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NASM-MMACS practice questions

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Question 1Basic and Applied Sciences

Which structure connects muscle to bone and transmits the force produced by a contracting muscle?

  1. Fascia
  2. Bursa
  3. Tendon Correct answer.
  4. Ligament

Explanation

A tendon is dense regular connective tissue that attaches muscle to bone and carries tensile load from the muscle-tendon junction to the periosteum. Ligaments cross joints to connect bone to bone, fascia envelops and separates tissues, and bursae are fluid-filled sacs that reduce friction.

Question 2Basic and Applied Sciences

During a biceps curl, the elbow flexes while the hand holds a dumbbell. Which statement correctly describes the muscle action and the joint motion?

  1. The triceps acts concentrically as the agonist producing elbow extension.
  2. The biceps brachii acts isometrically because the joint angle changes.
  3. The biceps brachii acts as an antagonist while the triceps performs elbow flexion.
  4. The biceps brachii acts concentrically as the agonist producing elbow flexion. Correct answer.

Explanation

The muscle that produces the observed joint motion is the agonist (prime mover), and shortening under tension is a concentric action. Because the elbow is flexing against resistance, the biceps brachii is the concentrically acting agonist while the triceps lengthens as the antagonist.

Question 3Basic and Applied Sciences

Which muscle fiber type is characterized by a high oxidative capacity, many mitochondria, and slow contraction speed?

  1. Type IIa
  2. Type IIx
  3. Type IIb
  4. Type I Correct answer.

Explanation

Type I (slow-twitch) fibers rely on aerobic metabolism, are rich in mitochondria and capillaries, and are fatigue resistant, making them suited to postural and endurance work. Type II fibers contract faster and rely more on glycolytic metabolism.

Question 4Basic and Applied Sciences

A client performs a squat and the knees move inward during the ascent. Which cue best addresses this movement fault?

  1. Cue the client to round the lumbar spine to gain depth.
  2. Cue the client to push the knees out in line with the second and third toes. Correct answer.
  3. Cue the client to lift the heels off the floor during the ascent.
  4. Cue the client to increase the load to stabilize the pattern.

Explanation

Knee valgus during a squat reflects insufficient hip abduction and external rotation control, so an external-focus cue to track the knees over the second and third toes restores alignment. Adding load or altering spinal and foot position does not correct the frontal-plane control problem.

Question 5Basic and Applied Sciences

Which plane of motion divides the body into upper and lower halves and contains rotational movements such as spinal rotation?

  1. Sagittal plane
  2. Transverse plane Correct answer.
  3. Oblique plane
  4. Frontal plane

Explanation

The transverse (horizontal) plane divides the body into superior and inferior portions and is the plane in which rotation occurs about a vertical axis. The sagittal plane divides left and right, and the frontal plane divides front and back.

Question 6Basic and Applied Sciences

Which energy system predominates during a maximal-effort 10-second sprint?

  1. Phosphagen system Correct answer.
  2. Oxidative system
  3. Krebs cycle
  4. Electron transport chain

Explanation

The phosphagen (ATP-CP) system supplies ATP rapidly for very brief, maximal efforts lasting roughly 10 seconds or less. The oxidative system, including the Krebs cycle and electron transport chain, dominates longer-duration aerobic work.

Question 7Basic and Applied Sciences

Which description best defines the stretch-shortening cycle?

  1. A concentric action immediately followed by an isometric hold.
  2. An isometric contraction maintained while the joint angle changes.
  3. A slow eccentric action followed by a pause before the concentric phase.
  4. A rapid eccentric action immediately followed by a concentric action. Correct answer.

Explanation

The stretch-shortening cycle uses the elastic energy stored during a rapid eccentric (lengthening) phase and the stretch reflex to enhance the subsequent concentric action. A pause dissipates that stored energy and reduces the enhancement.

Question 8Basic and Applied Sciences

Which adaptation is a typical chronic response to a well-designed resistance training program?

  1. Increased resting heart rate
  2. Increased muscular strength and endurance Correct answer.
  3. Decreased motor unit recruitment
  4. Reduced muscle cross-sectional area

Explanation

Progressive resistance training increases strength and local muscular endurance through neural and hypertrophic adaptations. It does not reduce recruitment or muscle size, and it typically lowers rather than raises resting heart rate.

Question 9Basic and Applied Sciences

A client's shoulder elevation reveals excessive upward scapular movement during arm raise. Which term describes this observation?

