Effect of circuit training on body composition, physical fitness, and metabolic syndrome risk factors in obese female college students / 中国学校卫生

Objective@#To investigate the effect of a 12-week circuit training program on health-related physical fitness and metabolic syndrome risk factors in obese female college students,and to provide reference for targeted interventions.@*Methods@#Sixty subjects with body mass index (BMI) over 28 kg/m2 were randomly allocated to control group ( n =30) or exercise group( n =30). Participants of control group maintained daily lifestyle while those of exercise group performed circuit training program 3 times per week for 12 weeks. Parameter of body composition (including back strength, sit-up, sit-and-reach, and 1 600 m running time), health-related physical fitness (including body height, body weight, BMI), percentage of body fat (PBF) and lean body mass (LBM) and metabolic syndrome risk factors [including waist circumference(WC), fasting blood glucose(FBG), triglyceride(TG), total cholesterol(TC), highdensity lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C)] were tested before and after the experiment.@*Results@#After intervention, body weight, BMI, PBF decreased, back strength, sit-up, sit-and-reach, and 1 600 m running time performance increased( t =2.14, 2.21, 2.48, -7.21, -7.69, -7.01, 4.83, P <0.05), WC, TG, TC reduced in exercise group compared with pre-test( t =2.89，4.54，2.71， P <0.05), whereas all parameters in control group showed no significantly different( P >0.05).@*Conclusion@#Regular circuit training improved body composition, enhanced physical fitness and may contribute to prevent metabolic diseases.

Effects of smoking and aerobic exercise on risk factors of metabolic syndrome among male college students / 中国学校卫生

Objective@#The aim of this study was to investigate the effects of smoking and aerobic exercise on metabolic syndrome risk factors among male college students.@*Methods@#Eighty male college students were randomly selected from Global Youth Tobacco Survey and assigned to exercise smoker(ES), non-exercise smoker(NES), exercise non-smoker(ENS) and non-exercise nonsmoker (NENS) groups with sample size of 20 in each group. Subjects in NES and NENS groups maintained daily lifestyle while those in ES and ENS group performed aerobic exercise 5 times per week for 8 weeks with exercise intensity set at 50%~80% of heart rate reserve. Before and after experiment, risk factors for metabolic syndrome were assessed including systolic blood pressure (SBP), diastolic blood pressure (DBP), waist circumference (WC), fasting plasma glucose (FPG), triglyceride (TG) and high-density lipoprotein cholesterol (HDL-C).@*Results@#After experiment, compared with ENS and NENS group, WC, SBP, DBP, FPG and TG increased while HDL-C decreased (P<0.05) in ES and NES groups. Compared with pre-experiment, SBP and DBP significantly decreased in ENS group(P<0.05), increased in NES group (P<0.05) while no statistically significant in ES and NENS group(P>0.05); WC was significantly reduced in both ES and ENS groups(P<0.05), increased in NES group (P<0.05) while no statistically significant in NENS group (P>0.05) after experiment. Compared with NES and NENS groups, △WC in ES and ENS group decreased (P<0.05); compared with other groups, △SBP and △DBP increased in NES groups while decreased(P<0.05) in ENS group.@*Conclusion@#Smoking is associated with higher level of metabolic syndrome risk factors, while aerobic exercise is associated with lowering blood pressure and WC level in male college students.