22 Exercise Science & Anatomy Practice Questions & Answers

1. 1. A client takes three seconds to lower from the top of a back squat to the point where the thighs are parallel to the floor. During that descent, what is the gluteus maximus doing?

   • A.Eccentrically decelerating hip flexion as it lengthens under tension✓ Answer
   • B.Isometrically stabilizing the pelvis with no change in its own length
   • C.Concentrically accelerating hip extension as it shortens against the bar
   • D.Eccentrically decelerating hip extension as the pelvis rotates forward

   The hip is flexing on the way down, so the gluteus maximus, a hip extensor, is producing tension while being lengthened. A muscle that lengthens under tension is eccentrically decelerating the motion the load is creating, which is why the descent is controlled rather than free-falling.

   Source: NASM Essentials of Personal Fitness Training, human movement science chapter (muscle action spectrum)Report a problem with this question

2. 2. A trainer explains that the lowering phase of a dumbbell chest press is where the load is truly controlled. Which description of the pectoralis major makes that statement true?

   • A.It relaxes fully while the shoulder ligaments absorb the descending load
   • B.It shortens while the force it is producing exceeds the external resistance
   • C.It lengthens while the external resistance exceeds the force it is producing✓ Answer
   • D.It holds one length while force and external resistance are exactly equal

   An eccentric action is defined by the external resistance being greater than the force the muscle generates, so the muscle lengthens while still under tension. That braking tension is what slows the dumbbells, and it is also why the greatest force and most delayed soreness come from lowering phases.

   Source: NASM Essentials of Personal Fitness Training, human movement science chapter (eccentric muscle action)Report a problem with this question

3. 3. During a standing barbell overhead press the anterior deltoid is the prime mover. Which statement correctly assigns another muscle its role in that exercise?

   • A.The upper trapezius acts as the antagonist, blocking upward rotation of the scapula
   • B.The latissimus dorsi acts as a synergist, helping the deltoid drive the bar overhead
   • C.The triceps brachii acts as the antagonist, opposing the deltoid during the press
   • D.The rotator cuff acts as a stabilizer, keeping the humeral head centered in the glenoid✓ Answer

   A stabilizer supports the joint so the prime mover can work, and that is exactly the rotator cuff's job here: it compresses and centers the humeral head while the deltoid raises the arm. The triceps extends the elbow, so it is a synergist rather than an antagonist, and the upper trapezius helps produce scapular upward rotation instead of resisting it.

   Source: NASM Essentials of Personal Fitness Training, human movement science chapter (muscle roles in a force-couple)Report a problem with this question

4. 4. As a client presses a dumbbell overhead, each scapula must upwardly rotate. Which group of muscles forms the force-couple that produces this scapular motion?

   • A.Upper trapezius, lower trapezius and serratus anterior pulling from different angles✓ Answer
   • B.Posterior deltoid, infraspinatus and teres minor pulling in the same direction
   • C.Pectoralis minor, latissimus dorsi and teres major pulling on the inferior angle
   • D.Rhomboid major, rhomboid minor and levator scapulae pulling in the same direction

   A force-couple is two or more muscles pulling from different directions to create one joint motion. Upward rotation of the scapula comes from the upper trapezius pulling up, the lower trapezius pulling down and in, and the serratus anterior pulling around the rib cage, and their combined pull rotates the glenoid upward so the arm can clear overhead.

   Source: NASM Essentials of Personal Fitness Training, human movement science chapter (scapular force-couple)Report a problem with this question

5. 5. A trainer is explaining the local stabilization system of the core to a new client. Which description matches that system?

   • A.Abdominal muscles that produce trunk flexion and rotation against resistance
   • B.Large superficial muscles that move the trunk and transfer load to the limbs
   • C.Deep muscles attaching to the vertebrae that stabilize segment to segment✓ Answer
   • D.Muscles crossing the hip joint that generate propulsion force during running

   The local stabilization system is defined by attachment and function rather than by size: muscles such as the transverse abdominis, multifidus, internal oblique, diaphragm and pelvic floor attach directly to the vertebrae and control motion between one segment and the next. The larger muscles that move the trunk and transfer load belong to the global movement system.

   Source: NASM Essentials of Personal Fitness Training, core training chapter (local versus global systems)Report a problem with this question

6. 6. A client performs a standing side lateral raise, lifting a dumbbell in each hand out to the side up to shoulder height. In which plane and about which axis does this movement occur?

   • A.The sagittal plane, about a medial-lateral axis
   • B.The transverse plane, about a longitudinal axis
   • C.The frontal plane, about an anterior-posterior axis✓ Answer
   • D.The frontal plane, about a medial-lateral axis

   Each plane is paired with the axis it rotates about: the frontal plane divides the body front from back and its motions, abduction and adduction, occur about an anterior-posterior axis. Raising the arms away from the midline is shoulder abduction, so it is a frontal-plane movement rather than the flexion and extension seen in the sagittal plane.

