22 Exercise Science & Anatomy Practice Questions & Answers

1. 1. A client performs a barbell back squat. During the descent, the gluteus maximus and quadriceps are lengthening under tension to control the load. Which muscle action is occurring, and in which plane does the primary hip and knee motion take place?

   • A.Eccentric action in the sagittal plane✓ Answer
   • B.Concentric action in the sagittal plane
   • C.Eccentric action in the frontal plane
   • D.Isometric action in the transverse plane

   An eccentric action occurs when the force the muscle produces is less than the external resistance, so the muscle lengthens while still under tension in order to decelerate and absorb the load. Squat descent is hip and knee flexion, which occurs in the sagittal plane about the medial-lateral axis.

   Source: NASM CPT Exam Content Outline, Domain 1 (muscle action spectrum; planes of motion)Report a problem with this question

2. 2. A trainer has a client hold a foam roller on the tensor fascia latae for approximately 30 seconds at a tender point until the tissue releases. Which sensory receptor mediates this relaxation response?

   • A.The Pacinian corpuscle, which senses vibration and produces synergistic dominance
   • B.The muscle spindle, which senses length change and produces the stretch reflex
   • C.The joint receptor, which senses pressure and produces reciprocal inhibition
   • D.The Golgi tendon organ, which senses tension and produces autogenic inhibition✓ Answer

   The Golgi tendon organ lies at the musculotendinous junction and responds to sustained tension by inhibiting motor neuron activity to that same muscle, a mechanism called autogenic inhibition. This is why sustained pressure or a held static stretch reduces muscle tone, whereas fast or bouncing stretching instead excites the muscle spindle and triggers a protective contraction.

   Source: NASM CPT Exam Content Outline, Domain 1 (autogenic inhibition; mechanoreceptors)Report a problem with this question

3. 3. During an overhead squat assessment, a client's knees move inward. The trainer suspects the adductor complex is overactive and is abnormally decreasing neural drive to the gluteus medius. What is this phenomenon called?

   • A.Autogenic inhibition
   • B.Relative flexibility
   • C.Synergistic dominance
   • D.Altered reciprocal inhibition✓ Answer

   Reciprocal inhibition is the normal relaxation of an antagonist while an agonist contracts; when a chronically overactive muscle abnormally inhibits its functional antagonist, the state is called altered reciprocal inhibition. Synergistic dominance is the downstream consequence in which a synergist takes over for the now-inhibited muscle, so it describes a different step in the chain.

   Source: NASM CPT Exam Content Outline, Domain 1 (reciprocal inhibition, altered reciprocal inhibition, synergistic dominance)Report a problem with this question

4. 4. A track athlete performs a maximal-effort 10-second sprint from blocks. Which energy pathway supplies the majority of ATP for this effort?

   • A.The glycolytic system
   • B.The Krebs cycle operating alone
   • C.The ATP-PC (phosphagen) system✓ Answer
   • D.The oxidative system

   The ATP-PC system uses stored ATP and phosphocreatine to regenerate ATP without oxygen, giving the highest power output but the smallest capacity, so it dominates all-out efforts lasting roughly the first 10 to 15 seconds. All three systems run at the same time; only their relative contribution shifts with intensity and duration.

   Source: NASM CPT Exam Content Outline, Domain 1 (bioenergetics and exercise metabolism)Report a problem with this question

5. 5. A client's resting heart rate is 60 beats per minute and stroke volume is 70 mL per beat. What is the resting cardiac output, and what happens to it during submaximal exercise?

   • A.4.2 L/min; it increases because both heart rate and stroke volume rise✓ Answer
   • B.4.2 L/min; it stays constant because stroke volume falls as heart rate rises
   • C.130 L/min; it increases because heart rate rises
   • D.0.86 L/min; it decreases as blood is shunted to the muscles

   Cardiac output equals stroke volume multiplied by heart rate, so 70 mL x 60 beats/min = 4,200 mL/min, or 4.2 L/min. During exercise both variables increase to deliver more oxygenated blood to working muscle, so cardiac output rises substantially above resting values.