  1. Scapular elevation Correct answer.
  2. Scapular retraction
  3. Scapular depression
  4. Scapular winging

Explanation

Upward movement of the scapula along the rib cage is elevation, which normally accompanies arm raise but can become excessive when the upper trapezius dominates. Winging refers to the medial border lifting off the thorax, and depression is downward movement.

Question 10Basic and Applied Sciences

According to the sliding filament theory, what directly causes sarcomere shortening during a concentric contraction?

  1. The myosin filaments shorten in length.
  2. The actin filaments shorten in length.
  3. The Z-lines dissolve and reform.
  4. Actin and myosin filaments slide past one another. Correct answer.

Explanation

Myosin heads bind actin and pull the thin filaments toward the sarcomere center, so the filaments slide past each other while their individual lengths stay largely unchanged. Shortening occurs because the overlap between filaments increases and the Z-lines are drawn closer together.

Question 11Basic and Applied Sciences

Which muscle acts as a primary hip extensor during the upward phase of a barbell deadlift?

  1. Tensor fasciae latae
  2. Gluteus maximus Correct answer.
  3. Rectus femoris
  4. Iliopsoas

Explanation

The gluteus maximus is the strongest hip extensor and drives hip extension as the lifter stands up. The iliopsoas is a hip flexor, and the rectus femoris and tensor fasciae latae contribute mainly to knee extension and hip flexion or abduction.

Question 12Basic and Applied Sciences

A client can perform 12 repetitions of a shoulder press with a 20 kg load but fails at 13. Which load best represents an estimated 1RM using the Epley formula?

  1. 28 kg Correct answer.
  2. 32 kg
  3. 20 kg
  4. 24 kg

Explanation

The Epley formula estimates 1RM as load multiplied by (1 + repetitions/30). With 20 kg for 12 repetitions, 20 × (1 + 12/30) = 20 × 1.4 = 28 kg.

Question 13Basic and Applied Sciences

Which statement best describes autogenic inhibition during flexibility work?

  1. The muscle spindle triggers contraction when the muscle is stretched rapidly.
  2. Joint receptors increase muscle tone when the joint is moved.
  3. The Golgi tendon organ triggers relaxation when tension in the tendon rises. Correct answer.
  4. Cutaneous receptors inhibit the antagonist during a stretch.

Explanation

Autogenic inhibition occurs when the Golgi tendon organ senses increased tension and inhibits the motor neuron supply to the same muscle, allowing it to lengthen. The muscle spindle instead drives a stretch reflex, which is a different mechanism.

Question 14Basic and Applied Sciences

A runner reports pain along the lateral thigh that worsens with hip abduction against resistance. Which structure is most likely involved?

  1. Iliotibial band Correct answer.
  2. Biceps femoris
  3. Adductor longus
  4. Rectus abdominis

Explanation

Lateral thigh pain provoked by resisted hip abduction points to the iliotibial band and its associated musculature, which are loaded in that action. The adductors act on the medial thigh, the rectus abdominis flexes the trunk, and the biceps femoris flexes the knee and extends the hip.

Question 15Basic and Applied Sciences

Which acute variable should be manipulated first when a client plateaus on a hypertrophy program at 3 sets of 10 repetitions?

  1. Reduce the number of sets to one.
  2. Switch entirely to isometric holds.
  3. Eliminate the rest interval entirely.
  4. Increase training volume or load progressively. Correct answer.

Explanation

Hypertrophy requires progressive overload, so increasing volume or load within tolerable limits provides the stimulus needed to continue adapting. Reducing volume or removing rest reduces the training stimulus and impairs performance.

Question 16Basic and Applied Sciences

Which best explains why a client should avoid holding the breath throughout a heavy set?

  1. Breath holding increases oxygen delivery to the brain.
  2. Breath holding reduces venous return and can cause a sharp rise in blood pressure. Correct answer.
  3. Breath holding reduces intrathoracic pressure.
  4. Breath holding improves muscle relaxation between repetitions.

Explanation

Sustained breath holding against a closed glottis raises intrathoracic pressure, impedes venous return, and produces a marked pressor response. Clients should use controlled breathing, exhaling during the concentric phase, to limit that risk.

Question 17Basic and Applied Sciences

Which postural deviation is characterized by an anterior pelvic tilt with increased lumbar lordosis?

