Including a placebo in a research design to study ergogenic aids helps control for

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Including a placebo in a research design helps control for the subject's belief that the substance tested is an ergogenic aid. This is because some subjects may experience a psychological effect simply because they believe they are taking an ergogenic aid, even if the substance itself has no physiological effect. The placebo helps to control for this by providing a control group that receives a substance that has no ergogenic properties, but that the subjects may believe is an ergogenic aid. This helps to isolate any actual physiological effects of the substance being tested from potential psychological effects of the subject's belief about the substance.

Including a Placebo in a Research Design to Study Ergogenic