Research shows that Malaysian university students who sleep more hours and eat regular meals have better grades, while those drinking sugary beverages frequently have lower academic performance. According to Gram Research analysis of 431 students, those eating 3-4 meals daily were nearly twice as likely to achieve high grades, and students drinking sweet beverages 3 times per day had significantly lower odds of academic success. While this cross-sectional study demonstrates these associations, it cannot prove that changing these habits will definitely improve grades—other factors may be involved.
A new study of 431 Malaysian university students found that healthy lifestyle habits are connected to better academic performance. Students who got enough sleep, ate regular meals, and avoided sugary drinks tended to have higher grade point averages. The research suggests that universities could help students succeed by promoting healthy eating and sleep habits. While this study shows a connection between lifestyle and grades, it doesn’t prove that changing these habits will definitely improve academic performance—more research is needed to confirm these findings.
Key Statistics
A 2026 cross-sectional study of 431 Malaysian university students found that sleep hours correlated positively with grade point average (correlation of 0.16, P < .001), suggesting students who slept more tended to have better grades.
According to research reviewed by Gram, students eating 3-4 meals per day were 1.92 times more likely to achieve high grades compared to those with irregular eating patterns (95% confidence interval 1.20-3.05, P = .002).
A 2026 study of 431 Malaysian students found that consuming sugary beverages 3 times daily was associated with 67% lower odds of achieving high grades compared to lower consumption levels (P = .020).
Research on 431 Malaysian university students showed that skipping meals was significantly associated with lower academic performance, with meal-skippers having substantially reduced odds of achieving high grades (P = .048).
The Quick Take
- What they studied: Whether healthy lifestyle choices like sleep, eating habits, and exercise are connected to how well students perform academically in school.
- Who participated: 431 Malaysian university students between 18 and 25 years old who answered an online survey about their lifestyle habits from April to June 2020.
- Key finding: Students who slept more hours and ate regular meals had better grades, while those who drank sugary beverages frequently had lower grades. According to Gram Research analysis, students eating 3-4 meals daily were nearly twice as likely to have high grades compared to those with irregular eating patterns.
- What it means for you: If you’re a student, paying attention to your sleep schedule and eating regular meals might help your grades. However, this study only shows a connection—it doesn’t prove that changing these habits will definitely improve your performance. Talk to your school’s health services for personalized advice.
The Research Details
This was a cross-sectional study, which means researchers collected information from students at one point in time (April-June 2020) rather than following them over months or years. Students answered an online questionnaire about their lifestyle habits from the previous 4 weeks, including what they ate, how much they slept, whether they exercised, and whether they used tobacco. Researchers then compared these lifestyle answers to each student’s grade point average (GPA).
The researchers organized students into three GPA groups: Low (below 3.0), Medium (3.0-3.5), and High (above 3.5). They used statistical tests to see if certain lifestyle habits appeared more often in students with higher or lower grades. They also used advanced statistical methods to account for multiple factors at once, similar to how a detective might look at several clues together rather than one at a time.
This type of study is useful for identifying patterns and connections, but it’s like taking a snapshot rather than a video—it shows what’s happening at one moment but can’t prove that one thing causes another.
Cross-sectional studies are valuable because they’re quick and affordable to conduct, making them good for exploring new questions. In this case, the researchers wanted to understand whether lifestyle behaviors in Malaysia are connected to student success. This information can help universities design programs to support student health and academic performance. However, because this is a snapshot study, we can’t be certain that improving sleep or eating habits will definitely lead to better grades—other factors might be involved.
The study included 431 students, which is a reasonable sample size. However, all information was self-reported, meaning students answered questions about their own habits, which might not always be completely accurate. The study was conducted during a specific time period (April-June 2020, during the COVID-19 pandemic), so results might not apply to students in other time periods or countries. The researchers used appropriate statistical methods and checked their results with sensitivity analyses, which strengthens confidence in the findings. The study was published in Medicine, a peer-reviewed journal, meaning other experts reviewed the work before publication.
What the Results Show
The study found three main connections between lifestyle and grades. First, students who slept more hours had better grades—for every additional hour of sleep, grades improved slightly (correlation of 0.16). Second, students who ate more meals per day had better grades—those eating 3-4 meals daily were nearly twice as likely to have high grades compared to those with irregular eating patterns. Third, students who drank sugary beverages frequently had lower grades—drinking sweet beverages 3 times per day was associated with significantly lower odds of having high grades.
Interestingly, the study found that skipping meals was connected to lower grades. Students who regularly skipped meals were much less likely to have high grades. The researchers also found that students with a healthy weight were more likely to have high grades, suggesting that overall health and academic performance may be connected.
One surprising finding was that students who reported good sleep quality had lower grades in the medium and high GPA categories, which contradicts the positive correlation with sleep hours. This suggests that how much students sleep might matter more than how they feel about their sleep quality, or there may be other factors at play.
