The More You're Praised, the Less You Want to Do It — Intrinsic vs. Extrinsic Motivation and the Undermining Effect
📖 日本語版 / Japanese version:
Someone tells you "You've lost weight!" and the next week you find yourself skipping the gym without quite knowing why.
It feels contradictory. The praise felt good. So why did it seem to drain something rather than add to it?
This is not a character flaw or a mystery. It is a well-documented phenomenon in psychology called the undermining effect — the tendency for external rewards to reduce the internal motivation that was already there. Understanding it changes how you think about motivation entirely, and it has direct implications for anyone trying to build lasting habits, coach others, or design environments that actually support long-term change.
Two Types of Motivation: The Fuel You're Running On
Psychology distinguishes between two fundamentally different sources of motivation.
Extrinsic Motivation
Extrinsic motivation is driven by external rewards or pressures: praise, prizes, punishments, or social approval.
Working out because your trainer will be disappointed if you miss a session.
Dieting because a wedding is coming up and you want to look a certain way.
Going to the gym because your doctor told you to.
These are real and legitimate drivers. They work — especially in the short term. The problem is structural: when the external reward disappears, the engine stops.
Reach the target weight. Finish the wedding. End the doctor's supervision period. At that point, the answer to "why keep going?" becomes surprisingly empty. The fuel has run out, and if there was nothing else underneath it, the behavior stops. This is why so many people who hit a goal stop immediately afterward — not out of laziness, but because the thing that was actually driving them is gone.
Intrinsic Motivation
Intrinsic motivation comes from inside: genuine interest, the satisfaction of getting better at something, the enjoyment of the activity itself.
Moving because it feels good afterward.
Tracking progress because watching numbers improve is genuinely satisfying.
Showing up because the process itself has become something you look forward to.
This type of motivation does not require external input to sustain itself. It is self-renewing. This is why people maintain hobbies for decades without any prizes or external recognition — the reward is built into the activity itself. When you find this kind of motivation in a fitness or health context, long-term consistency becomes structurally possible in a way it simply is not with extrinsic motivation alone.
The Undermining Effect: When Praise Costs You Something
In the early 1970s, psychologist Edward Deci ran a series of experiments that produced a counterintuitive result. Participants who genuinely enjoyed solving puzzles were divided into two groups. One group was offered monetary rewards for solving the puzzles; the other was not. When the rewards were later removed from the first group, something unexpected happened: their engagement with the puzzles dropped below what it had been before the rewards were introduced.
Adding external rewards to an intrinsically motivated activity had not supplemented the internal motivation — it had replaced it. Once participants began thinking of themselves as doing the puzzle "for the money," the original reason — it was interesting and enjoyable — receded. Remove the money, and there was nothing left to run on.
This is the undermining effect (also called the overjustification effect). External rewards, particularly those that feel controlling, can crowd out the internal motivation that was already present.
Applied to fitness and health: when someone receives strong external praise for a result ("You've lost so much weight!"), the unconscious interpretation can shift from "I exercise because I care about how I feel and what my body can do" to "I exercise to receive approval from others." Once that approval arrives — the praise lands, the goal is achieved — the internal logic says the task is complete. There is no longer a reason to continue.
This is not an argument against ever praising someone. It is an argument for the design of how, when, and what you praise.
What This Means for Counseling and Coaching
In personal training and health counseling, the practical implication is clear: the job is not just to help someone hit a short-term goal. The real work is converting external motivation into internal motivation over time.
Most people arrive with extrinsic drivers. The wedding, the doctor's warning, the desire to look different. These are fine starting points. But if the coaching relationship only ever reinforces external targets — numbers on a scale, a clothing size, a deadline — the motivation structure remains fragile. Hit the target, and you're done.
The counselor's role is to find the internal motivators that are already there (or help develop them) and bring those to the surface.
This happens through questions like:
"How do you feel after a session compared to a day you skip one?"
"When your numbers improved last month, what did that feel like?"
"Has anything changed in your daily life that you've noticed — things you can do now that you couldn't before?"
These questions are not casual conversation. They are designed to help someone identify their own intrinsic reasons for continuing — reasons that do not depend on external praise, a deadline, or anyone else's approval. Once a person connects with those internal reasons, the work of sustaining momentum shifts from the coach to the client. That shift is the goal.
Self-Determination Theory: What Internal Motivation Actually Needs
Deci and Ryan went on to develop Self-Determination Theory (SDT), which identifies three core psychological needs that, when met, support the growth of intrinsic motivation.
Autonomy
The sense that you are choosing to do this — not just following orders or complying with pressure.