  1. Flat-back posture
  2. Sway-back posture
  3. Lower crossed syndrome Correct answer.
  4. Upper crossed syndrome

Explanation

Lower crossed syndrome pairs tight hip flexors and lumbar extensors with weak abdominals and gluteals, producing anterior pelvic tilt and accentuated lumbar lordosis. Upper crossed syndrome affects the head, neck, and shoulders rather than the pelvis.

Question 18Basic and Applied Sciences

A client performs a single-leg squat and the stance knee collapses inward while the trunk leans laterally. Which muscle group most likely needs targeted strengthening?

  1. Elbow flexors
  2. Hip adductors and internal rotators
  3. Ankle dorsiflexors only
  4. Hip abductors and external rotators Correct answer.

Explanation

Knee valgus with a lateral trunk shift indicates insufficient frontal-plane control at the hip, so strengthening the gluteus medius and other hip abductors and external rotators is appropriate. Adductor and internal rotator dominance would aggravate rather than correct the pattern.

Question 19Basic and Applied Sciences

During a two-arm cable press, a client's shoulders protract at the end of the press. Which cue best addresses the fault?

  1. Cue the client to elevate the shoulders toward the ears.
  2. Cue the client to push the handles as far forward as possible.
  3. Cue the client to increase the load to stabilize the scapula.
  4. Cue the client to pinch the shoulder blades back and down throughout. Correct answer.

Explanation

Excessive protraction during pressing reflects loss of scapular retraction and depression control, so cueing the shoulder blades back and down restores the desired position. Pushing farther forward or elevating the shoulders would worsen the fault, and adding load does not fix the underlying control issue.

Question 20Basic and Applied Sciences

Which statement about reciprocal inhibition is accurate during a static stretch of the hamstrings?

  1. The muscle spindle inhibits the Golgi tendon organ.
  2. The Golgi tendon organ inhibits the muscle spindle.
  3. The contracting quadriceps inhibit the hamstrings. Correct answer.
  4. The stretched hamstrings inhibit the quadriceps.

Explanation

Reciprocal inhibition describes the reduced neural drive to the antagonist when the agonist contracts. Contracting the quadriceps therefore reduces hamstring activation, allowing the hamstrings to lengthen further during a stretch.

Question 21Basic and Applied Sciences

A client's overhead squat reveals the arms falling forward and the heels rising. Which combination of findings is most consistent with these observations?

  1. Excessive ankle plantar flexion with strong thoracic extension
  2. Limited ankle dorsiflexion with poor thoracic extension Correct answer.
  3. Limited shoulder internal rotation with strong hip flexors
  4. Tight hamstrings with strong gluteus medius

Explanation

Rising heels during an overhead squat suggest limited ankle dorsiflexion, while the arms falling forward suggests restricted thoracic extension or shoulder mobility. Together they point to a mobility limitation that should be screened and addressed before loading the pattern.

Question 22Basic and Applied Sciences

Which statement accurately explains the relationship between force output and muscle length?

  1. Force is constant across all muscle lengths.
  2. Force is greatest at intermediate length where actin-myosin overlap is optimal. Correct answer.
  3. Force is greatest at the shortest muscle length because filaments overlap most.
  4. Force is greatest when the muscle is stretched so no overlap exists.

Explanation

Tension depends on the number of cross-bridges that can form, which peaks at an intermediate length where actin and myosin overlap optimally. At very short or very long lengths, overlap is reduced and force falls.

Question 23Basic and Applied Sciences

A client with a history of low back pain performs a deadlift and the lumbar spine flexes under load. Which modification is most appropriate?

  1. Increase the load to reinforce bracing.
  2. Remove the hip hinge and perform only spinal flexion.
  3. Encourage the client to hold the breath and round further.
  4. Reduce the load and cue a neutral spine with hip hinge mechanics. Correct answer.

Explanation

Lumbar flexion under load increases shear stress on the spine, so reducing load and re-teaching a neutral-spine hip hinge restores a safer position. Adding load or encouraging further flexion would increase risk rather than improve mechanics.

Question 24Basic and Applied Sciences

A client reports a 6 out of 10 rating on a perceived exertion scale during a moderate-intensity session. Which interpretation is most consistent with standard RPE use?

  1. The rating indicates the client is at maximal effort.
  2. The rating reflects an objective heart rate measurement.
  3. The rating predicts the client's one-repetition maximum.
  4. The rating reflects the client's subjective perception of effort. Correct answer.