   Source: NASM CPT Exam Content Outline, Domain 1 (cardiorespiratory exercise physiology; Q = SV x HR)Report a problem with this question

6. 6. Which statement correctly describes blood flow through the pulmonary circuit?

   • A.The pulmonary artery carries deoxygenated blood to the lungs and the pulmonary veins return oxygenated blood to the left atrium✓ Answer
   • B.The pulmonary veins deliver deoxygenated blood directly to the left ventricle for gas exchange
   • C.Both the pulmonary artery and pulmonary veins carry oxygenated blood because they serve the lungs
   • D.The pulmonary artery carries oxygenated blood to the lungs and the pulmonary veins return deoxygenated blood to the right atrium

   Arteries are defined by carrying blood away from the heart and veins by returning blood to it, not by oxygen content, which makes the pulmonary circuit the classic exception. Blood leaves the right ventricle deoxygenated through the pulmonary artery, is oxygenated at the alveolar capillaries, and returns via the pulmonary veins to the left atrium.

   Source: NASM CPT Exam Content Outline, Domain 1 (cardiorespiratory system anatomy)Report a problem with this question

7. 7. A client performs a standing calf raise, rising onto the balls of the feet. Which lever class does this movement represent, and why?

   • A.Third class, because the fulcrum lies at the ankle joint
   • B.Third class, because the effort lies between the fulcrum and the resistance
   • C.Second class, because the resistance lies between the fulcrum and the effort✓ Answer
   • D.First class, because the fulcrum lies between the effort and the resistance

   In a standing calf raise the ball of the foot acts as the fulcrum, body weight acts through the ankle as the resistance in the middle, and the calf muscles pull on the calcaneus as the effort at the far end, which defines a second-class lever. Second-class levers are mechanically advantageous and rare in the human body, where most joints operate as third-class levers that favor speed and range of motion over force.

   Source: NASM CPT Exam Content Outline, Domain 1 (functional biomechanics: levers, force, torque)Report a problem with this question

8. 8. A client holds a dumbbell and slowly lowers it from a fully flexed elbow toward full extension. Why does the demand on the elbow flexors change as the forearm approaches horizontal with the elbow extended?

   • A.Torque decreases because the mass of the dumbbell effectively decreases at longer lengths
   • B.Torque is unchanged because the weight of the dumbbell never changes
   • C.Torque increases because the moment arm between the load and the elbow axis lengthens✓ Answer
   • D.Torque decreases because a longer lever always reduces muscular demand

   Torque equals force multiplied by the perpendicular distance from the axis of rotation, so lengthening the resistance arm increases the rotary demand even though the dumbbell's mass is constant. This is the biomechanical reason a load held farther from a joint feels heavier and why altering limb position changes exercise difficulty without changing the weight.

   Source: NASM CPT Exam Content Outline, Domain 1 (torque = force x moment arm)Report a problem with this question

9. 9. A client performs a side lunge and then a cable rotation. In which planes do these two exercises primarily occur?

   • A.Side lunge in the frontal plane; cable rotation in the transverse plane✓ Answer
   • B.Side lunge in the sagittal plane; cable rotation in the frontal plane
   • C.Side lunge in the transverse plane; cable rotation in the frontal plane
   • D.Both occur in the sagittal plane

   The frontal plane divides the body into front and back halves and contains abduction, adduction, and lateral flexion, which is why a side lunge belongs there. The transverse plane divides the body into top and bottom halves and contains internal and external rotation about the longitudinal axis, which is where a cable rotation occurs.

   Source: NASM CPT Exam Content Outline, Domain 1 (planes of motion and joint actions)Report a problem with this question

10. 10. A client's job requires standing all day, and testing shows high fatigue resistance in the soleus and transverse abdominis. Which fiber type predominates in these postural muscles, and what structural feature explains that endurance?