In practice: offering choices rather than directives. "Which of these two options works better for your schedule this week?" rather than "Here is your program, follow it." Small choices build the sense of self-direction that keeps internal motivation alive.
Competence
The experience of getting better at something — genuine progress, not just flattery.
This requires setting goals that are reachable with effort. When goals are too distant, people never experience the "I did it" feeling that fuels further engagement. When goals are appropriately calibrated — difficult enough to require real effort, close enough to actually achieve — competence builds, and with it, the desire to keep going.
Relatedness
The sense of being understood and genuinely connected to another person.
A strong relationship with a trainer or coach is not separate from motivation — it is part of its infrastructure. Not in the sense of "I do this for my trainer," but in the sense that growth happening in the context of a trusting relationship feels more meaningful, more real, and more worth continuing.
When coaching environments support all three of these needs, clients stop needing to be pushed from the outside and start pulling themselves forward from the inside. That is when lasting change becomes possible.
The Design of Praise
If external praise can undermine internal motivation, what should you do instead?
The research points in a clear direction: praise process, not just outcome.
"You've been consistent every week" (process) does more to build internal motivation than "You've lost weight" (outcome), because it reinforces the behavior itself rather than the result. The person begins to think of themselves as someone who shows up, who is consistent — and that identity, once established, becomes its own source of motivation.
Similarly, effort and strategy feedback ("You really pushed through that difficult part today" / "I noticed you adjusted your approach — that was smart") supports a sense of competence without creating dependence on praise for continued engagement. It names something the person did, rather than something they simply are or have become.
This approach is well-supported across educational psychology and organizational research. The specifics matter: generic enthusiasm ("Great job!") has little effect and can even backfire. Specific, process-focused feedback builds the internal architecture that sustains behavior over time.
Training With Logic, Not Instinct
NomX operates from a consistent philosophy: train with logic, not guts and feeling.
This applies to physical training — where we work through the science of load, recovery, and progressive overload rather than relying on effort alone. It applies equally to motivation.
Motivation is not something you either have or you don't. It is not a personality trait you're born with. It is a structure — one that can be built deliberately, maintained intentionally, and strengthened over time through the right inputs.
People who "seem naturally motivated" are usually running on internal fuel that was cultivated, often without conscious effort, through favorable conditions: activities they found genuinely interesting, environments where they experienced competence, relationships where they felt understood. The underlying principles were working, even without awareness.
Understanding those principles makes them reproducible — for yourself, and for the people you work with.
The goal in any long-term fitness or health context is not to find a more compelling external reward. It is to help someone discover that the work itself — the movement, the progress, the gradual expansion of what they can do — is its own reward. When that happens, consistency stops being a discipline problem and starts being an almost natural outcome.
Summary
Extrinsic motivation — driven by praise, rewards, or external pressure — works in the short term but collapses when the reward disappears. It is a valid starting point, not a sustainable engine.
Intrinsic motivation — driven by genuine interest, the satisfaction of growth, or the enjoyment of the process — sustains itself without external input. This is the target state for long-term consistency.
The undermining effect describes what happens when external rewards are added to already-intrinsically-motivated behavior: internal motivation decreases. Praise and rewards must be designed thoughtfully, focused on process rather than outcome, to avoid eroding the internal motivation that makes real change possible.
Self-Determination Theory identifies three needs that support intrinsic motivation: autonomy (the sense of choosing), competence (the experience of improvement), and relatedness (the feeling of being genuinely understood). Coaching environments that meet these needs produce clients who sustain their own motivation rather than depending on external reinforcement.
The difference between those who change and those who don't is usually not effort or talent. It is whether they found a fuel source that doesn't run out.
About NomX
NomX is a personal training and body design studio based in Kyoto, Japan. Our work is grounded in the science of movement, physiology, and behavioral health — not in gut feelings, trends, or generic advice.
The philosophy we bring to physical training — train with logic, not just instinct — extends to everything we share through the 5S Manabi series. Whether the topic is progressive overload, recovery science, or the psychology of motivation, the approach is the same: understand the mechanism, apply it deliberately, and let the results compound over time.
"10 years from now, a body that moves better than today." That is the goal at NomX. A long-term commitment to intelligent, evidence-based practice — in the gym and beyond.
YouTube: NomX at @nomx-jp — https://youtube.com/@nomx-jp
Website (sessions, consultation, programs): https://nomx69japan.github.io/
This note series extends the 5S Manabi YouTube shorts into longer-form reading, covering the reasoning and evidence behind each topic. Follow to build the full framework over time.
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#Motivation #Psychology #Counseling #SelfDetermination #Consistency #Fitness #BehaviorChange #NomX