Explanation

A rating of perceived exertion is a subjective measure of how hard the client feels the work is, and 6 out of 10 corresponds to a moderate level. It is not a direct physiological measure, a maximal marker, or a predictor of 1RM.

Question 25Basic and Applied Sciences

Which statement best explains why static stretching immediately before a maximal power activity is generally discouraged?

  1. Static stretching permanently damages muscle spindles.
  2. Static stretching eliminates the stretch-shortening cycle permanently.
  3. Static stretching increases muscle temperature to a harmful level.
  4. Static stretching acutely reduces force and power output in the stretched muscles. Correct answer.

Explanation

Prolonged static stretching before maximal power work can transiently reduce force and power, likely through altered neuromuscular and musculotendinous stiffness. Dynamic warm-up activities are therefore preferred to prepare for explosive performance.

Question 26Basic and Applied Sciences

Which muscle fiber type is characterized by a high oxidative capacity, a dense capillary supply, and resistance to fatigue?

  1. Type I slow-twitch fibers Correct answer.
  2. Type IIa fast-twitch fibers
  3. Type IIx fast-twitch fibers
  4. Intrafusal muscle fibers

Explanation

Type I fibers rely primarily on aerobic metabolism, contain abundant mitochondria and myoglobin, and are surrounded by more capillaries, which makes them highly fatigue resistant. This profile suits sustained postural and endurance activity rather than rapid force production.

Question 27Basic and Applied Sciences

Which anatomical plane divides the body into left and right halves and contains flexion and extension movements such as a biceps curl?

  1. Sagittal plane Correct answer.
  2. Transverse plane
  3. Frontal plane
  4. Oblique plane

Explanation

The sagittal plane splits the body into left and right portions, and movement occurring within it includes flexion and extension. A biceps curl happens primarily in this plane because the forearm moves forward and back around a medial-lateral axis.

Question 28Basic and Applied Sciences

During a heavy barbell back squat, which muscle group acts as the primary mover for knee extension as the client rises from the bottom position?

  1. Gastrocnemius
  2. Hamstrings
  3. Hip adductors
  4. Quadriceps Correct answer.

Explanation

The quadriceps cross the anterior knee and produce knee extension, which is the dominant action when driving up from a squat. The hamstrings assist at the hip and knee but are not the primary knee extensors.

Question 29Basic and Applied Sciences

Which energy system resynthesizes ATP most rapidly and therefore dominates during a single maximal jump or throw lasting about two to three seconds?

  1. The oxidative system
  2. The phosphagen system Correct answer.
  3. Aerobic glycolysis
  4. The Krebs cycle

Explanation

The phosphagen system uses stored creatine phosphate to regenerate ATP almost instantly, which supports very brief maximal efforts. Its capacity is small, so it cannot sustain activity beyond roughly ten seconds.

Question 30Basic and Applied Sciences

Which structure connects muscle to bone and transmits the force generated by a contracting muscle?

  1. Tendon Correct answer.
  2. Bursa
  3. Fascia
  4. Ligament

Explanation

Tendons are dense connective tissues that attach muscle to bone and carry tensile force from the muscle-tendon unit. Their high collagen content allows them to withstand substantial load.

Question 31Basic and Applied Sciences

Which joint action occurs when the angle between the forearm and the upper arm decreases as the elbow bends?

  1. Rotation
  2. Flexion Correct answer.
  3. Abduction
  4. Extension

Explanation

Flexion decreases the angle at a joint, which is exactly what happens when the elbow bends and the forearm moves toward the upper arm. Extension would increase that angle.

Question 32Basic and Applied Sciences

Which physiological response is expected immediately after a client performs a moderate-intensity aerobic warm-up?

  1. Decreased synovial fluid production
  2. Decreased core temperature
  3. Reduced blood flow to working muscles
  4. Increased heart rate and vasodilation in active tissue Correct answer.

Explanation

A warm-up raises heart rate and cardiac output while local vasodilation increases blood flow to active muscle. Core temperature and synovial fluid also rise, which improves tissue readiness for training.

Question 33Basic and Applied Sciences

Which term describes the ability of a joint to move through its full range of motion while surrounding tissues remain healthy?

  1. Muscular strength
  2. Flexibility Correct answer.
  3. Muscular endurance
  4. Balance

Explanation

Flexibility refers to the range of motion available at a joint or series of joints, influenced by muscle, tendon, and connective tissue extensibility. It is distinct from strength and endurance capacities.