The study examined several other lifestyle factors. Physical activity and tobacco use were measured but didn’t show strong connections to grades in the final analysis. The timing of meals and snacks also mattered—eating one snack per day was associated with higher odds of having high grades. Coffee consumption was measured but didn’t show a significant relationship with academic performance. These secondary findings suggest that meal frequency and composition are more important than other lifestyle factors for academic success.
This research aligns with existing studies showing that sleep and nutrition affect brain function and learning. Previous research has shown that sleep deprivation hurts memory and concentration, which are essential for academic success. Similarly, studies have demonstrated that skipping meals leads to lower blood sugar, which can impair focus and cognitive performance. However, most previous research on this topic comes from Western countries, so this Malaysian study adds important evidence from a different cultural and educational context. The findings support the growing recognition that student health and academic performance are interconnected.
This study has several important limitations. First, it’s cross-sectional, meaning it shows associations but cannot prove that lifestyle changes cause better grades—other unmeasured factors could explain the connections. Second, all information was self-reported, so students might not remember their habits accurately or might answer differently than their actual behavior. Third, the study was conducted during April-June 2020, during the COVID-19 pandemic, when students were likely studying remotely, so results might not apply to normal school conditions. Fourth, the study only included Malaysian university students aged 18-25, so findings may not apply to younger students, older students, or students in other countries. Finally, the study didn’t measure objective factors like actual sleep using devices or actual food intake using food diaries—it relied on what students remembered and reported.
The Bottom Line
Based on this research, students should aim to: (1) Get adequate sleep each night—the study suggests more sleep hours correlate with better grades; (2) Eat regular meals throughout the day—students eating 3-4 meals daily showed better academic performance; (3) Limit sugary beverages—reducing sweet drinks was associated with higher grades; (4) Avoid skipping meals—regular eating patterns supported better academic outcomes. These recommendations have moderate confidence because the study shows associations but doesn’t prove causation. Universities should consider implementing health promotion programs focused on nutrition and sleep to support student success.
These findings are most relevant to university students, parents of college-age students, and university administrators designing student health programs. Students struggling academically might benefit from examining their sleep and eating habits. However, these findings should not replace professional medical advice—students with sleep disorders, eating disorders, or other health concerns should consult healthcare providers. The recommendations are general lifestyle suggestions and may not apply to students with specific medical conditions.
If students implement these lifestyle changes, they might notice improvements in focus and energy within days to weeks, but academic performance (grades) typically takes longer to improve—usually at least one semester (3-4 months) to see measurable changes in GPA. Consistent habits over time are more important than short-term changes.
Frequently Asked Questions
Does getting more sleep actually help you get better grades?
Research on 431 Malaysian students shows a positive correlation between sleep hours and grades (correlation 0.16, P < .001), suggesting more sleep is associated with better academic performance. However, this study shows association, not proof of causation. Quality sleep supports brain function needed for learning and memory.
How many meals should students eat per day to improve grades?
According to a 2026 study of 431 students, eating 3-4 meals daily was associated with nearly double the odds of achieving high grades compared to irregular eating patterns. Regular meals help maintain stable blood sugar and energy levels needed for concentration and learning.
Can drinking less soda or sugary drinks improve academic performance?
A study of 431 Malaysian students found that consuming sugary beverages 3 times daily was linked to 67% lower odds of high grades. While this shows association, reducing sugary drinks may support better focus and energy, which could benefit academic performance.
What lifestyle changes should students make to get better grades?
Research suggests students should prioritize: getting adequate sleep nightly, eating regular meals (3-4 per day), avoiding meal-skipping, and limiting sugary beverages. These habits support brain function and energy levels needed for academic success, though individual results vary.
Is this study proof that lifestyle changes will improve my grades?
No. This cross-sectional study shows associations between lifestyle habits and grades but cannot prove causation. Other factors may explain the connections. For personalized academic and health advice, consult your school’s academic advisors or healthcare providers.
Want to Apply This Research?
- Track daily sleep hours and meal frequency for 4 weeks. Record bedtime, wake time, and number of meals eaten each day. Also note consumption of sugary beverages (count per day). This mirrors the study’s 4-week measurement period and allows users to identify patterns.
- Set a goal to eat 3-4 regular meals per day and reduce sugary beverage intake to fewer than 3 times daily. Use app reminders for meal times and track sleep duration nightly. Create a simple log showing meals eaten and sleep hours to build awareness of these habits.
- Use the app to track these three metrics weekly: (1) Average sleep hours per night, (2) Number of meals eaten per day, (3) Sugary beverage consumption. Compare monthly trends and correlate with academic performance (test scores or assignment grades) to see if personal patterns match the research findings.
This research shows associations between lifestyle habits and academic performance but does not prove that changing these habits will definitely improve grades. This study was conducted with Malaysian university students and may not apply to all populations. The findings are based on self-reported information, which may not be completely accurate. Students with sleep disorders, eating disorders, or other health concerns should consult healthcare professionals before making significant lifestyle changes. This article is for informational purposes only and should not replace professional medical or academic advice. Always consult qualified healthcare providers or academic advisors for personalized recommendations.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.