AIM: Adopting the aerobic exercise prescription to intervene on the simple obesity of university students, to observe the effect of reasonable aerobic exercise matching static exercise prescription for simple obesity under diet intervention. METHODS: Twenty male undergraduates with severe simple obesity in 2003 grade of Nanhua University from March to June 2004. Ten volunteers were selected randomly as exercise group, and other 10 as control group. The body mass, blood pressure, body lipid and blood lipid (total cholesterol was tested with enzyme test kit; triacylglycerol was tested with acetylacetone micromethod) were detected in the 20 undergraduates. Exercise prescription was given to the 10 students of exercise group. It included 4 phases: 1 to 5, 6 to 10, 11 to 14, 15 to 18 weeks, training for 50 to 80 minutes every week, frequency of exercise was 3 to 5 times a week for 18 weeks totally. Exercise intensity ranged mainly: target heart rate (times per minute) = maximal heart rate (50% to 70%), maximal heart rate (times per minute) = 220-age. Principal content was static exercise and aerobic running adding some student-liked items. Distance and limited time were pushed with the training phase, and the intensity increased gradually. During the training there was no diet intervention. The undergraduates in the control group joined the physical education and physical activity normally without changing the life style and rhythm. The changes of body mass, body lipid, blood pressure and blood lipid were observed in undergraduates of the two groups before and after exercise. RESULTS: Twenty male undergraduates with severe simple obesity who joined the observation were all involved in the result analysis, without dropout. The body mass, body lipid and blood pressure decreased after training for 18 weeks in the exercise group as compared with the control group. The difference of body mass, systolic pressure and diastolic pressure was significant (72.8 +/- 3.4, 87.9 +/- 2.9 kg; 114.0 +/- 2.25, 124.5 +/- 3.0 mmHg (1 mmHg = 0.133 kPa); 66.8 +/- 3.8, 69.8 +/- 3.0 mmHg, t = 4.65, 3.76, 3.27, p < 0.05). After training for 18 weeks, mean serum total cholesterol, triacylglycerol, low-density lipoprotein cholesterol, apolipoprotein B and apolipoprotein AI decreased in different degree. The triacylglycerol, high-density lipoprotein cholesterol, apolipoprotein B had significant difference as compared with that before exercise (1.2 +/- 0.1, 1.9 +/- 0.2 mmol/L; 4.3 +/- 0.0, 0.9 +/- 0.0 mmol/L; 0.5 +/- 0.0, 0.8 +/- 0.0 g/L; t = 3.67, 5.31, 5.11, p < 0.05). CONCLUSION: The aerobic exercise matching quiet dint practice is helpful to decrease the blood pressure, body lipid and body mass of undergraduates with simple obesity, enhance motor ability and ameliorate the level of metabolism of blood lipid tinder the non-food intervention condition.

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