Question 34Basic and Applied Sciences

A client performing a seated row retracts the scapulae during the pull but lets the shoulders drift forward at the end of the return. Which muscle group should be emphasized to control that return phase?

  1. Rhomboids and middle trapezius Correct answer.
  2. Pectoralis major and anterior deltoid
  3. Latissimus dorsi and teres major
  4. Biceps brachii and brachialis

Explanation

The rhomboids and middle trapezius produce scapular retraction and eccentric control as the shoulders return forward. Strengthening them helps the client maintain scapular positioning throughout the row.

Question 35Basic and Applied Sciences

A client new to resistance training can complete 15 repetitions with a load but shows deteriorating form on the last three. Which acute variable adjustment is most appropriate?

  1. Increase the load and keep the same repetition target
  2. Add additional sets at the same load immediately
  3. Switch to single-joint exercises only
  4. Reduce the load until technique remains consistent through the set Correct answer.

Explanation

Form breakdown near the end of a set indicates the load is too high for the client's current capacity. Reducing the load allows the client to complete the target repetitions with sound mechanics and appropriate training stimulus.

Question 36Basic and Applied Sciences

A client's knee tracks outside the second toe during a forward lunge. Which cue most directly addresses this fault?

  1. Push the knee outward so it aligns over the foot Correct answer.
  2. Rotate the rear foot inward
  3. Increase the stride length dramatically
  4. Shift more weight onto the front toes

Explanation

Cueing the client to drive the knee outward over the foot promotes hip abductor and external rotator engagement, which controls frontal-plane knee position. This directly corrects the valgus tendency seen in the lunge.

Question 37Basic and Applied Sciences

Which principle explains why a client who has trained with 3 sets of 10 repetitions for several months now needs a greater stimulus to keep improving?

  1. Principle of individualization
  2. Principle of progressive overload Correct answer.
  3. Principle of reversibility
  4. Principle of specificity

Explanation

Progressive overload states that training stimulus must increase over time as the body adapts to maintain continued improvement. Once the client adapts to the current volume and load, the program must be advanced.

Question 38Basic and Applied Sciences

A client reports sharp anterior shoulder pain when the arm is raised overhead during a lateral raise. Which action is most appropriate for the personal trainer?

  1. Modify the range and refer the client to a qualified healthcare professional Correct answer.
  2. Replace the exercise with an overhead press for strength
  3. Apply deep pressure to the painful area and continue
  4. Continue the exercise but increase the load gradually

Explanation

Sharp pain during movement is a red flag that falls outside a trainer's scope of practice. The trainer should avoid provoking the symptom, modify or discontinue the exercise, and refer the client for medical evaluation.

Question 39Basic and Applied Sciences

Which assessment best estimates a client's cardiorespiratory capacity by measuring heart rate response to a fixed submaximal workload?

  1. YMCA bike test Correct answer.
  2. Single-leg balance test
  3. Overhead squat assessment
  4. Grip dynamometer test

Explanation

The YMCA bike test uses submaximal steady-state heart rate to estimate maximal oxygen consumption and cardiorespiratory fitness. The other options assess movement quality, balance, or strength rather than aerobic capacity.

Question 40Basic and Applied Sciences

A client performing a plank lets the hips sag toward the floor. Which muscle group is failing to maintain the required position?

  1. Deep abdominal and gluteal muscles Correct answer.
  2. Ankle dorsiflexors
  3. Hip flexors
  4. Cervical extensors

Explanation

A sagging plank indicates the deep abdominal wall and gluteals are not maintaining lumbopelvic stability. Cueing these muscles to co-contract restores a neutral spine position.

Question 41Basic and Applied Sciences

Which statement best describes the role of the Golgi tendon organ during a heavy eccentric contraction?

  1. It monitors joint position in the skin
  2. It detects muscle length change and triggers contraction
  3. It senses tension and can inhibit the muscle to protect it from excessive load Correct answer.
  4. It controls blood flow to the working muscle

Explanation

The Golgi tendon organ lies in the musculotendinous junction and senses tension, triggering inhibition of the muscle when tension becomes excessive. This protective reflex helps regulate force output during heavy loading.

Question 42Basic and Applied Sciences

A client with limited ankle dorsiflexion cannot keep the heels down during a squat. Which mobility strategy is most appropriate before squatting?