   Source: NASM Essentials of Personal Fitness Training, human movement science chapter (planes of motion and axes)Report a problem with this question

7. 7. A client stands with both feet planted and rotates the torso to pull a cable handle across the body, finishing with the shoulders turned away from the machine. Which plane of motion does this exercise train?

   • A.The transverse plane, because the trunk rotates about a longitudinal vertical axis✓ Answer
   • B.The frontal plane, because the trunk laterally flexes toward the cable stack
   • C.The frontal plane, because the arm travels away from the midline of the body
   • D.The sagittal plane, because the shoulder flexes as the handle is pulled inward

   Rotation is the defining transverse-plane motion, and it occurs about a longitudinal axis running head to toe. Because the feet stay planted and the shoulders turn on the pelvis, the dominant joint action is trunk rotation, which places the exercise in the transverse plane no matter what the arm is doing.

   Source: NASM Essentials of Personal Fitness Training, human movement science chapter (transverse plane motions)Report a problem with this question

8. 8. A client performs a standing calf raise, rising onto the toes with the balls of the feet on a step. Which lever class does the foot act as during the rise?

   • A.First class, because the ankle sits between body weight and the Achilles pull
   • B.Second class, because body weight sits between the toes and the Achilles pull✓ Answer
   • C.Third class, because the ankle sits between the toes and the calf musculature
   • D.Third class, because the Achilles pull sits between the toes and body weight

   Lever class is decided by what sits in the middle. In a calf raise the ball of the foot is the fulcrum, the Achilles insertion applies the effort at the heel, and body weight passes through the ankle in between, which is the resistance-in-the-middle arrangement of a second-class lever and the reason it offers a mechanical advantage.

   Source: NASM Essentials of Personal Fitness Training, human movement science chapter (levers and mechanical advantage)Report a problem with this question

9. 9. A client holds a static hamstring stretch and, after roughly thirty seconds, the muscle lets go and the stretch deepens. Which mechanism explains that release?

   • A.The Golgi tendon organ senses length and signals the muscle to contract
   • B.The Golgi tendon organ senses tension and signals the muscle to relax✓ Answer
   • C.The muscle spindle senses length change and signals the muscle to relax
   • D.The muscle spindle senses tension and signals the muscle to contract

   The two mechanoreceptors are easy to reverse. The muscle spindle lies parallel to the fibers, senses length and rate of length change, and triggers a protective contraction, while the Golgi tendon organ sits at the musculotendinous junction, senses tension, and inhibits the muscle. Holding the stretch long enough loads the tendon organ, producing autogenic inhibition and the release.

   Source: NASM Essentials of Personal Fitness Training, nervous system chapter (mechanoreceptors and autogenic inhibition)Report a problem with this question

10. 10. A client sits at a desk most of the day and the hip flexors have adapted to a chronically shortened resting length. What happens to the force those muscles can produce?

    • A.Force output falls, because a shortened muscle recruits only slow-twitch fibers
    • B.Force output rises, because the shortened sarcomeres start each rep pre-loaded
    • C.Force output stays level, because resting length does not affect cross-bridges
    • D.Force output falls, because the sarcomeres sit away from their optimal length✓ Answer

    The length-tension relationship says a sarcomere generates maximal force only near one optimal resting length, where the greatest number of actin and myosin cross-bridges can form. A muscle held chronically short, or chronically long, sits off that point and produces less force, which is how postural habits become measurable weakness.

    Source: NASM Essentials of Personal Fitness Training, human movement science chapter (length-tension relationship)Report a problem with this question

11. 11. A client curls the same dumbbell first slowly and then as fast as possible through the concentric phase. What happens to the force the elbow flexors can generate as concentric speed rises?

    • A.Force output is unchanged, because the weight of the dumbbell has not changed
    • B.Force output increases, because faster shortening recruits more units per second
    • C.Force output decreases, because faster shortening lets fewer cross-bridges form✓ Answer
    • D.Force output increases, because momentum adds to the tension inside the muscle

    The force-velocity relationship is inverse for concentric actions: the faster a muscle shortens, the less time each myosin head has to attach, pull and reattach, so fewer cross-bridges are engaged at any instant and force falls. The same curve explains why eccentric actions, where the muscle is being lengthened, can generate the highest forces of all.

    Source: NASM Essentials of Personal Fitness Training, human movement science chapter (force-velocity curve)Report a problem with this question

12. 12. During an overhead squat, a trainer sees the client's knees drift inward toward each other. Which pairing of muscle activity at the hip most likely explains that fault?