    • A.Type I fibers, which have more mitochondria, capillaries, and myoglobin✓ Answer
    • B.Type IIx fibers, which have the largest diameter and highest power output
    • C.Type IIa fibers, which rely primarily on the ATP-PC system
    • D.Type I fibers, which have fewer capillaries but a larger cross-sectional area

    Type I (slow-twitch) fibers are smaller in diameter and contain more mitochondria, capillaries, and myoglobin, which supports sustained aerobic ATP production and makes them fatigue resistant. Postural muscles such as the soleus and transverse abdominis are Type I dominant because they must maintain low-level tension for long periods.

    Source: NASM CPT Exam Content Outline, Domain 1 (muscular system structure and physiology; fiber types)Report a problem with this question

11. 11. In the sliding filament theory of muscle contraction, what is the direct role of calcium released from the sarcoplasmic reticulum?

    • A.It provides the chemical energy for the myosin power stroke, replacing ATP
    • B.It binds to myosin heads to detach them from actin at the end of a contraction
    • C.It binds to troponin, moving tropomyosin off the actin binding sites so myosin can form cross-bridges✓ Answer
    • D.It stimulates acetylcholine release at the neuromuscular junction

    Calcium binds troponin, which shifts tropomyosin away from the active sites on actin and permits myosin cross-bridge formation and the pulling of actin toward the sarcomere center. ATP, not calcium, both powers the stroke and is required to detach the myosin head so the muscle can relax.

    Source: NASM CPT Exam Content Outline, Domain 1 (muscle physiology; excitation-contraction coupling)Report a problem with this question

12. 12. A client stands on one leg and the opposite hip drops while the stance knee caves inward. Weakness in which subsystem best explains this frontal-plane instability?

    • A.The deep longitudinal subsystem: erector spinae, biceps femoris, and peroneus longus
    • B.The posterior oblique subsystem: gluteus maximus, contralateral latissimus dorsi, and thoracolumbar fascia
    • C.The anterior oblique subsystem: internal and external obliques and the adductor complex
    • D.The lateral subsystem: gluteus medius, tensor fascia latae, adductor complex, and contralateral quadratus lumborum✓ Answer

    The lateral subsystem provides frontal-plane pelvo-femoral stability during single-leg stance, so weakness there allows the pelvis to drop and the femur to adduct and internally rotate, producing knee valgus. Note that this subsystem includes the contralateral quadratus lumborum, a detail that distinguishes it from the sagittal-plane deep longitudinal and rotational oblique subsystems.

    Source: NASM CPT Exam Content Outline, Domain 1 (integrated muscle system and subsystems)Report a problem with this question

13. 13. Which muscles form the force-couple responsible for upward rotation of the scapula during an overhead press?

    • A.Levator scapulae, rhomboids, and teres major
    • B.Posterior deltoid, infraspinatus, and teres minor
    • C.Upper trapezius, lower trapezius, and serratus anterior✓ Answer
    • D.Latissimus dorsi, rhomboids, and pectoralis minor

    A force-couple is two or more muscles pulling in different directions to produce a single joint motion, and scapular upward rotation is the textbook example: the upper trapezius pulls up, the lower trapezius pulls down, and the serratus anterior pulls the scapula around the rib cage. If one member is weak or inhibited, the shoulder loses the upward rotation needed for full overhead motion.

    Source: NASM CPT Exam Content Outline, Domain 1 (force-couple relationships)Report a problem with this question

14. 14. During a standard push-up, which assignment of muscle roles is correct?

    • A.Triceps brachii is the agonist, pectoralis major is the antagonist, and the deltoid is a stabilizer
    • B.Anterior deltoid is the antagonist, pectoralis major is a stabilizer, and the triceps is the agonist
    • C.Latissimus dorsi is the agonist, pectoralis major is a synergist, and the biceps is a stabilizer
    • D.Pectoralis major is the agonist, triceps brachii is a synergist, and the rotator cuff acts as a stabilizer✓ Answer

    The agonist is the prime mover for a given action, synergists assist it, antagonists oppose it, and stabilizers support the joint so the movement can occur efficiently. In a push-up the pectoralis major drives horizontal shoulder adduction as the prime mover while the triceps and anterior deltoid assist and the rotator cuff and core stabilize.