  1. Ankle dorsiflexion mobility drills and calf stretching Correct answer.
  2. Aggressive hamstring stretching only
  3. Plyometric ankle hops
  4. Static stretching of the hip flexors

Explanation

Limited dorsiflexion restricts the shin's ability to travel forward, which lifts the heels. Targeting the ankle with dorsiflexion drills and calf stretching addresses the specific restriction before the squat.

Question 43Basic and Applied Sciences

Which adaptation is most associated with a periodized program that alternates high-volume hypertrophy phases with lower-volume strength phases?

  1. Continuous linear gains with no plateaus
  2. Immediate maximal strength gains in the first week
  3. Elimination of the need for recovery
  4. Managed fatigue and reduced risk of overtraining Correct answer.

Explanation

Periodization varies training stress and recovery across phases, which manages accumulated fatigue and reduces overtraining risk while supporting continued adaptation. It also helps address plateaus inherent in unchanging programs.

Question 44Basic and Applied Sciences

A client who runs three times per week wants to improve vertical jump. Which training principle best justifies adding low-volume plyometric work rather than more distance running?

  1. Overload
  2. Reversibility
  3. Variation
  4. Specificity Correct answer.

Explanation

Specificity holds that training adaptations reflect the specific demand imposed. Vertical jump requires rapid force production, which plyometrics train, whereas distance running does not develop that quality.

Question 45Basic and Applied Sciences

A client's blood pressure reads 148/96 mm Hg at rest before a session. Which response is most consistent with safe practice?

  1. Increase the intensity to lower blood pressure acutely
  2. Proceed with a maximal-intensity session as planned
  3. Proceed but omit the warm-up to save time
  4. Hold the session and recommend follow-up with a healthcare provider Correct answer.

Explanation

A resting reading of 148/96 mm Hg is elevated and warrants caution and medical follow-up before vigorous exercise. The trainer should not proceed with high-intensity work and should refer the client appropriately.

Question 46Basic and Applied Sciences

During a maximal isometric contraction, which neural mechanism primarily increases force output in the first few weeks of training?

  1. Increased capillary density
  2. Greater tendon stiffness alone
  3. Increased muscle fiber cross-sectional area
  4. Improved motor unit recruitment and rate coding Correct answer.

Explanation

Early strength gains are largely neural and reflect improved motor unit recruitment, synchronization, and rate coding. Structural changes such as hypertrophy take longer to develop.

Question 47Basic and Applied Sciences

A client alternates between a heavy strength day and a light technique day within the same week. Which concept does this best illustrate?

  1. Detraining
  2. Undulating periodization Correct answer.
  3. Concurrent endurance tapering
  4. Static flexibility training

Explanation

Undulating periodization varies training intensity and volume across sessions within a week rather than across longer blocks. Alternating heavy and light days is a classic example of this model.

Question 48Basic and Applied Sciences

A client reports that their resting heart rate has dropped by eight beats per minute over three months of consistent aerobic training. Which adaptation best explains this change?

  1. Decreased capillary density
  2. Reduced stroke volume
  3. Increased parasympathetic tone and greater stroke volume Correct answer.
  4. Reduced mitochondrial density

Explanation

Aerobic training increases stroke volume and enhances parasympathetic influence on the heart, both of which lower resting heart rate. These central and autonomic adaptations reflect improved cardiovascular efficiency.

Question 49Basic and Applied Sciences

A client with a history of shoulder instability performs a bench press and the bar drifts toward the neck with the elbows flared. Which combination of corrections is most appropriate?

  1. Increase the load to stabilize the bar path
  2. Widen the grip and flare the elbows further
  3. Elevate the shoulders and press from the neck
  4. Retract and depress the scapulae and tuck the elbows to about 45 degrees Correct answer.

Explanation

Retracting and depressing the scapulae provides a stable base, while tucking the elbows to roughly 45 degrees reduces anterior stress on an unstable shoulder. Together these corrections improve bar path and joint safety.

Question 50Basic and Applied Sciences

Which statement best explains why a client's heart rate can remain elevated for several minutes after a vigorous interval session ends?

  1. The phosphagen system continues producing most of the ATP
  2. Core temperature falls rapidly below resting values
  3. Lactic acid permanently damages muscle tissue
  4. Oxygen deficit repayment and elevated sympathetic activity persist after exercise Correct answer.

Explanation

After vigorous exercise, excess post-exercise oxygen consumption reflects repayment of oxygen deficit, restoration of homeostasis, and residual sympathetic drive, all of which keep heart rate elevated. Core temperature and hormone levels also remain elevated briefly.