FRC Core Concepts and Principles Practice Questions — Questions and Answers

Question 1: Before PAILs/RAILs, FRC typically recommends what initial step?

A maximal plyometric jump
Foam rolling only the antagonist
Ten minutes of cycling at high intensity
A passive stretch hold of around two minutes in the target position (Correct answer)

Correct answer: A passive stretch hold of around two minutes in the target position

A sustained passive stretch of about two minutes precedes the isometric loading phases.

Question 2: What is an end-range 'lift-off' in FRC?

Actively lifting a limb from a passively achieved end-range position with no support (Correct answer)
Lifting a heavy barbell off the floor
A passive stretch using a strap
A jumping drill for elasticity

Correct answer: Actively lifting a limb from a passively achieved end-range position with no support

Lift-offs train active control in range previously only accessible passively.

Question 3: How does a 'hover' differ from a lift-off in FRC programming?

A hover holds the lifted position isometrically for time (Correct answer)
A hover involves ballistic bouncing
A hover uses external load only
A hover is performed passively

Correct answer: A hover holds the lifted position isometrically for time

Hovers sustain the lifted end-range position, extending time under tension.

Question 4: Why does FRC place emphasis on rotational capacity of joints like the hip and shoulder?

Rotation training replaces the need for strength work
Rotation is a key articular function often lost first and essential for joint health (Correct answer)
Rotation is unimportant compared with sagittal motion
Only the spine is capable of rotation

Correct answer: Rotation is a key articular function often lost first and essential for joint health

Rotational range is critical for ball-and-socket joints and frequently restricted.

Question 5: Compared with muscle, how does connective tissue such as tendon and capsule generally adapt to training?

Only through passive stretching
More slowly, requiring consistent long-term loading (Correct answer)
It does not adapt at all
Much faster, within a single session

Correct answer: More slowly, requiring consistent long-term loading

Connective tissues have lower metabolic activity and adapt more slowly than muscle.

Question 6: The FRC idea that cells sense mechanical load and respond by remodeling tissue is called:

Glycolysis
Proprioceptive neuromuscular facilitation
Reciprocal inhibition
Mechanotransduction (Correct answer)

Correct answer: Mechanotransduction

Mechanotransduction is the conversion of mechanical stress into cellular adaptation signals.

Question 7: Which FRC concept describes deliberately generating whole-body tension to stabilize while training a target joint?

Irradiation (Correct answer)
Stretch reflex
Reciprocal innervation
Relaxed breathing

Correct answer: Irradiation

Irradiation is spreading tension through the body to enhance stability and force.

Question 8: In the FRC system, what distinguishes mobility from flexibility?

Mobility refers only to spinal motion; flexibility refers to limb motion
Mobility is passive range; flexibility is active range
Mobility is the range you can actively control; flexibility is the passive range available (Correct answer)
They are interchangeable terms describing joint range

Correct answer: Mobility is the range you can actively control; flexibility is the passive range available

FRC defines mobility as actively controlled range, whereas flexibility is range achievable passively.

Question 9: A client can passively reach 120 degrees of hip flexion but can actively lift to only 90 degrees. What does FRC call this difference?

Joint hypermobility
Capsular end feel
Neural tension deficit
The passive-active gap that indicates range lacking control (Correct answer)

Correct answer: The passive-active gap that indicates range lacking control

The difference between passive and active range represents range the nervous system cannot yet control.

Question 10: Why does FRC emphasize converting passive range into active range?

Passive range is always harmful and should be reduced
Range that cannot be controlled represents a potential injury risk (Correct answer)
It eliminates the need for strength training
Active range improves cardiovascular fitness

Correct answer: Range that cannot be controlled represents a potential injury risk

Uncontrolled range is where tissues are exposed to loads they cannot manage, raising injury risk.

Question 11: Which principle underlies FRC's view that tissues change only in response to specific demands?

The all-or-none principle
Autogenic inhibition
Specific Adaptation to Imposed Demands (SAID) (Correct answer)
Reciprocal inhibition

Correct answer: Specific Adaptation to Imposed Demands (SAID)

The SAID principle states the body adapts specifically to the type of stress placed upon it.

