... and HDL-C, but did not eliminate the relationship. Hypothetically, inclusion of other, as yet unknown, factors might possibly weaken the association. As inferred from the study of Jylha et al ... questioned whether the subjects knew their serum lipid values, and the effect they might have on their health, and thereby influence their health rating. There is no direct variable in the questionnaire ... Obviously, good health is a prerequisite for engaging in physical activity, whilst, on the other hand, physical activity may promote good health. In any instance, also in the present study there...