NFPT CPT key terms

The reference stance used to describe all body movements: standing upright, eyes forward, arms at the sides with palms facing forward, and feet flat and slightly apart.

A vertical plane that splits the body into left and right halves and permits flexion and extension, as seen in a squat or a biceps curl.

The muscle chiefly responsible for producing a given joint action, such as the gluteus maximus during hip extension in a squat. It is the primary target when selecting exercises.

The muscle positioned on the opposite side of a joint from the prime mover. It lengthens under control during the movement and helps limit speed, as the triceps does during a curl.

A contraction in which the muscle changes length while moving a load, split into shortening (concentric) and lengthening (eccentric) phases.

A contraction in which the muscle builds tension without changing length, so no joint movement occurs, for example holding a plank or pushing against a wall.

The smallest contracting unit within a muscle fiber, spanning from one Z-line to the next. Actin and myosin filaments inside it slide together to shorten the fiber.

Categories of muscle fibers distinguished by contraction speed and fatigue resistance. Slow-twitch fibers sustain long efforts, while fast-twitch fibers generate rapid, powerful force but fatigue quickly.

A single motor neuron together with every muscle fiber it innervates. The nervous system raises force by activating more of these units or by firing them more rapidly.

A stretch-sensitive sensor inside muscle that detects how far and how fast a muscle lengthens, triggering a reflex contraction that resists the stretch.

A sensor located where muscle meets tendon that monitors tension. When tension climbs dangerously high it prompts the muscle to relax, lowering injury risk.

The volume of blood the left ventricle ejects with each beat, roughly 70 mL at rest and considerably more during exercise. Endurance training increases it, which lowers resting heart rate.

The amount of blood the heart pumps per minute, calculated as stroke volume multiplied by heart rate. It climbs during exercise to supply working muscle with more oxygen.

The highest rate at which the body can take in and use oxygen during maximal effort, usually expressed in milliliters per kilogram per minute. It is the standard measure of aerobic fitness.

The exercise intensity at which lactate builds up in the blood faster than it is cleared, marking a growing reliance on anaerobic metabolism. Training near it raises the pace a client can hold.

The immediate energy pathway, using stored creatine phosphate to rebuild ATP for about the first ten seconds of all-out effort, such as a maximal lift or a short sprint.

The breakdown of glucose or glycogen into pyruvate, producing a small amount of ATP without oxygen. It fuels hard efforts lasting roughly ten seconds to two minutes.

The oxygen-dependent pathway that breaks down carbohydrate and fat inside mitochondria, yielding large amounts of ATP at a slower rate. It dominates at rest and during longer, steady activity.

A planning framework built on four variables: Frequency, Intensity, Time, and Type. Adjusting any one of them changes the training stimulus and the resulting adaptation.

Gradually increasing training demand through load, volume, or complexity so the body keeps adapting. Without it, gains stall once the body has accommodated the current stimulus.

The principle that the body adapts to the precise demand placed on it, so training must resemble the goal. A cyclist gains little from bench pressing alone.

Organizing training into planned phases that shift volume and intensity over weeks or months, aiming to peak at the right time and reduce overtraining risk.

The heaviest load a client can lift for a stated number of repetitions with sound technique, so a 10RM is the most weight manageable for exactly ten reps.

A brief pre-participation screening questionnaire that flags symptoms, conditions, or risk factors requiring medical clearance before a client starts an exercise program.

The difference between resting and maximal heart rate. The Karvonen method multiplies this reserve by a target percentage and adds resting heart rate to set a training zone.

A subjective scale, commonly 6 to 20 or 0 to 10, describing how hard exercise feels. It is useful when heart rate is unavailable or unreliable, such as during some medications.

A weight-to-height ratio used to sort people into broad weight categories. It cannot distinguish muscle from fat, so it can mislabel lean, muscular clients.

A field technique that estimates body fat percentage by pinching subcutaneous fat at defined sites with calipers and entering the readings into a prediction equation.

The energy expended at complete rest to sustain basic functions such as breathing, circulation, and cell repair. It accounts for the largest portion of most people's daily calorie use.

Carbohydrate, protein, and fat, the nutrients that supply energy and raw material for repair. Their balance influences performance, recovery, and body composition.

A chronic condition in which the body handles blood glucose poorly. Trainers should coordinate with the client's medical team, watch for low blood sugar signs, and keep fast-acting carbohydrate available.

Persistently elevated blood pressure. Clients with uncontrolled readings need medical clearance, and training should avoid heavy straining and breath holding that spike pressure further.

A condition of reduced bone density that raises fracture risk. Programming favors weight-bearing and resistance work while avoiding loaded spinal flexion and situations with high fall risk.

Muscle tenderness that peaks a day or two after unfamiliar or intense exercise, especially eccentric work. It is not an injury and typically fades within a few days.

Damage to a ligament, the tissue joining bone to bone, caused by a sudden stretch or tear. It is usually managed at first with relative rest, ice, compression, and elevation.

Damage to a muscle or tendon from overstretching or a forceful contraction. Typical signs are localized pain, tightness, swelling, and weakness with use.

A first-aid routine of Rest, Ice, Compression, and Elevation applied soon after a soft-tissue injury to limit swelling and ease pain.

The legal and ethical limits of what a certified trainer may do: design and supervise exercise, but not diagnose injuries, prescribe diets, or provide treatment.

A client's voluntary agreement to take part after understanding the program's risks, benefits, and alternatives, documented in writing before training begins.

Failure to give the care a reasonable professional would provide in similar circumstances, causing harm. Establishing it requires duty, breach, causation, and damages.