Why One Word Creates So Much Confusion

Few words in English do as much double duty as energy. A physicist uses it to describe the capacity of a system to do work — something that can be calculated, measured in joules, and tracked through every transformation it undergoes. A wellness influencer uses it to describe a vague internal vitality. A motivational speaker uses it to describe the mood in a room. None of those last two uses are wrong as figures of speech, but the problem starts when readers carry the fuzzy, everyday meaning into scientific contexts — or when bad-faith communicators deliberately blur the line.

This linguistic overlap is genuinely one of the most productive entry points for misinformation. Once you understand exactly where the two meanings diverge, a lot of confusing claims start to resolve themselves. Recognizing how real physics works is one of the best defenses against bad science online.

The Mistakes — and How to Avoid Them

These are the most common ways the word 'energy' gets misread, misapplied, or deliberately misused — and what the physics actually says.

1

Treating 'energy' as a vague, unmeasurable life force or spiritual substance.

Why it happens: Wellness culture, spiritual traditions, and everyday speech all use 'energy' to describe moods, vitality, or intangible forces — and the word sounds scientific enough to lend those ideas credibility.

How to avoid: In physics, energy is always measurable and has specific units (joules). If a claim about energy can't specify what type — kinetic, thermal, electromagnetic, chemical — and can't in principle be measured, it isn't using the term in any physical sense. Recognize it as metaphor rather than mechanism.
2

Assuming 'energy cannot be destroyed' means spiritual or emotional energy persists after death.

Why it happens: The law of conservation of energy is real and well-established, but people sometimes extend it beyond its domain, using it to support metaphysical beliefs about consciousness or souls persisting because 'energy can't be destroyed.'

How to avoid: Conservation of energy applies to closed physical systems and specific, defined quantities. It says nothing about consciousness or subjective experience. The thermal energy your body releases after death disperses into the environment — which is perfectly described by thermodynamics, not metaphysics.
3

Conflating personal 'energy levels' with the physics concept of energy in the body.

Why it happens: When someone says they have 'low energy,' they mean fatigue or motivation. When a biologist or physician discusses energy, they mean ATP availability and metabolic rate — related but far more specific concepts.

How to avoid: Your body does use energy in the strict physical sense — chemical potential energy stored in food is converted through metabolism. But subjective feelings of fatigue involve neuroscience, psychology, and biochemistry together. Don't assume a product that claims to 'restore your energy' is addressing any of those measurable systems unless it explains exactly how.
4

Thinking 'high-energy' and 'low-energy' always map to fast and slow, or powerful and weak.

Why it happens: Everyday speech uses 'high energy' to mean lively or intense. In physics, high energy can describe a gamma ray photon that is invisibly small, or a slow-moving but very massive object.

How to avoid: In physics, kinetic energy depends on both mass and velocity; a freight train moving slowly can have far more kinetic energy than a baseball thrown at full speed. High-energy radiation like X-rays and gamma rays are high-energy precisely because of their frequency, not because they are large or fast in an everyday sense. Everyday physics is full of these counterintuitive examples.
5

Believing 'negative energy' in physics validates the idea of negative emotional or spiritual energy.

Why it happens: Physics does use the term 'negative energy' — in quantum field theory and in gravitational potential energy calculations. Wellness and self-help content sometimes borrows this language to sound grounded in science.

How to avoid: Negative energy in physics is a mathematical convention or a specific quantum phenomenon — it doesn't mean an invisible harmful force emanating from people or places. When you hear 'negative energy' used to describe a person or environment, that is purely a social metaphor with no connection to the physics definition.

Why This Matters Beyond the Classroom

Getting the physics definition of energy right isn't pedantry — it has real consequences for how you evaluate claims you encounter every day. When a product promises to "boost your energy" through a crystal or a special frequency, there's no physical mechanism being offered, because the colloquial energy being invoked isn't a quantity that devices or crystals interact with. When someone describes a therapy as "balancing your body's energy fields," that statement borrows the credibility of physics while meaning something entirely different from what physicists study.

~30%

Adults who believe in pseudoscientific 'energy healing'

A 2017 survey by the National Center for Health Statistics found roughly 3 in 10 American adults had used a complementary health approach that commonly invokes non-physical 'energy' concepts.

4.184 J

One calorie of physical energy (precisely defined)

The 'calorie' in food labeling is actually a kilocalorie — 4,184 joules — illustrating that biological energy is a real, measurable physical quantity, not a metaphor.

In contrast, the biological use of energy — the kind your muscles actually use — is grounded in measurable biochemistry. ATP synthesis, caloric intake, metabolic rate: these are genuine energy transformations that obey the same conservation laws as any other physical system. See our explainer on aerobic and anaerobic energy for how your body's real energy systems work during exercise.

Similarly, the physics concept of power — energy transferred per unit of time — is frequently confused with strength or speed in everyday conversation. Speed, power, and strength are not the same thing, and mixing them up leads to mistaken conclusions about athletic training and performance.

The clearest protection against energy-language confusion is simple: whenever you see the word used in a scientific-sounding argument, ask what units it's measured in, what instrument could detect it, and what happens when it changes. If no answer is available, the claim isn't using energy in any physical sense — and that's worth knowing.