    • A.The adductor complex is overactive and the gluteus medius of that hip is underactive✓ Answer
    • B.The hip flexor complex is overactive and the hamstring complex is underactive
    • C.The gluteus medius is overactive and the adductor complex of that hip is underactive
    • D.The erector spinae is overactive and the deep abdominal wall is underactive

    Knees moving inward is a frontal-plane fault, so the trainer looks at the frontal-plane pair at the hip. A short, overactive adductor complex pulls the femur into adduction and internal rotation, and through altered reciprocal inhibition it damps the gluteus medius that would otherwise hold the femur out, so the knee collapses toward the midline.

    Source: NASM Essentials of Personal Fitness Training, assessment chapter (overhead squat compensations)Report a problem with this question

13. 13. A client's hip flexor complex is chronically overactive, the gluteus maximus fires poorly, and the hamstrings take over hip extension. What are those two effects called, in order?

    • A.Relative flexibility, followed by arthrokinematic joint dysfunction
    • B.Altered reciprocal inhibition, followed by synergistic dominance✓ Answer
    • C.Reciprocal inhibition, followed by improved neuromuscular control
    • D.Autogenic inhibition, followed by an altered length-tension curve

    Normal reciprocal inhibition is useful: an agonist contracting relaxes its antagonist. When a muscle is chronically overactive that signal becomes altered reciprocal inhibition, holding the functional antagonist switched down. A synergist then compensates for the inhibited prime mover, which is synergistic dominance, and here the hamstrings do the extending the gluteus maximus should be doing.

    Source: NASM Essentials of Personal Fitness Training, human movement science chapter (cumulative injury cycle)Report a problem with this question

14. 14. A client performs one maximal set of six heavy squats that takes about ten seconds from the first rep to the last. Which pathway supplies most of the ATP for that set?

    • A.The oxidative pathway, burning fat and carbohydrate inside the mitochondria
    • B.The glycolytic pathway, breaking muscle glycogen down as far as pyruvate
    • C.The phosphagen pathway, rebuilding ATP from fat delivered by the bloodstream
    • D.The phosphagen pathway, drawing on stored ATP and creatine phosphate✓ Answer

    Short maximal efforts are supplied mainly by the phosphagen pathway, which regenerates ATP from stored creatine phosphate without oxygen. It is the fastest way to make ATP but has the smallest capacity, so it can carry only very brief all-out work before glycolysis becomes the larger contributor.

    Source: NASM Essentials of Personal Fitness Training, exercise metabolism and bioenergetics chapterReport a problem with this question

15. 15. A trainer tells a client that the body switches on one energy system at a time during a session. Which correction should the trainer make?

    • A.All three energy pathways run at once and only the dominant contributor shifts✓ Answer
    • B.The pathways run in a fixed order and each stops once the next one starts working
    • C.Only the oxidative pathway runs during exercise and the others work while at rest
    • D.The phosphagen pathway shuts down completely once glycolysis produces lactate

    The three pathways are not switches. Phosphagen, glycolytic and oxidative metabolism all operate continuously, and intensity and duration decide which one contributes the largest share of ATP at a given moment. Even during a heavy set the oxidative system keeps working, and even at rest a small amount of anaerobic turnover continues.

    Source: NASM Essentials of Personal Fitness Training, exercise metabolism and bioenergetics chapterReport a problem with this question

16. 16. A trainer records a client's resting stroke volume as 70 mL per beat and resting heart rate as 60 beats per minute. What is the cardiac output, and how is it obtained?

    • A.130 mL per minute, from stroke volume added to the heart rate value
    • B.0.86 mL per beat, from heart rate divided by the stroke volume value
    • C.1.17 mL per beat, from stroke volume divided by the heart rate value
    • D.4200 mL per minute, from stroke volume multiplied by heart rate✓ Answer

    Cardiac output is the volume of blood the heart pumps each minute, and it equals stroke volume multiplied by heart rate. Here 70 mL per beat times 60 beats per minute gives 4200 mL per minute, or 4.2 L per minute, and the same formula explains why trained clients can raise output by increasing stroke volume rather than heart rate.

    Source: NASM Essentials of Personal Fitness Training, cardiorespiratory system chapter (cardiac output)Report a problem with this question

17. 17. A client asks what happens to blood once it returns to the heart from the working muscles during a run. Which circuit does it enter next?

