Effects of 8-week Endurance Exercise on Post-exercise Systolic Blood Pressure Recovery,Body Composition and Exercise Capacity of Obese Patients

Methods:Sixty-three obese patients were randomly divided into exercise group (n= 35) and control group (n=28) to observe the effects of 8-week aerobic exercise on post-exer- cise systolic blood pressure recovery (PESBPR) , body composition and exercise capacity in obese patients and to explore the relationship between PESBPR and body composition, exercise capacity.Subjects in exercise group performed 8-week aerobic exercise prescription and those in control group maintained there routine daily life.Before and after experiment, body composition including fat mass (FM) , fat-free mass (FFM) and percentage of body fat (BF%) were con- ducted by dual-energy X-ray absorptiometry (DXA) , while PESBPR defined as the ratio of the third minute PESBPR to 1minute PESBPR (the third minute systolic blood pressure recovery ratio, rSBPR) and exercise capacity including maximal oxygen uptake (VO2 max) , maximum power (MP) and exhaust time (ET) were determined by symptom-limited exercise test.Re- sults:Partial correlation analysis revealed that rSBPR positively correlated with BF% (r= 0.412, P<0.01) and negtively correlated withVO2 max (r=-0.475, P<0.01) , MP (r=-0.366, P<0.01) and ET (r=-0.308, P<0.01) .After test of 8-week intervention, body weight (P<0.05) , BMI (P<0.05) , FM (P<0.01) , BF% (P<0.01) , rest SBP (P <0.05) , SBPmax (P<0.01) , rSBPR (P<0.05) and incidence of delayed PESBPR reduced andVO2 max (P<0.05) , MP (P<0.05) and ET (P<0.01) significantly increased in ex- ercise group compared with pre-test, but all the indexes in control group showed no significant- ly different (all P>0.05) .Especially in exercise group, there existed positive correlation of change in rSBPR and change in BF% while negtive correlation of change in rSBPR and change inVO2 max.Conclusion:1) Positive correlation existed between rSBPR and BF% while negative correlation between rSBPR and exercise capacity, suggesting rSBPR could be modifiable cardio-vascular risk factor for obese patients;2) Eight-week aerobic exercise significantly improved body composition, enhanced exercise capacity, thus downregulating rSBPR and incidence of de- layed PESBPR in obese patients.