NASM CES key terms

The interconnected system of joints, muscles, fascia, and nerves through which force travels in the body; a restriction at one link alters motion and loading at other links.

The motion that occurs between joint surfaces, such as rolling, gliding, and spinning; reduced joint play here can limit the range of motion available at the joint.

The gross movement of bones at a joint in the cardinal planes, described as flexion, extension, abduction, and similar actions that a client can see and feel.

The principle that a muscle produces the most force at its resting length and less when over-shortened or over-lengthened, which affects how it behaves under load.

The cooperative action of muscles pulling from different directions on the same bone to produce one coordinated movement; disrupted timing among them changes joint motion.

A condition in which a synergist muscle takes over the function of a weak or inhibited prime mover, often becoming overactive and reinforcing a faulty movement pattern.

The normal reflex in which contraction of one muscle reduces neural drive to its antagonist, allowing smooth joint motion; it becomes problematic when the reflex stays chronically upregulated.

A lasting decrease in neural drive to a muscle caused by chronic overactivity of its antagonist, leaving the weakened muscle unable to contribute normally to movement.

A reflex decrease in muscle tension following a strong contraction or sustained stretch of the same muscle; self-myofascial release and contract-relax stretching rely on it.

The principle that soft tissue such as muscle and fascia remodels along the lines of stress placed on it, so habitual postures gradually change tissue structure and length.

Continuous connective tissue that wraps and links muscles, bones, and organs, transmitting force and supplying proprioceptive feedback throughout the body.

The ability of the nervous system to recruit the right muscles at the right time with the right amount of force, producing coordinated, efficient movement.

The body's sense of joint position and movement, gathered from receptors in muscles, tendons, and joints, which guides balance and coordinated motion.

A postural pattern of tight hip flexors and low-back extensors paired with weak gluteals and abdominals, typically producing an anterior pelvic tilt and increased lumbar lordosis.

A pattern of tight upper trapezius, levator scapulae, and pectorals with weak deep cervical flexors and lower and middle trapezius, often producing forward head and rounded shoulders.

A postural pattern marked by flattened arches, knee valgus, and internal rotation of the hips, usually with tight calves, adductors, and hip flexors and weak foot and gluteal muscles.

A predictable set of alignment and muscle-balance compensations that develops in response to injury, repetitive activity, or habitual posture, and that alters how a client moves.

Visual inspection of a client standing still, viewed from the front, side, and back, to identify alignment deviations such as forward head, rounded shoulders, and pelvic tilt.

A transitional screening test in which the client squats with the arms overhead, revealing dynamic compensations at the feet, knees, hips, and shoulders under load.

A screening test performed on one leg that exposes hip stability, knee tracking, and frontal-plane control problems that a two-legged squat may hide.

An inward collapse of the knee in which it drifts toward or past the midline of the foot during squatting or landing, often linked to hip weakness and foot overpronation.

A hands-on procedure in which the examiner applies resistance to a specific muscle action to grade strength and estimate whether a muscle is weak or inhibited.

Measurement of how far a joint moves, actively or passively, used to separate a tight muscle or joint restriction from weakness or a motor-control problem.

A weight-bearing lunge test in which the client drives the knee forward over the toes to measure available ankle dorsiflexion needed for squatting and gait.

Any deviation from ideal movement that the body uses to complete a task when a joint lacks mobility, stability, or strength, shifting stress to other structures.

The four-step sequence of inhibit, lengthen, activate, and integrate that takes a client from reducing overactivity to reinforcing an efficient movement pattern.

A self-applied technique using a foam roller or similar tool to apply sustained pressure to overactive tissue, lowering tone through autogenic inhibition and improving tissue tolerance.

Holding a muscle in a lengthened position for a sustained period to increase tissue tolerance and restore normal resting length after inhibitory work.

A contract-relax technique in which the client contracts the target muscle against resistance before stretching further, using autogenic inhibition to gain length.

Low-load, controlled activation of one specific weak or inhibited muscle, often in a single plane, to restore its ability to contribute to a movement pattern.

The final corrective step, in which the client performs a whole-body movement that combines newly activated muscles with mobility gains under functional demand.

The combination of joint range, soft tissue extensibility, and motor control that lets a client move through a full range without compensations.

A hyperirritable spot within a taut band of muscle or fascia that is tender to pressure and can refer sensation and alter movement patterns.

The training parameters chosen for a session, including sets, repetitions, load, tempo, rest, and frequency, adjusted to match the client's goals and tolerance.

The speed at which a repetition is performed, expressed as seconds for the eccentric, isometric, and concentric phases; slower tempos build control in corrective work.

The systematic increase in exercise difficulty through range of motion, load, speed, base of support, or complexity as the client masters the current level.

Repeated screening and testing at planned intervals to confirm that corrective strategies have changed movement quality and to guide adjustments to the program.