    • A.The left side of the heart pumps it to the lungs to be reoxygenated
    • B.The right side of the heart pumps it to the body through the aorta
    • C.The left atrium pumps it straight into the working muscle capillaries
    • D.The right side of the heart pumps it to the lungs to be reoxygenated✓ Answer

    The heart runs two circuits in series. Deoxygenated blood returns from the body to the right atrium and right ventricle, which push it through the pulmonary circuit to the lungs; oxygenated blood then comes back to the left side, which drives the systemic circuit out through the aorta to the muscles.

    Source: NASM Essentials of Personal Fitness Training, cardiorespiratory system chapter (pulmonary and systemic circuits)Report a problem with this question

18. 18. A motor neuron fires and the impulse spreads along a muscle fiber's membrane. What does the calcium released from the sarcoplasmic reticulum do next?

    • A.It binds troponin so tropomyosin uncovers the binding sites on actin✓ Answer
    • B.It binds tropomyosin so the myosin filament itself shortens inside the fiber
    • C.It binds the myosin head so the actin filament shortens toward the Z-line
    • D.It binds actin so acetylcholine is released across the neuromuscular junction

    Calcium is the trigger that uncovers the actin. It binds troponin, troponin shifts tropomyosin off the myosin binding sites, and the myosin heads then attach and pull the actin past them. Note that neither filament shortens: the sarcomere shortens because actin and myosin slide over one another.

    Source: NASM Essentials of Personal Fitness Training, muscular system chapter (sliding filament theory)Report a problem with this question

19. 19. A client works a warehouse floor and spends eight hours a day standing and walking while carrying light loads. Which fiber profile best matches that demand?

    • A.Type I fibers, which are smaller in diameter, rich in mitochondria and slow to fatigue✓ Answer
    • B.Type IIa fibers, which are large in diameter and rely mainly on creatine phosphate
    • C.Type IIx fibers, which are large in diameter, fast to shorten and quick to fatigue
    • D.Type I fibers, which are large in diameter, pale in color and quick to fatigue

    Long, low-force, postural work is the job of Type I fibers. They have a smaller diameter, more capillaries, more mitochondria and more myoglobin, which is why they look redder and resist fatigue, and it is why postural muscles such as the soleus and the transverse abdominis are dominated by them.

    Source: NASM Essentials of Personal Fitness Training, muscular system chapter (muscle fiber types)Report a problem with this question

20. 20. A client performing depth jumps spends nearly a full second on the ground between landing and take-off. What does shortening that ground contact time do to the jump?

    • A.It raises power output, because less stored elastic energy is lost as heat✓ Answer
    • B.It lowers power output, because the muscle has less time to recruit more fibers
    • C.It raises power output, because the landing itself stretches the tendon less
    • D.It lowers power output, because the stretch reflex needs a long ground contact

    The stretch-shortening cycle has three parts: an eccentric loading phase, a transitional amortization phase, and a concentric unloading phase. Elastic energy stored during the eccentric phase dissipates as heat while the amortization phase drags on, so a shorter ground contact returns more of that energy and produces a more powerful jump.

    Source: NASM Essentials of Personal Fitness Training, plyometric training chapter (stretch-shortening cycle)Report a problem with this question

21. 21. A previously untrained client is noticeably stronger after four weeks of resistance training, but the limbs do not look any bigger. What best explains the strength gain?

    • A.An increase in the number of muscle fibers grown in the trained limbs
    • B.A conversion of slow-twitch fibers into fast-twitch fibers in the muscle
    • C.A larger amount of actin and myosin inside each trained muscle fiber
    • D.Better recruitment and firing rate of motor units by the nervous system✓ Answer

    Early strength gains are neural. In the first weeks the nervous system recruits more motor units, fires them faster and synchronizes them better, and it reduces the co-contraction that used to fight the movement. Structural change, meaning added actin and myosin within existing fibers, accounts for later gains and takes longer to become visible.

    Source: NASM Essentials of Personal Fitness Training, resistance training adaptations discussionReport a problem with this question

22. 22. A client trains hard but sleeps about five hours a night, and reports stalled progress and constant soreness. Why does the short sleep matter for recovery?

    • A.Cortisol is only produced during sleep, so short nights leave repair signals unsent
    • B.Sleep is when muscle fibers divide, so fewer hours means fewer new fibers are formed
    • C.Muscle glycogen is only rebuilt while asleep, so the carbohydrate eaten by day is wasted
    • D.Growth hormone release peaks in deep sleep, so tissue repair and protein synthesis suffer✓ Answer

    Growth hormone is released in pulses that are largest during deep sleep, and it drives protein synthesis and the repair of muscle, bone and connective tissue. Chronically short sleep both blunts that anabolic signal and keeps the catabolic hormone cortisol elevated, so training stress accumulates faster than the body can rebuild.

    Source: NASM Essentials of Personal Fitness Training, endocrine system chapter (growth hormone, cortisol and recovery)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 →