Question 12: From an FRC perspective, an injury most fundamentally occurs when:

Posture deviates from an ideal alignment
The load placed on a tissue exceeds that tissue's capacity (Correct answer)
A muscle is stretched beyond its resting length
Joint range exceeds population norms

Correct answer: The load placed on a tissue exceeds that tissue's capacity

FRC frames injury as an imbalance where imposed load surpasses tissue capacity.

Question 13: In FRC, why is the joint capsule given particular attention?

The capsule cannot adapt and should be ignored
The capsule only matters in the spine
Capsular restrictions limit articular motion and must be addressed for joint health (Correct answer)
The capsule is the primary force-producing tissue

Correct answer: Capsular restrictions limit articular motion and must be addressed for joint health

FRC views the capsule as a key tissue whose restrictions limit joint rotational capacity.

Question 14: Which statement best captures the FRC approach to training?

Maximize passive stretching before any loading
Avoid end ranges entirely to prevent injury
Focus solely on aerobic conditioning
Train the joint's health and control, not just the muscles that move it (Correct answer)

Correct answer: Train the joint's health and control, not just the muscles that move it

FRC prioritizes articular health and control of range as the foundation for performance.

Question 15: What is the primary purpose of daily Controlled Articular Rotations (CARs)?

To elevate heart rate before activity
To maintain joint health by moving each joint through its full available controlled range (Correct answer)
To passively stretch tight muscles
To build maximal hypertrophy

Correct answer: To maintain joint health by moving each joint through its full available controlled range

CARs are active, slow rotations at the outer limits of range to maintain and assess joint function.

Question 16: During CARs, what should happen to the rest of the body while the target joint moves?

It should stay completely relaxed
It should move along to increase range
It should be braced with tension to isolate motion at the target joint (Correct answer)
It should be stretched passively

Correct answer: It should be braced with tension to isolate motion at the target joint

Irradiating tension through the body prevents compensation and isolates the working joint.

Question 17: What does the acronym PAILs stand for?

Passive Active Integrated Loading
Progressive Active Isotonic Lifts
Proprioceptive Articular Isometric Lengthening
Progressive Angular Isometric Loading (Correct answer)

Correct answer: Progressive Angular Isometric Loading

PAILs stands for Progressive Angular Isometric Loading.

Question 18: In a PAILs/RAILs sequence, which tissue is contracted during the RAILs phase?

Only antagonist muscles of a different joint
Muscles on the shortened side, attempting to move deeper into the range (Correct answer)
Muscles on the lengthened side, pushing out of the stretch
No muscles; it is a passive hold

Correct answer: Muscles on the shortened side, attempting to move deeper into the range

RAILs contract the shortened tissues to actively pull further into the end range.

Question 19: Why are isometric contractions used at end range in FRC?

They relax the joint capsule permanently in one session
They are the only way to build cardiovascular endurance
They eliminate the need for warm-up
They signal the nervous system to accept and control new range (Correct answer)

Correct answer: They signal the nervous system to accept and control new range

End-range isometrics build strength and neurological control in positions the body otherwise protects.

Question 20: A client cramps while attempting an active end-range CAR. In FRC terms, what does this most likely indicate?

A need to switch exclusively to passive stretching
Ideal recruitment of the target muscles
Lack of strength and control in that portion of the range (Correct answer)
Excessive flexibility that must be reduced

Correct answer: Lack of strength and control in that portion of the range

Cramping often reflects the nervous system's inability to produce force efficiently at that range.

Question 21: Which best describes the intensity progression typically used in PAILs?

Contract at maximal effort instantly
Alternate rapidly between contraction and relaxation
Gradually ramp up contraction intensity rather than contracting maximally immediately (Correct answer)
Keep contraction at 5% throughout

Correct answer: Gradually ramp up contraction intensity rather than contracting maximally immediately

A gradual ramp in tension allows safe loading of tissues at end range.

FRC Core Concepts and Principles Practice Questions

Before PAILs/RAILs, FRC typically recommends what initial step?

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