Nonselective Beta-Receptor Blocker Effect on High Density Lipoprotein Cholesterol After Chronic Exercise

Abstract

High density lipoprotein (HDL) cholesterol changes were followed in 45 men with coronary heart disease who underwent 12 weeks of monitored aerobic exercise. Twenty-five patients who were taking a nonselective beta-receptor blocking drug (Group 1) did not demonstrate a significant change in HDL cholesterol after exercise (mean difference 2.8 +/- 11.5 mg/dl), whereas patients who had not received a beta-blocking drug for greater than or equal to 3 months (Group 2) showed a significant increase (mean difference 8.4 +/- 5.5 mg/dl; p less than 0.05). However, for those patients in each group who had an initial HDL cholesterol level less than 35 mg/dl before exercise, there was a significant increase in HDL cholesterol levels (mean difference 8 +/- 6.9 mg/dl [p less than 0.02] and 11 +/- 3 mg/dl [p less than 0.001] for Group 1 and Group 2, respectively) and a significant decrease in the low density lipoprotein (LDL/HDL cholesterol ratio (mean difference -1.2 +/- 1.6 [p less than 0.05] and -0.9 +/- 0.57 [p less than 0.001], respectively). Patients in both groups who started exercise with an HDL cholesterol level greater than 35 mg/dl did not show a significant change after exercise. Patients in Groups 1 and 2 achieved similar levels of exercise training after 12 weeks and were closely matched in age, medications, alcohol intake and smoking. The results indicate that among high risk patients (with an abnormally low HDL cholesterol level) exercise training can induce an augmentation of HDL cholesterol in those receiving a beta-blocking drug similar to that of patients not receiving such a drug.