We examined the effect of frequency of habitual physical activity on serum lipid peroxide and lipoprotein in middle and elder aged female. The subjects were 15 trained (trained A (n=7) : less than 2 days a week, trained B (n=8) more than 3 days a week) female and 10 untrained female. Serum triglyceride level was lower in both trained groups than in untrained, and significant difference in these levels was found between trained B and untrained. Level of serum HDL-cholesterol was significantly higher in both trained groups than in untrained.
　LDL-cholesterol / HDL-cholesterol ratio level declined at the higher frequencies of exercise and significant difference in these ratio was found between trained B and untrained. Level of serum lipid peroxide was significantly lower in trained B than in untrained and trained A. In conclusion, the present study seems to suggest that improvement on serum lipid and lipoprotein levels increased with higher frequencies of habitual physical activity. High frequency of habitual physical activity seems to inhibit the degenarative change in the tissues.

DESCENTE SPORTS SCIENCE Vol.12/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE