those who dedicate more than 10 hours per week to video games show worse indicators of eating habits, rest, and weight than those who spend less time playing. This isn't about demonizing gaming, but rather about focusing on excessive screen time.
How the investigation was carried out
The study focused on 317 university students from five higher education institutions in Western Australia, with an average age of around 20. They all answered questionnaires about their gaming time and various aspects of their lifestyle, allowing researchers to draw up a fairly detailed profile of their habits.
Based on the reported weekly gaming hours, the team classified participants into three distinct groups: “low gamers” (between 0 and 5 hours per week), “moderate gamers” (from 5 to 10 hours), and “high gamers” (more than 10 hours per week). This division served as the basis for later comparing the health differences between the groups.
Once the groups were established, variables such as diet quality , body mass index (BMI) , and sleep quality were analyzed . Validated tools were used for this purpose, including specific dietary questionnaires and the well-known Pittsburgh Sleep Quality Index (PSQI) , which measures rest and sleep disturbances over the past month.
The aim was to determine if weekly gaming time was associated with measurable changes in these health indicators. In other words, whether spending many hours with a console or computer actually led to poorer eating habits, poorer sleep, or weight gain.
The researchers start from a reality that also affects young Europeans and Spaniards: digital leisure has become normalized in university life, and a good part of free time is divided between video games, social networks and online content , which can displace other healthier routines.
The 10 o'clock threshold: when the landscape changes
The study's main finding is that the biggest leap doesn't occur between those who play infrequently and those who play moderately, but rather when they exceed 10 hours of gaming per week . Up to that point, their health profiles were surprisingly similar.
According to Professor Mario Siervo of Curtin University's School of Population Health, low and moderate players showed similar patterns in terms of weight, diet, and sleep. The clear difference appeared in the group that exceeded 10 hours per week , where worse results were observed in virtually all areas analyzed.
The authors emphasize that the risk lies not so much in playing video games as a leisure activity, but in intensive and continuous use . In other words, the problem isn't that a young university student plays a few games a week, but that the console or computer becomes the dominant activity of their free time, displacing other health-protective behaviors.
This point aligns with the reality for many European students, where academic pressures, stress, and long hours in front of the computer already shape their daily lives. If you add to that a significant amount of time spent playing video games , the opportunity for physical activity, cooking leisurely, or maintaining regular sleep schedules becomes even more limited.
It is worth clarifying that the researchers speak of an approximate inflection point , not a rigid boundary: it is not that at hour 11 everything automatically deteriorates, but that from then on the probability of problems with diet, weight and rest appearing begins to increase.
Diet and weight: how playtime influences it
One of the areas where the differences between groups were most evident was the quality of their diet . Young people who played more than 10 hours a week had lower scores on scales that assess whether their diet is balanced and varied.
In practice, this translates to increased consumption of unhealthy snacks , fast food, sugary drinks, and energy drinks among children , as well as foods high in fat and salt, and a lower intake of fruits, vegetables, and other fresh produce. The study indicates that for every additional hour of gaming per week, a decrease in diet quality scores was observed, even after adjusting for stress, physical activity, and other lifestyle factors.
The differences aren't limited to what they eat; they're also reflected in body weight . The "tall players" group registered an average BMI of 26,3 kg/m² , above the range considered healthy. Conversely, the groups with less playing time maintained more desirable figures, with average BMIs of 22,2 and 22,8 kg/m² among the low and moderate players, respectively.
Furthermore, among those who played more than 10 hours per week, significantly higher rates of overweight and obesity were observed . In this segment of intensive players, approximately 38% were overweight and 24% were obese, compared to 21,1% and 4,9%, respectively, of participants who played less than 10 hours per week.
The authors point to a fairly intuitive mechanism: if much of your free time is spent sitting in front of a screen, it's easier to reduce physical activity and resort to fast food. Over time, this combination of sedentary behavior and poor diet tends to show on the scale and in body composition.
However, the research team points out that the work was carried out with young Australians , so more studies focused on Spain and other European countries would be needed to confirm whether these figures are replicated in a similar way, although digital leisure and eating patterns have quite a few things in common.
