Can the Placebo Effect Enhance Athletic Performance?

The placebo effect has been looked down on, scoffed at, and written off as useless because it is “all in your head.” But lately there has been a shift in that thinking, and we are starting to see the power that the placebo holds in athletic performance.

Brock Armstrong
8-minute read
Episode #384

Image of pills and dumbbells

The placebo effect may actually be an integral part of what we call the Champion’s Mindset.

Randomized trials and dedicated placebo studies have given us a much deeper understanding of the placebo effect and all of its complex parts. Researchers have even used things like brain scans to show that there could be a physiological, not just psychological, explanation for it. While there is still much about placebos that we don’t understand, what is becoming clear is that there is more to it than simple deception.

Doctors worry that a more broad acceptance of the placebo effect could be used to justify useless treatments or procedures. On the other hand, in sport and fitness, there is a growing idea that the placebo effect may actually be an integral part of what we call the Champion’s Mindset. This idea has many scientists, coaches, and athletes devoting more time to figuring out how they can use it to their advantage.

What is the Placebo Effect?

First, let’s lay out what exactly we are talking about here. The word placebo is a late 18th-century Latin term which literally means ‘I shall please.’ In modern terms, the definition of a placebo is: a harmless pill, medicine, or procedure prescribed more for the psychological benefit to the patient than for any physiological effect. Or, as they explain at Harvard Medical school: “A favorable response to an intervention—a pill, a procedure, a counseling session, etc—that doesn't have a direct physiological effect.” Take note of the words "harmless" and “direct.” It is important to keep these in mind as we proceed because there are ways that placebos could be harmful and also, as I will get to shortly, there are many indirect effects found.

The most obvious example of a test that involves the placebo effect goes like this: A study participant is given a sugar pill and told it will have a specific effect on them. Even though it is a sugar pill, that individual (or group of individuals) experience some effect or improvement in their condition. Sound familiar? Well, this idea has moved beyond medicine, and similar studies are also being done in sport and fitness.

Placebo effects of varying strengths are reported in studies from weightlifting to endurance sports and everything in between. The findings from these studies suggest that many psychological variables like motivation, conditioning, and outcome expectancy mix with some less tangible physiological variables to create some significant factors for both positive and negative outcomes in sport.

More research is needed, but one thing is certain - they work.

It is not clear how placebos improve athletic performance because the effects are so wide-ranging. In some sports, it could be reduced anxiety that leads to lower muscle tension which makes the body move more efficient and fluid. Or it could be a reduction in perceived exertion and even pain. Or taking a placebo may simply plant a subliminal thought that motivates you to push yourself harder. More research is needed, but one thing is certain—it works.

Placebo in Cycling

I think that one of the greatest examples of the placebo effect at work in sport is contained in a study called Placebo effects of caffeine on cycling performance. What makes this study special is that the researchers explored the placebo effect in cycling performance using both quantitative and qualitative methods.

They took six well-trained male cyclists and had them perform two baseline and three experimental 10-km time trials (which is where a cyclist rides as hard as they can, alone, for 10 km). The cyclists were told that in the experimental trials they would each receive either a placebo, 4.5 mg/kg caffeine, or 9.0 mg/kg caffeine, at random. But in reality, placebos were given during all the experimental trials—there was no caffeine in any of the pills. The researchers also conducted interviews with the cyclists before and after revealing the decaffeinated deception to explore the subjects' experience.

Now comes the coolest part of this study. Not only was there a placebo effect noted during the study but there was a “dose-response relationship” as well. The cyclists produced 1.4% less power than baseline when they believed they had ingested a placebo, 1.3% more power when they believed they had ingested 4.5 mg/kg caffeine, and whopping 3.1% more power when they believed they had ingested 9.0 mg/kg caffeine. On top of that, during the interviews, all the cyclists reported feeling varying caffeine-related symptoms.

The placebo effect isn’t just an on or off factor, it can be dose-dependent.

At the conclusion of the study, the researchers wrote: “Quantitative and qualitative data suggest that placebo effects are associated with the administration of caffeine and that these effects may directly or indirectly enhance performance in well-trained cyclists.” Which means that the placebo effect isn’t just an on or off factor, it can also be dose-dependent. How cool is that?

Can You Give Yourself a Placebo?

Common reasoning behind the success of the placebo effect is that it works because the recipients don't know that they are getting a placebo. It’s all about deception. But what happens if you know you are getting a placebo?

Well, a 2014 study published in Science Translational Medicine delved into this by testing people's reaction to a migraine medication. One group of migraine sufferers took a drug labeled correctly with the name of the drug, another group took a pill that was clearly labeled "placebo," and a third group was simply left to suffer through their migraine. At the end of the study, the researchers found that the bottle that was clearly marked as a placebo was still actually 50% as effective as the real drug.

The researchers were left guessing why this was and eventually came to the conclusion that a driving force beyond this paradoxical response was a byproduct of simply taking a pill. The migraine sufferers were able to activate their body’s natural pain-killing defenses by simply taking a pill.

We see this again and again in the supplement business as well. People pop a vitamin because they heard that it gives them better skin, clearer thoughts, or reduced stress and low and behold, it works. Despite the fact that there is very little scientific evidence that the ingredients do anything at all. And to add insult to injury, there is growing evidence that the supplements many people rely on have a four out of five chance of not containing what was listed on the label at all. So even if the ingredient does have some known effect, it may not be present in that capsule you bought at your local supplement store.


All content here is for informational purposes only. This content does not replace the professional judgment of your own health provider. Please consult a licensed health professional for all individual questions and issues.

About the Author

Brock Armstrong Get-Fit Guy

Brock Armstrong was the host of the Get-Fit Guy podcast between 2017 and 2021. He is a certified AFLCA Group Fitness Leader with a designation in Portable Equipment, NCCP and CAC Triathlon Coach, and a TnT certified run coach. He is also on the board of advisors for the Primal Health Coach Institute and a guest faculty member of the Human Potential Institute.