    Source: NASM CPT Exam Content Outline, Domain 1 (muscle roles: agonist, antagonist, synergist, stabilizer)Report a problem with this question

15. 15. A client cannot fully extend the hip during a bridge, and the trainer observes the hamstrings and erector spinae doing most of the work while the gluteus maximus stays quiet. What is this compensation called?

    • A.Reciprocal inhibition
    • B.Autogenic inhibition
    • C.Arthrokinematic roll and glide
    • D.Synergistic dominance✓ Answer

    Synergistic dominance occurs when synergist muscles take over the job of a weak or inhibited prime mover, as when the hamstrings and erector spinae drive hip extension for an underactive gluteus maximus. Reciprocal inhibition describes the normal relaxation of an antagonist, and autogenic inhibition is the Golgi tendon organ relaxing the same muscle under tension, so neither names this compensation.

    Source: NASM CPT Exam Content Outline, Domain 1 (synergistic dominance)Report a problem with this question

16. 16. A coach shortens the time between the landing and the takeoff of a client's box jumps. Which physiological principle explains why this improves power output?

    • A.Autogenic inhibition: rapid loading increases Golgi tendon organ output and relaxes the muscle
    • B.The stretch-shortening cycle: a shorter amortization phase preserves stored elastic energy and spindle activation✓ Answer
    • C.The all-or-nothing principle: faster movements recruit only half of each motor unit
    • D.The length-tension relationship: a shorter ground contact lengthens the muscle to its optimal resting length

    The stretch-shortening cycle consists of a rapid loaded eccentric phase that stores elastic energy and stimulates the muscle spindle, a brief amortization (transition) phase, and a powerful concentric phase. Because stored elastic energy dissipates quickly, shortening the amortization phase preserves more of it and increases the resulting power output.

    Source: NASM CPT Exam Content Outline, Domain 1 (stretch-shortening cycle)Report a problem with this question

17. 17. Which statement correctly describes the force-velocity relationship during concentric muscle action?

    • A.As the velocity of shortening increases, the force the muscle can produce also increases
    • B.Force output is independent of velocity because motor unit size is fixed
    • C.As the velocity of shortening increases, the force the muscle can produce decreases✓ Answer
    • D.Force output peaks at maximal shortening velocity because more cross-bridges form

    During concentric action force and velocity have an inverse relationship, because at high shortening speeds there is less time for myosin cross-bridges to attach and generate tension. This is why a maximal load can only be moved slowly, and it contrasts with eccentric action, where force capability is maintained or even rises as velocity increases.

    Source: NASM CPT Exam Content Outline, Domain 1 (force-velocity relationship)Report a problem with this question

18. 18. A trainer explains that a chronically shortened hip flexor complex produces less force than it would at its normal resting length. Which principle does this illustrate?

    • A.Davis's law, since soft tissue always gains strength along lines of stress
    • B.The principle of specificity, since the muscle adapts to the imposed demand
    • C.The all-or-nothing principle, since shortened fibers fire only partially
    • D.The length-tension relationship, since maximal force requires optimal actin-myosin overlap✓ Answer

    The length-tension relationship describes how the tension a muscle can generate depends on its resting length, with peak force occurring at the length that allows the greatest number of actin-myosin cross-bridges to form. A muscle held chronically short or long by postural imbalance sits away from that optimum and generates less force, which is the mechanism linking posture to observed movement compensations.

    Source: NASM CPT Exam Content Outline, Domain 1 (length-tension relationship)Report a problem with this question

19. 19. Which group of muscles makes up the local (stabilization) system of the core, and what is its defining function?

