Regular physical activity benefits nearly every physiological system. which of the following is not one of the physiological benefits of regular physical activity?

It seems that you have missed the necessary options to answer this question, but anyway, here is the answer. Since regular physical activity benefits nearly every physiological system, the one that is not a physiological benefit of regular physical activity is the decrease in high-density lipoprotein (HDL) cholesterol. Hope this answer helps.

Primary effectit is the most accurate.

Behavioral science is the study of human behaviors and how they can be influenced.  by examining patterns in behavior as well as reactions, individuals with behavioral problems can be more adequately treated, resulting in greater mental health of our society/the public.