If you’ve ever set a fitness goal — a New Year’s resolution or otherwise — only to crash and burn a few weeks in, this one’s for you.
By the end of this, you’ll have a 100,000-foot systems view of what it actually takes to force your body to change, how your own psychology gets in the way of that, and a four-step process for picking interventions that you’ll actually stick to. Not the ones that look best on paper. The ones that survive contact with your actual life. You can read the article below, or watch the video.
Why Willpower Isn’t the Real Problem
Human beings are both homeostatic and hedonic creatures. We do things because we need them to survive — eat, sleep, drink — and we do things because they feel good. Sometimes those hedonic impulses override the homeostatic ones entirely, and we do things that aren’t good for us anyway, because we enjoy them. Alcohol is the obvious example: it’s a literal poison, and a huge number of us consume it regularly because of how it makes us feel.
Homeostasis itself can be thought of as an equilibrium state, bounded on either end, that contains your current physical abilities. To change anything about your body, you have to disrupt that equilibrium — and disrupting it requires a stimulus strong enough to knock you out of those bands.
That’s why a marathoner walking the dog around the block won’t get any fitter, and someone who lifts kids and groceries all day won’t gain anything from five-pound dumbbells. The stimulus has to exceed what your body is already adapted to, or nothing changes.
Your Body Doesn’t Know the Difference Between a Deadlift and a Deadline
Here’s the part most people miss: physical training is a form of stress. It’s deliberately applied, but your body doesn’t file it separately from psychological stress — a hard workout and a brutal week at work register through the same system.
That matters because it means your capacity for stress is a shared, finite resource. Pile enough physical and psychological stress on top of each other, and you’ll hit a breaking point regardless of which one pushed you over.
How Adaptation Actually Happens: The Supercompensation Curve
Apply a stimulus, and your body drops into a fatigue state before bouncing back stronger — that’s positive adaptation. The trick is what happens next: there’s a critical window where, if you apply the next stimulus, your baseline rises and the whole curve trends upward over time. Miss that window and drift too long, and you simply return to baseline — no net progress, stimulus wasted.
This is the actual mechanism behind the advice you’ve heard a thousand times: consistency matters more than intensity. You need repeated, well-timed stimulus to get long-term change — not one heroic effort. That’s the key to achieving your fitness goals.
This also explains why so many comeback attempts and fitness goals fail. Someone falls off track, feels guilty, and tries to make up for lost time with one massive, all-out session. That single bout drives them so far into the fatigue state that it takes days to recover, with no positive adaptation to show for it. Same mistake, different direction: too little stimulus does nothing; too much stimulus at once digs a hole.
When You Push Too Hard: General Adaptation Syndrome and Burnout
Because your body treats physical and psychological stress through the same channel, it responds to sustained overload the same way regardless of source, moving through the classic three phases: alarm (the initial stress response), resistance (the body adapts and builds tolerance), and — if the stress keeps recurring without enough recovery — exhaustion. Exhaustion shows up as physical and mental burnout, depression, or injury.
That’s the conundrum at the center of any real behavior-change effort: you need a stressor taxing enough to force physiological change, but that same stressor is also psychologically taxing. Push too hard on both fronts at once, and you’re not building fitness — you’re building toward burnout. That’s a surefire way to fail in achieving your fitness goals.
The Leverage Framework: A 4-Step System for Choosing What Actually Sticks
This is where leverage comes in — a simple way to balance “impactful enough to matter” against “sustainable enough to actually do.” This is how we set you up to achieve your fitness goal.
- Set a goal. Heart health, body composition, whatever matters to you — pick one.
- List every intervention that could plausibly move you toward that goal.
- Score each intervention twice, on a scale of 1–10: a physiological score (how impactful is this, biologically?) and a psychological score (how tolerable is this for your actual life, and how likely are you to stick with it?). Multiply the two scores together for a number out of 100.
- Rank and choose. The intervention with the highest combined score is the one most likely to actually move the needle and stay in your life long enough to matter.
A Worked Example: Improving Body Composition
Say the fitness goal is better body composition. Three strong candidate interventions, each scored physiologically first:
- Adequate protein intake (at least 0.7 grams per pound of bodyweight) — physiological score: 10
- Resistance training, two-plus sessions per week — physiological score: 10
- Sleep, eight-plus hours per night — physiological score: 9
Now comes the part most people skip: brutal self-awareness about the psychological score.
Protein is something most people can realistically adhere to — there are countless easy ways to work more of it into a normal diet. Psychological score: 10. Combined: 100.
Resistance training is harder to guarantee for a busy person who travels often and can’t commit to two sessions every single week. Psychological score: 6. Combined: 60.
Sleep is enormously impactful, but if you’ve got a toddler with night terrors and you’re up at 4 a.m. most days, “eight-plus hours” isn’t a realistic target right now, no matter how much you want it to be. Psychological score: 2. Combined: 18.
Highest score wins: protein. Not because it’s the most powerful lever in isolation — resistance training scored just as high physiologically — but because it’s the one most likely to actually happen. Run it for a few weeks. If it sticks, it becomes a habit, and then you layer in the next-highest scoring intervention. If it doesn’t stick, you go back and re-score honestly, because your psychological numbers were probably wrong.
Why This Beats “Just Try Harder”
Most fitness and wellness efforts fail not because people lack discipline, but because they choose interventions that are impactful on paper and miserable in practice — and then blame themselves when the plan collapses under real life. This framework flips that: it treats your own psychology as data, not a character flaw, and builds your plan around the honest answer instead of the aspirational one.
It’s also iterative by design. You’re not locking in a single decision forever — you’re testing, reassessing, and re-scoring as your life and your tolerance change. That’s a very different posture than “white-knuckle it until it works.”
Fitness Goals: The Bottom Line
Change requires a stimulus strong enough to disrupt homeostasis — but stack too much physical and psychological stress at once, and you’ll burn out before you adapt. The fix isn’t more willpower. It’s picking the intervention with the best combination of biological impact and real-world tolerability, running it consistently, and reassessing honestly along the way. Set your goal, list your options, score them both ways, and go with whatever number comes out on top — even if it isn’t the “hardest” choice on the list.
If you want help building out your own scored list — or just want a coach in your corner while you run the experiment — reach out to Coach Erik at Viking Athletics in West Hartford, CT.