    • A.Gluteus maximus, contralateral latissimus dorsi, and thoracolumbar fascia; they generate rotational power
    • B.Rectus abdominis, external obliques, erector spinae, and latissimus dorsi; they generate gross trunk motion
    • C.Hip flexors, hamstrings, quadriceps, and adductors; they transfer force between the extremities
    • D.Transverse abdominis, internal obliques, multifidus, diaphragm, and pelvic floor; they attach to the spine and fire in anticipation of limb movement✓ Answer

    The local stabilization system attaches directly to the vertebrae and provides segmental, intervertebral stability rather than producing large ranges of motion, and it activates in anticipation of limb movement to stiffen the spine before load arrives. The global movement system, made of larger muscles crossing multiple joints, produces and transfers force between the upper and lower extremities.

    Source: NASM CPT Exam Content Outline, Domain 1 (core local and global systems)Report a problem with this question

20. 20. A client sleeps four to five hours per night and reports poor recovery despite consistent training. Which hormonal pattern best explains the impaired recovery?

    • A.Elevated glucagon from the adrenal medulla, which suppresses testosterone directly
    • B.Elevated insulin from the pancreatic alpha cells, which blocks tissue repair
    • C.Reduced growth hormone release during deep sleep alongside chronically elevated cortisol, a catabolic combination✓ Answer
    • D.Reduced cortisol and elevated growth hormone, which together accelerate protein breakdown

    Growth hormone is anabolic and is released in its largest amounts during deep sleep, so short sleep reduces the tissue-repair signal, while insufficient sleep and unrelieved stress keep the catabolic hormone cortisol elevated and promote protein breakdown. The other options misstate the source or the direction of each hormone: insulin comes from beta cells, glucagon from pancreatic alpha cells, and low cortisol with high growth hormone would favor recovery rather than impair it.

    Source: NASM CPT Exam Content Outline, Domain 1 (endocrine system responses to exercise)Report a problem with this question

21. 21. After eight weeks of resistance training, a previously untrained client is noticeably stronger but shows little change in muscle size. What best explains this?

    • A.Early strength gains are largely neural, from improved motor unit recruitment, rate coding, and synchronization✓ Answer
    • B.Muscle fibers converted from Type I to Type IIx, which raises force without changing size
    • C.Hypertrophy always precedes neural adaptation, so the client must have measured incorrectly
    • D.Strength gains at this stage come entirely from increased bone mineral density

    In the initial weeks of resistance training the nervous system adapts first: more motor units are recruited, they fire at higher rates and more synchronously, and neural inhibition decreases, all of which raise force output before measurable myofibrillar hypertrophy occurs. Structural growth in muscle and connective tissue follows with continued progressive overload.

    Source: NASM CPT Exam Content Outline, Domain 1 (chronic neuromuscular adaptations; overload, specificity)Report a problem with this question

22. 22. After a set of squats a trainer tells a client, "Your left knee drifted inward on the last three reps." What type of feedback is this?

    • A.Internal feedback from the client's proprioceptors
    • B.Sensorimotor integration rather than feedback
    • C.External feedback in the form of knowledge of performance✓ Answer
    • D.External feedback in the form of knowledge of results

    External (augmented) feedback is information supplied by the trainer or a device, and it divides into knowledge of results, which reports the outcome such as repetitions completed, and knowledge of performance, which describes the quality of the movement itself. A comment about the knee's path during the reps addresses movement quality, so it is knowledge of performance.

    Source: NASM CPT Exam Content Outline, Domain 1 (motor learning; knowledge of results vs knowledge of performance)Report a problem with this question

Practice questions written to the published exam content outline for the NASM Certified Personal Trainer credential and to the standard exercise-science material common to accredited personal-training certifications. NASM and OPT are marks of the National Academy of Sports Medicine; this site is not affiliated with or endorsed by NASM, ACE, ISSA, or NSCA. Exam content outlines are revised periodically — confirm current requirements with your certifying body before testing. Nothing here is medical advice; a personal trainer does not diagnose, treat, or prescribe. About the CPT certification →