The Effectiveness of Exercise Prescriptions for Weight Loss in Chinese University Students: A Systematic Review and Meta-analysis

Obesity is a condition where the body carries more fat than is healthy, a state that can strain the heart, raise the risk of diabetes, and make daily movement difficult. It is defined by a simple calculation of weight against height, where a score above a certain threshold signals overweight and an even higher score signals obesity. This issue has grown into a global concern, affecting millions of adults and increasingly appearing among young people in universities. For students, the problem is often compounded by a lack of time, limited access to recreational facilities, and the difficulty of staying motivated when exercise feels repetitive or boring. While it is well known that physical activity helps manage weight, the specific recipe for success—how hard to push, how often to move, and for how long—remains a question for many who need to lose weight but do not know where to start.

A new systematic review led by researchers at the University of Warwick and Qingdao Sport Group in China seeks to answer that question by looking at what has already been tried. The team gathered and analyzed eight different scientific studies that tested specific exercise plans on overweight and obese university students in China. These students, mostly in their early twenties, were healthy enough to exercise but carried extra weight that put them at risk. The researchers focused on "exercise prescriptions," which are not just general advice to "move more," but detailed programs that specify the type of activity, the intensity, the frequency, and the duration. By combining the results of these eight studies, which involved a total of 681 students, the author aimed to find a clear pattern in what actually works to lower body mass index, reduce body fat, and improve blood health.

The analysis revealed that structured exercise plans are highly effective for this group. When students followed a prescribed routine, their body mass index dropped significantly compared to those who did not exercise or followed a non-targeted plan. The most successful programs shared a common set of characteristics. They typically lasted for eight to twelve weeks, with students exercising three to five times a week. Each session lasted between twenty-eight and sixty minutes. The intensity of the exercise was crucial; the most effective plans required students to work at a level where their heart rate reached between forty and ninety-five percent of its maximum, or where their oxygen consumption hit fifty to ninety percent of their peak capacity. This range covers everything from moderate, steady-paced activities to high-intensity bursts of effort.

The type of exercise mattered as well. The studies included a variety of methods, from walking on treadmills and riding stationary bikes to practicing Tai Chi and performing high-intensity interval training, which involves short, intense bursts of activity followed by brief rest periods. The results showed that high-intensity training often produced the fastest and most dramatic reductions in body fat and body mass index. For instance, one study using a specific high-intensity format saw body mass index drop by nine percent in just twelve weeks. Another study found that high-intensity interval training reduced triglycerides, a type of fat in the blood linked to heart disease, by more than half in the exercise group compared to a smaller drop in the control group. Even when the intensity was lower, such as with Tai Chi or steady walking, the students still saw improvements in their body composition and blood pressure, provided they stuck to the schedule.

The researchers also noted that the way exercise is delivered can influence whether students stay engaged. One study found that adding virtual reality glasses and music to a cycling session made the activity more appealing and led to greater weight loss than cycling alone. This suggests that for students who struggle with motivation or find exercise boring, making the activity more entertaining can be a powerful tool. However, the review also highlighted that not every student can handle the same level of effort. While high-intensity training is often the most effective for rapid weight loss, it may be too demanding for those who are completely new to exercise or have poor physical fitness. For these individuals, the study suggests that lower-intensity, longer-duration activities, such as walking for an hour three times a day, can still yield significant health benefits over time.

Despite these positive findings, the author cautions that the results come with some limitations. The studies varied in their design, and because the students knew they were exercising, it was impossible to hide the intervention, which can introduce bias. Additionally, the number of studies was relatively small, and many focused on specific regions or groups, such as only male students, which means the findings might not apply perfectly to every single person. The review also noted that some studies did not track what the students ate, leaving open the possibility that diet changes, rather than exercise alone, contributed to the weight loss. Nevertheless, the consistency of the results across the eight studies provides a strong foundation for recommendations.

The final picture that emerges is one of clear, actionable guidance. For overweight university students in China, and likely elsewhere, the path to better health involves a commitment to regular, structured movement. The sweet spot appears to be exercising three to five times a week for about half an hour to an hour, pushing the heart rate to a moderate or high level. High-intensity interval training offers a time-efficient route for those who can handle it, while Tai Chi and steady walking provide effective alternatives for those who need a gentler start. By tailoring these prescriptions to the individual's fitness level and interests, universities and health professionals can help students not only shed excess weight but also build a habit of physical activity that supports their long-term health.