The Relationship between Serum Creatine Phosphokinase Activity and Labor Intensity / 日本農村医学会雑誌

ABSTRACT

The relationship between serum creatine phosphokinase (CPK) activity and labor strength was examined.<BR>Our epidemiological study showed thar the serum CPK activity in a group of men who worked over ten hours was significantly higher than that in the other groups who worked less than ten hours. In women, the serum CPK activity in a group who worked over seven hours was significantly higher than that in the other groups. The serum CPK activity in fishermen was significantly higher than that in those engaged in other than fishery.<BR>In a laboratory study, test subjects were divided into 3 groups to perform 3 types (30%, 50%, 70% of VO<SUB>2max</SUB>) of exercise for 6 weeks. A rise in the serum CPK activity was noted in every group during exercise. The mean increase for these groups were 44.0 %, 48.1 % and 67.9 %, respectively.