BLOOD COMPONENTS OF MIDDLE AND OLD AGED RUNNERS IN MARATHON RUNNING / 体力科学

ABSTRACT

The purpose of this study was to investigate the changes of blood components of middle and old aged runners in marathon running. The results were as follows.<BR>1) Mean running time of marathon was 250 min. Some of subjects did last spurt.<BR>2) Change of body weight was -4.8%. RBC, Hct, and Hb were changed by -4.8%, -4.4%, and -4.7% respectively. The decrease of plasma volume was 7.8% according to Dill's method.<BR>3) Blood glucose was 112 mg/dl at rest and decreased to 70 mg/dl after running. The glucose level of five subjects was in range from 59 to 50 mg/dl.<BR>4) The increase of L.A. was 52%. The L.A. after running tended to correlate to the running speed at last spurt.<BR>5) T.G. significantly decreased after running. On the contrast, FFA increased by 323%. This increment of FFA correlated to mean running speed (r=0.681, P<0.05) .<BR>6) The increments of GOT, GPT, and LDH were 71%, 62%, and 61% respectively, The decreases of LDH-1, 2 and increases of LDH-4, 5 were found after running. Furthermore, AGOT and 4GPT correlated to the running speed at last spurt or L.A. after running.