What happens to sleep when screen time increases?
Sleep was the other major focus of the research. The study shows that, overall, all groups of students reported room for improvement in sleep quality . Even so, Pittsburgh Sleep Quality Index scores were clearly worse in the participants who played the most games.
Moderate and heavy gamers reported more nighttime awakenings, difficulty falling asleep , and a feeling of insufficient rest compared to the low-frequency gamer group. In the questionnaires, the high-frequency group achieved an average PSQI score of around 7 points , while the less frequent gamers scored around 6 points, a difference that indicates more fragmented and lower-quality sleep.
The study found a significant link between gaming hours and sleep disruption . The more time spent playing video games, the greater the likelihood of going to bed late, playing until the early hours of the morning, or having sleep disrupted by screen light and the game's own activation.
Experts point out that getting caught up in the "just one more game" mentality or prolonged late-night sessions can disrupt the biological clock , shifting bedtime and reducing actual sleep hours. In the medium term, this lack of quality rest ends up affecting academic performance, mood, and concentration.
In the European context, where a significant portion of students combine studies, work, and digital leisure, this pattern of irregular and short sleep duration is becoming an emerging public health problem, in which the intensive use of screens, including video games, plays a significant role.
What the study on causality says (and doesn't say)
Although the data is striking, the researchers are cautious in their interpretation. The Curtin University team emphasizes that their work does not demonstrate a direct cause-and-effect relationship between video games and problems with diet, sleep, or body weight, but rather highlights clear associations between excessive gaming and an increase in risk factors.
In other words, the study doesn't claim that video games, on their own, cause obesity or insomnia. What it suggests is that intensive and uncontrolled use is linked to less healthy behaviors: more calorie-dense snacking, less physical activity, and more irregular sleep schedules.
The authors explain that there could be underlying factors influencing both gaming time and health habits. For example, young people with more stress, less social support, or poorer time management might turn to video games more frequently while paying less attention to their diet and rest.
For this reason, the research team believes it is necessary to conduct further longitudinal studies and studies in other geographical contexts, including European countries, to determine the extent to which excessive gambling acts as a direct cause or as a marker of other lifestyle problems.
Even with these precautions, the pattern that is repeated in the results is quite consistent: up to low or moderate levels , the game seems to fit reasonably well into a healthy lifestyle; when the 10-hour threshold is exceeded, the risk indicators begin to increase.
What habits does the study suggest for healthier gaming?
Beyond presenting the data, the research offers a series of practical recommendations to reduce the negative impact that excessive hours of video games can have on the health of young people.
The first step is to try to keep gaming time at moderate levels . This isn't about banning video games, but about preventing them from becoming the dominant activity of the week. In practical terms, this means making sure the weekly total doesn't consistently exceed 10 hours.
It's also recommended to avoid playing games late at night , especially on weekdays or school days. Turning off your screen earlier and setting aside some time without devices before bed can help improve sleep quality and allow your body to prepare for sleep.
The study emphasizes the importance of taking regular breaks during gaming sessions, getting up, stretching your legs, and taking the opportunity to hydrate or have a healthier snack. Incorporating breaks at regular intervals not only improves circulation and posture but also reduces the risk of losing track of time.
In terms of food, the authors suggest replacing typical ultra-processed snacks with more balanced options: fresh, washed, ready-to-eat fruit, natural nuts, yogurt, or simple sandwiches with basic ingredients. This way, the game becomes less tied to fast food and high-calorie options.
Finally, young people are encouraged to set aside a consistent amount of time each week for physical activity , whether it's organized sports, walking, cycling, or working out at home. Incorporating these moments of movement can partially offset the time we spend sitting in front of screens.
Researchers point out that university habits tend to persist into adulthood , so learning to balance digital leisure, rest, nutrition, and exercise at this stage is key to avoiding health problems later on. The underlying message is simple: video games can be part of your routine, but it's important to keep an eye on the time spent playing and ensure they don't overshadow the habits that truly protect your health.
